THERMODYNAMICS OF POLY(ETHYLENE OXIDE)-POLY(VINYL ACETATE) BLENDS

被引：28

作者：

YIN, JH

ALFONSO, GC

TURTURRO, A

PEDEMONTE, E

机构：

[1] UNIV GENOA,IST CHIM IND,I-16132 GENOA,ITALY

[2] ACAD SINICA,CHANGCHUN INST APPL CHEM,CHANGCHUN 130022,PEOPLES R CHINA

[3] CNR,CTR STUDI CHIM FIS MACROMOLEC,I-16132 GENOA,ITALY

来源：

POLYMER | 1993年 / 34卷 / 07期

关键词：

MISCIBILITY; POLY(ETHYLENE OXIDE); POLY(VINYL ACETATE); CORRESPONDING STATE THEORY; HEAT OF MIXING;

D O I：

10.1016/0032-3861(93)90863-6

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Heat-of-mixing data, obtained on blends of poly(ethylene oxide) (PEO) with whole and fractionated poly(vinyl acetate) (PVAc), were used to feed Patterson's theory of polymer-polymer miscibility. Negative values of mixing enthalpy, contact-energy term, interaction'' parameter and excess volume were obtained only for blends with the lowest molecular weight PVAc fraction. These results show that miscibility of PVAc with PEO strongly depends on its molecular weight. The calculated unfavourable excess volume term of the Patterson equation is small in comparison with the absolute value of the interaction term. Therefore, miscibility of PEO and low-molecular-weight PVAc is dictated by the weak specific interactions between different repeat units and by the entropic gain in the mixing process.

引用

页码：1465 / 1470

页数：6

共 28 条

[21]

PRIGOGINE I, 1957, MOLECULAR THEORY SOL, pCH16

[22] PROBING THE STRUCTURE OF POLYMER BLENDS BY VIBRATIONAL SPECTROSCOPY - THE CASE OF POLY(ETHYLENE OXIDE) AND POLY(METHYL METHACRYLATE) BLENDS [J].