Poly(methyl methacrylate-co-styrene)/silicate nanocomposites synthesized by multistep emulsion polymerization

被引：7

作者：

Choi, YS ^{[1
]}

Kim, YK ^{[1
]}

Chung, IJ ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea

来源：

MACROMOLECULAR RESEARCH | 2003年 / 11卷 / 06期

关键词：

poly(methyl methacrylate-co-styrene); core-shell structures; silicate; nanocomposite; emulsion polymerization;

D O I：

10.1007/BF03218970

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Exfoliated poly(methyl methacrylate-co-styrene) [P(MMA-co-ST)]/silicate nanocomposites were synthesized through a multistep emulsion polymerization. The methyl methacrylate monomers were polymerized first and then the styrene monomers were polymerized. The nanocomposites had core-shell structures consisting of PMMA (core) and PS (shell); these structures were confirmed by H-1 NMR spectroscopy and TEM, respectively. P(MMA-co-ST) copolymers showed two molecular weight profiles and two glass transition temperatures (T-g) in GPC and DMA measurements. At 30 degreesC, the nanocomposites exhibited 83 and 91% increases in their storage moduli relative to the neat copolymer because the silicate layers were dispersed uniformly in the polymer matrix.

引用

页码：418 / 424

页数：7

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