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Effect of Initiator on the Incorporation of Graphite into Polymer Matrix During Suspension Polymerization
Author(s) -
Lopes Cristiane N.,
Moreira Regina F. P. M.,
Machado Ricardo A. F.,
Araújo Pedro H. H.
Publication year - 2005
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.200551109
Subject(s) - benzoyl peroxide , graphite , polymerization , suspension polymerization , polymer chemistry , polystyrene , peroxide , radical initiator , chemistry , reactivity (psychology) , bifunctional , polymer , radical polymerization , radical , decomposition , materials science , organic chemistry , catalysis , medicine , alternative medicine , pathology
Summary: The incorporation of graphite into polystyrene (PS) particles produced by suspension polymerization was studied using a monofunctional and a bifunctional initiator, benzoyl peroxide (BPO) and 2,5‐dimethyl‐2,5‐bis(2‐ethyl hexanoyl peroxide) hexane (L256), respectively. The results showed that the polymerization rate was affected by graphite concentration when BPO was used as the initiator while no such effect was observed for L256. Results also showed that the incorporation of graphite in the PS particles was higher when using BPO than when using L256. Molecular weight distribution showed that during the reaction with BPO and graphite oligomers were formed indicating that the free radicals generated by the decomposition of BPO presented a very high reactivity with the functional groups present at the graphite surface while no significant effect was observed for the reaction with L256.