Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 13 de 13
Filter
1.
Emergencias (Sant Vicenç dels Horts) ; 36(2): 1-7, Abr. 2024. graf, tab
Article in Spanish | IBECS | ID: ibc-231797

ABSTRACT

Objetivos. Identificar factores pronósticos de desarrollo de síndrome neurológico tardío (SNT) después de un episodio inicial de intoxicación por monóxido de carbono (ICO), con el fin detectar precozmente a la población más susceptible y facilitar su acceso a un seguimiento específico. Métodos. Revisión retrospectiva de todos los casos de ICO que acudieron a los servicios de urgencias (SU) de 4 hospitales durante los últimos 10 años. Se analizaron datos demográficos y características clínicas en el momento del episodio. En la cohorte de pacientes con datos de seguimiento disponibles, se evaluó la aparición de SNT y su relación con diferentes variables en la exposición inicial al CO a través de técnicas de análisis multivariante. Resultados. Se identificaron 240 pacientes. La mediana de edad fue de 36,2 años (17,6-49,6). De ellos 108 (45,0%) eran hombres y 223 casos (92,9%) fueron accidentales. El nivel medio de COHb fue del 12,7% (6,2-18,7). En 44 (18,3%) episodios se disponía de datos de un seguimiento específico. En esta cohorte, 11 (25%) pacientes desarrollaron SNT. Una puntuación inicial más baja en la Escala Coma de Glasgow (GCS) (OR: 0,61, IC 95%: 0,41-0,92) fue predictor independiente del desarrollo del SNT, con un ABC en la curva COR de 0,876 (IC 95%: 0,761-0,990, p < 0,001). Conclusiones. Una puntuación inicial baja en la GCS parece ser un predictor clínico de desarrollo de SNT en la ICO. Dada la incidencia de SNT, consideramos fundamental establecer protocolos de seguimiento específico de estos pacientes tras su asistencia inicial en los SU. (AU)


Objectives. To identify predictors for developing delayed neurological syndrome (DNS) after an initial episode of carbon monoxide (CO) poisoning in the interest of detecting patients most likely to develop DNS so that they can be followed. Methods. Retrospective review of cases of CO poisoning treated in the past 10 years in the emergency departments of 4 hospitals in the AMICO study (Spanish acronym for the multicenter analysis of CO poisoning). We analyzed demographic characteristics of the patients and the clinical characteristics of the initial episode. The records of the cohort of patients with available follow-up information were reviewed to find cases of DNS. Data were analyzed by multivariant analysis to determine the relationship to characteristics of the initial exposure to CO. Results. A total of 240 cases were identified. The median (interquartile range) age of the patients was 36.2 years (17.6-49.6 years); 108 patients (45.0%) were men, and the poisoning was accidental in 223 cases (92.9%). The median carboxyhemoglobin concentration on presentation was 12.7% (6.2%-18.7%). Follow-up details were available for 44 patients (18.3%). Eleven of those patients (25%) developed DNS. A low initial Glasgow Coma Scale score predicted the development of DNS with an odds ratio (OR) of 0.61 (95% CI, 0.41-0.92) and an area under the receiver operating characteristic curve of 0.876 (95% CI, 0.761-0.990) (P <.001). Conclusions. The initial Glasgow Coma Scale score seems to be a clinical predictor of DNS after CO poisoning. We consider it important to establish follow-up protocols for patients with CO poisoning treated in hospital EDs. (AU)


Subject(s)
Humans , Carbon Monoxide Poisoning , Neurotoxicity Syndromes , Carboxyhemoglobin , Prognosis , Emergency Medical Services , Poisoning/mortality
2.
Emergencias ; 36(2): 116-122, 2024 Apr.
Article in Spanish, English | MEDLINE | ID: mdl-38597618

ABSTRACT

OBJECTIVES: To identify predictors for developing delayed neurological syndrome (DNS) after an initial episode of carbon monoxide (CO) poisoning in the interest of detecting patients most likely to develop DNS so that they can be followed. MATERIAL AND METHODS: Retrospective review of cases of CO poisoning treated in the past 10 years in the emergency departments of 4 hospitals in the AMICO study (Spanish acronym for the multicenter analysis of CO poisoning). We analyzed demographic characteristics of the patients and the clinical characteristics of the initial episode. The records of the cohort of patients with available follow-up information were reviewed to find cases of DNS. Data were analyzed by multivariant analysis to determine the relationship to characteristics of the initial exposure to CO. RESULTS: A total of 240 cases were identified. The median (interquartile range) age of the patients was 36.2 years (17.6-49.6 years); 108 patients (45.0%) were men, and the poisoning was accidental in 223 cases (92.9%). The median carboxyhemoglobin concentration on presentation was 12.7% (6.2%-18.7%). Follow-up details were available for 44 patients (18.3%). Eleven of those patients (25%) developed DNS. A low initial Glasgow Coma Scale score predicted the development of DNS with an odds ratio (OR) of 0.61 (95% CI, 0.41-0.92) and an area under the receiver operating characteristic curve of 0.876 (95% CI, 0.761-0.990) (P .001). CONCLUSION: The initial Glasgow Coma Scale score seems to be a clinical predictor of DNS after CO poisoning. We consider it important to establish follow-up protocols for patients with CO poisoning treated in hospital EDs.


OBJETIVO: Identificar factores pronósticos de desarrollo de síndrome neurológico tardío (SNT) después de un episodio inicial de intoxicación por monóxido de carbono (ICO), con el fin detectar precozmente a la población más susceptible y facilitar su acceso a un seguimiento específico. METODO: Revisión retrospectiva de todos los casos de ICO que acudieron a los servicios de urgencias (SU) de 4 hospitales durante los últimos 10 años. Se analizaron datos demográficos y características clínicas en el momento del episodio. En la cohorte de pacientes con datos de seguimiento disponibles, se evaluó la aparición de SNT y su relación con diferentes variables en la exposición inicial al CO a través de técnicas de análisis multivariante. RESULTADOS: Se identificaron 240 pacientes. La mediana de edad fue de 36,2 años (17,6-49,6). De ellos 108 (45,0%) eran hombres y 223 casos (92,9%) fueron accidentales. El nivel medio de COHb fue del 12,7% (6,2-18,7). En 44 (18,3%) episodios se disponía de datos de un seguimiento específico. En esta cohorte, 11 (25%) pacientes desarrollaron SNT. Una puntuación inicial más baja en la Escala Coma de Glasgow (GCS) (OR: 0,61, IC 95%: 0,41-0,92) fue predictor independiente del desarrollo del SNT, con un ABC en la curva COR de 0,876 (IC 95%: 0,761-0,990, p 0,001). CONCLUSIONES: Una puntuación inicial baja en la GCS parece ser un predictor clínico de desarrollo de SNT en la ICO. Dada la incidencia de SNT, consideramos fundamental establecer protocolos de seguimiento específico de estos pacientes tras su asistencia inicial en los SU.


Subject(s)
Carbon Monoxide Poisoning , Hyperbaric Oxygenation , Adult , Female , Humans , Male , Carbon Monoxide Poisoning/complications , Carbon Monoxide Poisoning/diagnosis , Carbon Monoxide Poisoning/therapy , Hyperbaric Oxygenation/methods , Retrospective Studies , Adolescent , Young Adult , Middle Aged
3.
Article in English | MEDLINE | ID: mdl-38519281

ABSTRACT

OBJECTIVE: To describe other reasons for requesting HIV serology in emergency departments (ED) other than the 6 defined in the SEMES-GESIDA consensus document (DC-SEMES-GESIDA) and to analyze whether it would be efficient to include any of them in the future. METHODS: Review of all HIV serologies performed during 2 years in 20 Catalan EDs. Serologies requested for reasons not defined by the DC-SEMES-GESIDA were grouped by common conditions, the prevalence (IC95%) of seropositivity for each condition was calculated, and those whose 95% confidence lower limit was >0.1% were considered efficient. Sensitivity analysis considered that serology would have been performed on 20% of cases attended and the remaining 80% would have been seronegative. RESULTS: There were 8044 serologies performed for 248 conditions not recommended by DC-SEMES-GESIDA, in 17 there were seropositive, and in 12 the performance of HIV serology would be efficient. The highest prevalence of detection corresponded to patients from endemic countries (7.41%, 0.91-24.3), lymphopenia (4.76%, 0.12-23.8), plateletopenia (4.37%, 1.20-10.9), adenopathy (3.45%, 0.42-11.9), meningoencephalitis (3.12%, 0.38-10.8) and drug use (2.50%, 0.68-6.28). Sensitivity analysis confirmed efficiency in 6 of them: endemic country origin, plateletopenia, drug abuse, toxic syndrome, behavioral-confusional disorder-agitation and fever of unknown origin. CONCLUSION: The DC-SEMES-GESIDA targeted HIV screening strategy in the ED could efficiently include other circumstances not previously considered; the most cost-effective would be origin from an endemic country, plateletopenia, drug abuse, toxic syndrome, behavioral-confusional-agitation disorder and fever of unknown origin.

4.
Rev. esp. quimioter ; 36(2): 169-179, abr. 2023. graf, tab
Article in Spanish | IBECS | ID: ibc-217398

ABSTRACT

Objective: To estimate the prevalence of unknown HIV infection in patients who consulted in hospital emergency services (ED) for conditions defined in the SEMES-GESIDA Consensus Document (DC), evaluate the efficiency of its im-plementation and investigate the efficiency of HIV serology determination in other conditions. Methods: Results were reviewed in 10 Catalan EDs for 12 months (July-21-June-22) after implementing CD recommendations: request HIV serology in case of suspected sexually transmitted infection, chemsex, post-exposure prophylaxis (PEP), mononucleosis syndrome, community pneumonia (18-65 y-o) or herpes zoster (18-65 y-o). Other reasons for request were included. Prevalence (%) of global seropositivity and for each circumstance was calculated, with a 95% confidence interval (95%CI). The efficient strategy was considered if the lower limit of the CI95%>0.1%. Results: A total of5,107 HIV serologies were performed: 2,847(56%) in situations specified in CD, and 2,266 (44%) in other 138 circumstances. Forty-eight unknown HIV infections were detected (prevalence=0.94%;95%CI=0.69-1.24). The prevalence was somewhat higher in DC requests (30 cas-es 1.12%) than the rest (18 cases 0.71%; p=0.16). The individualized prevalence of CD reasons ranged between 7.41% (95%CI=0.91-24.3) in chemsex and 0.42% 95%CI=0.14-0.98) in PPE, always efficient except herpes zoster (0.76%; CI95%=0.02-4.18). In other reasons, cases were detected in 12 circumstances, and in four the determination could be efficient: lymphopenia (10%;CI95%=0.25-44.5), fever with polyarthralgia-polyarthritis (7.41%;CI95% =0.91-24.3), behavioral alteration-confusion-encephalopathy (3.45%;95%CI=0.42-11.9) and fever of unknown origin (2.50%;95%CI=0.82-5.74). (AU)


Objetivo: Estimar la prevalencia de infección por VIH des-conocida en pacientes que consultan en servicios de urgencias hospitalarios (SUH) por las condiciones definidas en el Documento de Consenso (DC) de SEMES-GESIDA, evaluar la eficiencia de su implementación e investigar si en otras condiciones la determinación de serología VIH puede resultar eficiente.Método: Se revisaron los resultados obtenidos en 10 SUH catalanes durante los 12 meses (julio-21 a junio-22) siguientes a implementar las recomendaciones del DC de solicitar serología VIH a pacientes con sospecha de infección de transmisión sexual, práctica de chemsex, solicitud profilaxis post-exposición (PPE), síndrome mononucleósico, neumonía comunitaria (18-65 años) o herpes zóster (18-65 años). Se consignaron también otros motivos de solicitud. Se calculó la prevalencia (%) de seropositividad global y para cada circunstancia, con su intervalo de confianza del 95% (IC95%). Se consideró la estrategia eficiente si el límite inferior del IC95% era >0,1%.Resultados: Se realizaron 5.107 serologías VIH: 2.847 (56%) en situaciones especificadas en el DC, y 2.266 (44%) en otras 138 circunstancias. Se detectaron 48 infecciones por VIH desconocidas (prevalencia=0,94%; IC95%=0,69-1,24). La preva-lencia fue algo superior en las solicitudes ajustadas al DC (30 ca-sos, 1,12%) que en las que no (18 casos, 0,71%; p=0,16). La prevalencia individualizada para los motivos especificados en el DC osciló entre 7,41% IC95%=0,91-24,3) en práctica de chemsex y 0,42% (IC95%=0,14-0,98) en PPE, y siempre resultó eficiente, con excepción de herpes zóster (0,76%, IC95%=0,02-4,18). Respecto al resto de motivos de solicitud, se detectaron casos en 12 circunstancias, y en cuatro la determinación podría ser eficiente: linfopenia (10%, IC95%=0,25-44,5), fiebre con poliartralgias-poliartritis (7,41%, IC95%=0,91-24,3), alteración conductual-confusión-encefalopatía (3,45%,IC95%=0,42-11,9) y fiebre de origen desconocido(2,50%,IC95%=0,82-5,74)(AU)


Subject(s)
Humans , HIV Infections/epidemiology , Emergency Medical Services , Emergencies , Seroepidemiologic Studies , Prevalence
5.
Healthcare (Basel) ; 10(2)2022 Feb 13.
Article in English | MEDLINE | ID: mdl-35206978

ABSTRACT

This literature review aimed to determine the level of burnout, compassion fatigue, and compassion satisfaction, as well as their associated risks and protective factors, in healthcare professionals during the first year of the COVID-19 pandemic. We reviewed 2858 records obtained from the CINAHL, Cochrane Library, Embase, PsycINFO, PubMed, and Web of Science databases, and finally included 76 in this review. The main results we found showed an increase in the rate of burnout, dimensions of emotional exhaustion, depersonalization, and compassion fatigue; a reduction in personal accomplishment; and levels of compassion satisfaction similar to those before the pandemic. The main risk factors associated with burnout were anxiety, depression, and insomnia, along with some sociodemographic variables such as being a woman or a nurse or working directly with COVID-19 patients. Comparable results were found for compassion fatigue, but information regarding compassion satisfaction was lacking. The main protective factors were resilience and social support.

6.
Medicina (B.Aires) ; 79(1,supl.1): 62-67, abr. 2019. tab
Article in Spanish | LILACS | ID: biblio-1002607

ABSTRACT

La exposición prenatal al alcohol es causa de alteraciones somáticas, cognitivas y conductuales que se agrupan bajo el término de trastorno del espectro alcohólico fetal (TEAF). La evolución a largo plazo de los sujetos afectados a menudo es desfavorable, especialmente a nivel académico y adaptativo social. En el perfil neuropsicológico es característica la disfunción ejecutiva a menudo asociada a trastornos de la conducta que evolucionan en muchos casos hacia la delincuencia a partir de la adolescencia y en la edad adulta. Se han descrito también déficits de las habilidades sociales y la empatía. La exposición prenatal al alcohol constituye la causa más frecuente de trastorno del neurodesarrollo adquirido y prevenible.


Prenatal exposure to alcohol is the cause of cognitive and behavioural disorders grouped under the term fetal alcohol spectrum disorders (FASD). The long-term evolution of subjects with FASD is often unfavourable, especially in social and academic fields. Executive dysfunction is a hallmark deficit for children with FASD with increased rates of externalizing behaviours, such as aggressiveness and frequently delinquency in adolescence and adulthood. Deficits in social skills, empathy and communication ability are frequent observed among FASD. Prenatal exposure to alcohol is the most frequent cause of acquired and preventable neurodevelopmental disorder.


Subject(s)
Humans , Animals , Female , Pregnancy , Developmental Disabilities/diagnosis , Fetal Alcohol Spectrum Disorders/diagnosis , Prognosis , Social Behavior Disorders/etiology , Chick Embryo , Developmental Disabilities/complications , Developmental Disabilities/physiopathology , Uncertainty , Diagnostic Errors , Fetal Alcohol Spectrum Disorders/physiopathology
7.
Medicina (B Aires) ; 79(Suppl 1): 62-67, 2019.
Article in Spanish | MEDLINE | ID: mdl-30776282

ABSTRACT

Prenatal exposure to alcohol is the cause of cognitive and behavioural disorders grouped under the term fetal alcohol spectrum disorders (FASD). The long-term evolution of subjects with FASD is often unfavourable, especially in social and academic fields. Executive dysfunction is a hallmark deficit for children with FASD with increased rates of externalizing behaviours, such as aggressiveness and frequently delinquency in adolescence and adulthood. Deficits in social skills, empathy and communication ability are frequent observed among FASD. Prenatal exposure to alcohol is the most frequent cause of acquired and preventable neurodevelopmental disorder.


La exposición prenatal al alcohol es causa de alteraciones somáticas, cognitivas y conductuales que se agrupan bajo el término de trastorno del espectro alcohólico fetal (TEAF). La evolución a largo plazo de los sujetos afectados a menudo es desfavorable, especialmente a nivel académico y adaptativo social. En el perfil neuropsicológico es característica la disfunción ejecutiva a menudo asociada a trastornos de la conducta que evolucionan en muchos casos hacia la delincuencia a partir de la adolescencia y en la edad adulta. Se han descrito también déficits de las habilidades sociales y la empatía. La exposición prenatal al alcohol constituye la causa más frecuente de trastorno del neurodesarrollo adquirido y prevenible.


Subject(s)
Developmental Disabilities/diagnosis , Fetal Alcohol Spectrum Disorders/diagnosis , Animals , Chick Embryo , Developmental Disabilities/complications , Developmental Disabilities/physiopathology , Diagnostic Errors , Female , Fetal Alcohol Spectrum Disorders/physiopathology , Humans , Pregnancy , Prognosis , Social Behavior Disorders/etiology , Uncertainty
8.
J Crit Care ; 30(1): 138-44, 2015 Feb.
Article in English | MEDLINE | ID: mdl-25449882

ABSTRACT

PURPOSE: Resuscitated cardiac arrest (CA) patients typically receive therapeutic hypothermia, but arterial blood gases (ABGs) are often assessed after adjustment to 37°C (alpha-stat) instead of actual body temperature (pH-stat). We sought to compare alpha-stat and pH-stat assessment of PaO2 and PaCO2 in such patients. MATERIALS AND METHODS: Using ABG data obtained during the first 24 hours of intensive care unit admission, we determined the impact of measured alpha vs calculated pH-stat on PaO2 and PaCO2 on patient classification and outcomes for CA patients. RESULTS: We assessed 1013 ABGs from 120 CA patients with a median age of patients 66 years (interquartile range, 50-76). Median alpha-stat PaO2 changed from 122 (95-156) to 107 (82-143) mm Hg with pH-stat and median PaCO2 from 39 (34-46) to 35 (30-41) mm Hg (both P < .001). Using the categories of hyperoxemia, normoxemia, and hypoxemia, pH-stat estimation of PaO2 reclassified approximately 20% of patients. Using the categories of hypercapnia, normocapnia, and hypocapnia, pH stat estimation of PaCO2 reclassified approximately 40% of patients. The mortality of patients in different PaO2 and PaCO2 categories was similar for pH-stat and alpha-stat. CONCLUSIONS: Using the pH-stat method, fewer resuscitated CA patients admitted to intensive care unit were classified as hyperoxemic or hypercapnic compared with alpha-stat. These findings suggest an impact of ABG assessment methodology on PaO2, PaCO2 , and patient classification but not on associated outcomes.


Subject(s)
Body Temperature , Heart Arrest/blood , Hypercapnia/diagnosis , Hyperoxia/diagnosis , Adult , Aged , Arteries , Blood Gas Analysis , Female , Heart Arrest/mortality , Humans , Hypercapnia/blood , Hyperoxia/blood , Hypothermia, Induced , Hypoxia/blood , Hypoxia/complications , Intensive Care Units , Male , Middle Aged , Pilot Projects , Retrospective Studies
9.
Macromol Biosci ; 14(8): 1170-80, 2014 Aug.
Article in English | MEDLINE | ID: mdl-24799194

ABSTRACT

In the present study, plant oil-derived surface-modifiable polyurethane thermosets are presented. Polyol synthesis is carried out taking advantage of thiol-yne photopolymerization of undecylenic acid derivatives containing methyl ester or hydroxyl moieties. The prepared methyl ester-containing polyurethanes allow surface modification treatment to enhance their hydrophilicity and impart antimicrobial activity through the following two steps: i) grafting poly(propylene glycol) monoamine (Jeffamine M-600) via aminolysis and ii) Jeffamine M-600 layer complexation with iodine. The antimicrobial activity of the iodine-containing polyurethanes is demonstrated by its capacity to inhibit the growth of Staphylococcus aureus, and Candida albicans in agar media.


Subject(s)
Anti-Infective Agents/pharmacology , Candida albicans/drug effects , Polymers/chemical synthesis , Polyurethanes/chemical synthesis , Staphylococcus aureus/drug effects , Undecylenic Acids/chemistry , Anti-Infective Agents/chemistry , Candida albicans/growth & development , Iodine/metabolism , Iodine/pharmacology , Magnetic Resonance Spectroscopy , Microscopy, Electron, Scanning , Molecular Structure , Polymerization , Polymers/chemistry , Polymers/metabolism , Polyurethanes/chemistry , Polyurethanes/pharmacology , Propylene Glycols/metabolism , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization , Spectroscopy, Fourier Transform Infrared , Staphylococcus aureus/growth & development
10.
Macromol Biosci ; 13(5): 614-22, 2013 May.
Article in English | MEDLINE | ID: mdl-23460383

ABSTRACT

A set of thermoplastic polyurethanes is synthesized, combining undecylenic acid-derived telechelic diols as soft segments and 1,4-butanediol/4,4'-methylenebis(phenylisocyanate) as a hard segment (HS). These polymers are fully chemically and physically characterized by means of NMR and Fourier transform IR (FTIR) spectroscopy, size-exclusion chromatography (SEC), DSC, thermogravimetric analysis (TGA), tensile testing, and contact angle measurements. The obtained results reveal that both the molecular weight of the diol and the HS content greatly influence the physical and mechanical properties of these polymers. In addition, given the potential use of these materials for biomedical applications, hydrolytic degradation, their biocompatibility using a human fibroblast cell line, and performance as drug delivery carriers are evaluated.


Subject(s)
Materials Testing , Plastics/chemistry , Polyurethanes/chemistry , Polyurethanes/pharmacology , Temperature , Undecylenic Acids/chemistry , Undecylenic Acids/pharmacology , Calorimetry, Differential Scanning , Cell Death/drug effects , Fibroblasts/cytology , Fibroblasts/drug effects , Humans , Hydrolysis/drug effects , Molecular Weight , Plastics/chemical synthesis , Plastics/pharmacology , Polyurethanes/chemical synthesis , Solubility , Spectroscopy, Fourier Transform Infrared , Thermogravimetry , Undecylenic Acids/chemical synthesis
11.
Macromol Rapid Commun ; 32(17): 1343-51, 2011 Sep 01.
Article in English | MEDLINE | ID: mdl-21648006

ABSTRACT

Fast-degrading linear and branched polyanhydrides are obtained by melt-condensation of novel di- and tri-carboxylic acid monomers based on oleic and undecylenic acid synthesized using photoinitiated thiol-ene click chemistry. (1)H NMR spectroscopy, size exclusion chromatography, differential scanning calorimetry, thermogravimetric analysis, and FT-IR spectroscopy have been used to fully characterize these polymers. The hydrolytic degradation of these polymers was studied by means of weight loss, anhydride bond loss, and changes in molecular weight, showing fast degrading properties. Drug release studies from the synthesized polyanhydrides have also been conducted, using rhodamine B as a hydrophobic model drug, to evaluate the potential of these polymers in biomedical applications.


Subject(s)
Oleic Acids/chemical synthesis , Polyanhydrides/chemical synthesis , Undecylenic Acids/chemical synthesis , Carboxylic Acids/chemistry , Click Chemistry , Drug Carriers , Drug Liberation , Hydrolysis , Light , Molecular Weight , Photochemical Processes , Rhodamines/chemistry
12.
Biomacromolecules ; 11(6): 1646-53, 2010 Jun 14.
Article in English | MEDLINE | ID: mdl-20462176

ABSTRACT

The application of environmentally friendly thiol-ene chemistry to the preparation of biobased telechelics is presented in this work. This methodology is based on two one-pot photoinitiated thiol-ene click processes: step-growth polymerization using a 3,6-dioxa-1,8-octanedithiol and end-group postpolymerization modification with three functional thiols: 2-mercaptoethanol, 3-mercaptopropionic acid, and 3-mercaptopropyltrimethoxysilane. We applied this approach to a potentially 100% biomass-derived monomer, allyl ester of 10-undecenoic acid (UDA). To show the generality and scope of this methodology, a series of well-defined telechelics with molecular weight ranging from 1000-3000 g/mol and hydroxyl, carboxyl, or trimethoxysilyl groups at the polymer terminus were prepared. An exhaustive (1)H NMR and MALDI-TOF MS analyses demonstrates the highly end-group fidelity of this methodology being an interesting procedure for the accelerated preparation of telechelics derived from divinyl monomers. UDA-based thelechelic diol prepared using this methodology was reacted with 4,4'-methylenebis(phenylisocyanate) and 1,4-butanediol as the chain extender to obtain multiblock poly(ester urethane).


Subject(s)
Allyl Compounds/chemical synthesis , Castor Oil/chemistry , Fatty Acids, Monounsaturated/chemistry , Polyesters/chemical synthesis , Polyurethanes/chemical synthesis , Sulfhydryl Compounds/chemistry , Allyl Compounds/chemistry , Fatty Acids, Monounsaturated/isolation & purification , Magnetic Resonance Spectroscopy , Molecular Structure , Molecular Weight , Polyesters/chemistry , Polyurethanes/chemistry , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization , Undecylenic Acids
SELECTION OF CITATIONS
SEARCH DETAIL
...