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Modification of Cross‐Linked Rubber Particles by Free Radical Polymerization
Author(s) -
Coiai Serena,
Passaglia Elisa,
Ciardelli Francesco,
Tirelli Diego,
Peruzzotti Franco,
Resmini Emiliano
Publication year - 2006
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.200650225
Subject(s) - azobisisobutyronitrile , polystyrene , polymerization , radical polymerization , polymer chemistry , polymer , styrene , natural rubber , materials science , chain transfer , chemical engineering , chemistry , copolymer , composite material , engineering
The synthesis of polystyrene chains covalently bound to the surface of cross‐linked rubber particles from recycled tires (ground tire rubber, GTR) was investigated via free radical polymerization in situ by using azobisisobutyronitrile (AIBN) and dibenzoyl peroxide (BPO) as initiators. Indeed, the graft polymerization provides a significant route to modify the physical and chemical properties of these particles allowing to improve their compatibility with other polymers. Polymerization reactions were carried out in bulk by changing the styrene/GTR ratio as well as the amount of free radical initiator. Appreciable amounts of polystyrene (PS) were grafted on GTR when BPO was used as confirmed by particle characterizations.