DEGREE OF BRANCHING OF THE HYPERBRANCHED POLYMERS RESULTED FROM AB2 POLYCONDENSATION WITH SUBSTITUTION EFFECT

被引：10

作者：

Zhou, Zhi-ping ^{[1
]}

Yan, De-yue ^{[2
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

来源：

CHINESE JOURNAL OF POLYMER SCIENCE | 2011年 / 29卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Degree of branching; Polycondensation; Hyperbranched polymers; Substitution effect; MEAN-SQUARE RADIUS; ONE-STEP SYNTHESIS; AB MONOMERS; POLYMERIZATION; POLYESTERS; COPOLYMERIZATION; MOLECULES; GYRATION;

D O I：

10.1007/s10118-011-1064-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The analytical expressions of the various structural units and the average degree of branching for the hyperbranched polymers resulted from AB(2) polycondensation with substitution effect were derived by the kinetic mechanism. The reactivity difference between the B group in linear unit and that in terminal group has great effect on the molecular parameters of the products obtained. The concentration of terminal units has a maximum with the increase of the conversion of A groups (x). The higher the reactivity ratio (r) of linear B group to branched one is, the later the maximum appears and the larger it is. The degree of branching of the hyperbranched polymers obtained is controllable by adjusting the parameters of r and x, which increases with increasing both x and r.

引用

页码：569 / 574

页数：6

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