Study of the thermal stability and mechanical properties of some styrene-acrylonitrile copolymers

ABSTRACT

Copolymers of styrene and acrylonitrile were prepared with different compositions and were identified by infrared and nuclear magnetic resonance spectroscopic techniques. The triad sequence distribution of the prepared copolymers .was determined by 13[C-]nmr. Thermogravimetric analysis showed that the thermal stability of the copolymers are increased by increasing the acrylonitrile ratio. The mechanical measureanents showed that the tensile strength increases with the introduction of acrylonitrile groups into the copolymer chains