Premium
Study of Grafting Reactions of Polar Groups onto Polystyrene (PS) by Reactive Mixing
Author(s) -
Passaglia Elisa,
Coiai Serena,
Ricci Lucia,
Ciardelli Francesco
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451407
Subject(s) - polystyrene , surface modification , grafting , polymer chemistry , azide , chemistry , reaction mechanism , degradation (telecommunications) , polar , photochemistry , organic chemistry , catalysis , polymer , telecommunications , physics , astronomy , computer science
Two different bulk modifications have been carried out aimed to the introduction of carboxyl groups into atactic polystyrene (PS) based on the reaction at 180°C with diethylmaleate (DEM) or 4‐carboxybenzensulfonyl azide (CBSA) respectively. The former system proceeds with a free radical mechanism giving functionalization around 0.5% by mol but with reduction of molecular weight and T g increase. On the other side CBSA which grafts by addition to the C‐H bond gives appreciable functionalization with rather limited degradation and moderate T g increase. Detailed analysis of the molecular structure of the functionalized PS was performed to propose possible reaction mechanisms.