Preparation of Styrene-Maleic Anhydride Random Copolymer by Stabilizer-Free Dispersion Polymerization

被引：20

作者：

Guo, Xiaoyue ^{[1
]}

Ma, Yuhong ^{[1
]}

Chen, Dong ^{[2
]}

Peng, Wei ^{[2
]}

Yang, Wantai ^{[1
,2
]}

机构：

[1] Beijing Univ Chem Technol, Key Lab Carbon Fiber & Funct Polymers, Minist Educ, Beijing 100029, Peoples R China

[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY | 2012年 / 49卷 / 12期

关键词：

Styrene; maleic anhydride; dispersion copolymerization; random copolymerization; VINYL-ACETATE; C-13; NMR; MICROSPHERES;

D O I：

10.1080/10601325.2012.728482

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this paper, random copolymer of styrene (St) and maleic anhydride (MAH) were prepared by stabilizer-free dispersion polymerization, with dicumyl peroxide (DCP) as initiator and ethyl butyrate as solvent at 120 degrees C. The microsphere morphology and sequential structure of the copolymers were characterized by SEM and 13C-NMR, respectively. When the molar feed ratio of MAH to St (MAH/St) was 20/80, the overall MAH content in the copolymer was about 26% (molar) from the 13C-NMR spectrum, and the three St-centred triads SSS, MSS+SSM, and MSM were about 41%, 44%, and 15%, respectively. The variation of sequential structure of the copolymer on the changes of the polymerization time is marginal. When the feed ratio of MAH/St was less than 15/85, it was observed that the obtained copolymer could be partially dissolved in the solvent. The molecular weight of the soluble fraction was smaller than that of the precipitation part. The effects of feed ratios of MAH to St, the initiator concentrations, and monomer concentrations on polymerization yields and compositions of the copolymer were investigated in detail. The results showed that a stable dispersion of SMA random copolymer particles was formed when the feed ratio MAH/St=20/80.

引用

页码：1061 / 1069

页数：9

共 28 条

[1]

Atsushi T., 1980, [No title captured], Patent No. [EP 0027274, 0027274]

[2]

Backhouse A.J., 1983, [No title captured], Patent No. [EP 0031997 (B1), 0031997]

[3] APPLICATIONS OF DEPT EXPERIMENTS TO THE C-13 NMR OF COPOLYMERS - POLY(STYRENE-CO-MALEIC ANHYDRIDE) AND POLY(STYRENE-CO-ACRYLONITRILE) [J].