END UNIT EFFECT ON THE GLASS-TRANSITION TEMPERATURE OF LOW-MOLECULAR-WEIGHT POLYMERS AND COPOLYMERS

被引：53

作者：

DANUSSO, F ^{[1
]}

LEVI, M ^{[1
]}

GIANOTTI, G ^{[1
]}

TURRI, S ^{[1
]}

机构：

[1] AUSIMONT SPA,CTR RIC SVILUPPO,BOLLATE,ITALY

来源：

POLYMER | 1993年 / 34卷 / 17期

关键词：

FLUORINATED POLYMERS; OLIGOMERS; GLASS TRANSITION; END GROUPS; COPOLYMERS;

D O I：

10.1016/0032-3861(93)90054-E

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Experimental results for five series of linear oligomers of different molecular weights, having a common perfluorinated molecular body and five different pairs of equal foreign end units, generally demonstrate the substantial influence of the chemical nature of the end units on the T(g-x) relation of polymers and copolymers, with progressive evidence when the molecular weight is lowered. Positive or negative deviations from the body T(g) asymptotic value are observed with different types of end units. Previous experimental results and theoretical expectations for the T(g) at low x values are reviewed briefly. As a first approximation, the applicability of the simplest two-parameter T(g)-x equations to the new results is discussed, as well as the situation when x is translated in terms of end copolymeric composition.

引用

页码：3687 / 3693

页数：7

共 40 条

[1] PHYSICAL PROPERTIES OF VINYL POLYMERS .1. DEPENDENCE OF THE GLASS-TRANSITION TEMPERATURE OF POLYMETHYLMETHACRYLATE ON MOLECULAR WEIGHT [J].