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PMMA/Zinc Oxide Nanocomposites Prepared by In‐Situ Bulk Polymerization
Author(s) -
Demir Mustafa M.,
Memesa Mine,
Castignolles Patrice,
Wegner Gerhard
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500870
Subject(s) - materials science , polymerization , nanocomposite , thermal stability , zinc , methyl methacrylate , polymer , thermal decomposition , polymer chemistry , chemical engineering , composite number , oxide , radical polymerization , nanoparticle , composite material , chemistry , organic chemistry , nanotechnology , engineering , metallurgy
Summary: Dispersing surface‐modified zinc oxide nanoparticles (ZnO) in methyl methacrylate (MMA) improves the free radical bulk polymerization process as well as the thermal stability of the formed polymer. Hydroxy groups available on the ZnO surface may induce a degenerative transfer. This suppresses the gel effect, which leads to a better control of the heat evolution during the late stages of polymerization. The formation of chains having vinylidene end groups and head‐to‐head links is suppressed, which shifts the onset of thermal decomposition to the regime where decomposition occurs by random chain scission.Thermal degradation profiles of PMMA and its composite with ZnO at 11 wt.‐%.