PHASE-BEHAVIOR OF POLY(ETHYLENE-1-BUTENE) IN SUBCRITICAL AND SUPERCRITICAL PROPANE - ETHYL BRANCHES REDUCE SEGMENT ENERGY AND ENHANCE MISCIBILITY

被引：36

作者：

CHEN, SJ ^{[1
]}

BANASZAK, M ^{[1
]}

RADOSZ, M ^{[1
]}

机构：

[1] EXXON RES & ENGN CO,ANNANDALE,NJ 08801

来源：

MACROMOLECULES | 1995年 / 28卷 / 06期

关键词：

D O I：

10.1021/ma00110a014

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

On the basis of experimental batch-cell data, increasing short-chain branch density is found to reduce the cloud-point pressure of poly(ethylene-1-butene) solutions in propane, by as much as a factor of 3. This trend is captured by a SAFT approximation via an effective segment energy that depends on the branch density. Increasing branch density is found to decrease the effective segment energy and, hence, to make it closer to that of propane, which is consistent with the enhanced miscibility of branchy poly(ethylene-1-butenes) in propane.

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页码：1812 / 1817

页数：6

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