Graft copolymerization of styrene onto ethylene-vinyl p-nitrobenzoate copolymer by chain transfer reaction

✍ Scribed by Shigeo Nakamura; Hideo Kasatani; Kei Matsuzaki

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 445 KB
• Volume: 33
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1987.070330119

✦ Synopsis

The effect of steric hindrance on the attack of growing polymer radicals to the reaction sites on a trunk polymer was examined in the graft copolymerization of styrene onto a trunk polymer with pendant aromatic nitro groups by chain transfer reaction of growing polymer radicals to the pendant nitro groups. The nitro groups on ethylene-vinyl p-nitro benzoate copolymer (EVNB) are more effectively utilized in the graft copolymerization than thaw on the vinyl p-nitro benzoate homopolymer (PVNB) previously &I as a trunk polymer, because the nitro groups are distributed less frequently on the trunk polymer in the former than in the latter. This was also c o n h e d by the higher chain transfer constant of growing polystyrene radicals to EVNB compared to that of PVNB.