Pyrolysis of polyacrylonitrile and related polymers—VII: Copolymers of acrylonitrile with acrylate, methacrylate and styrene type monomers

✍ Scribed by N. Grassie; R. McGuchan

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 656 KB
• Volume: 8
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(72)90046-8

✦ Synopsis

Al~tract--Thermai analysis of copolymers of acrylonitrile containing up to 20 per cent of acrylate and methaerylate units shows that these units exert a diluent effect on the exothermic nitrile group oligomerization without inhibiting the reaction. Thus these comonomers participate in the cyclization reaction which is able to pass through the comonomer unit. Comonomers with styrene-type structures behave differently, exerting a marked inhibiting effect on the nitrile reaction. The nitrile reaction is blocked at the comonomer unit and the radical activity is transferred to the comonomer unit in a chain-breaking process. The amount of nitrile group oligomerization is therefore much less in the styrene copolymers than in the acrylate and methacrylate systems.