Branched Versus Linear Polyisoprene: Flory-Huggins Interaction Parameters for their Solutions in Cyclohexane

被引：11

作者：

Eckelt, John ^{[1
,2
,3
]}

Samadi, Fatemeh ^{[1
,2
]}

Wurm, Frederik ^{[4
]}

Frey, Holger ^{[4
]}

Wolf, Bernhard A. ^{[1
,2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, Mat Wissensch Forschungszentrum, D-55099 Mainz, Germany

[3] WEE Solve GmbH, D-55130 Mainz, Germany

[4] Johannes Gutenberg Univ Mainz, Inst Organ Chem Organ & Macromol Chem, D-55099 Mainz, Germany

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2009年 / 210卷 / 17期

关键词：

branched; cyclohexane; Flory-Huggins interaction parameters; linear; molecular architecture; vapor pressure; INTRAMOLECULAR INTERACTION PARAMETERS; LIQUID PHASE-SEPARATION; STAR POLYMERS; SOLVENT QUALITY; CONCENTRATION-DEPENDENCE; SEMIDILUTE SOLUTIONS; ORDERING PHENOMENA; THETA-TEMPERATURE; BEHAVIOR; BLENDS;

D O I：

10.1002/macp.200900191

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

Flory-Huggins interaction parameters were determined as a function of composition for solutions of linear and of branched polyisoprene in cyclohexane (CH) at 25, 45, and 65 degrees C by means of vapor pressure measurements (moderate to concentrated solutions) and by vapor pressure osmometry (dilute solutions). The results demonstrate that CH is a considerably worse solvent for branched polyisoprene than for the linear analog at all temperatures and at all compositions. This observation corroborates the expectation based on a recent phenomenological approach, which accounts explicitly for the incapability of the segments of an individual polymer molecule to spread out over the entire volume of the system and for its ability to adjust its chain conformation to an altering molecular environment.

引用

页码：1433 / 1439

页数：7

共 46 条

[1]

Starches in semidilute aqueous solution [J].