PMMA/zinc oxide nanocomposites prepared by in-situ bulk polymerization

被引:183
作者
Demir, Mustafa M. [1 ]
Memesa, Mine [1 ]
Castignolles, Patrice [1 ]
Wegner, Gerhard [1 ]
机构
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
关键词
composites; free radical polymerization; gel effect; nanoparticles; poly(methyl methacrylate); thermal degradation;
D O I
10.1002/marc.200500870
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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.
引用
收藏
页码:763 / 770
页数:8
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