Correlation between morphology and mechanical properties of different styrene/butadiene triblock copolymers: A scanning force microscopy study

被引：39

作者：

Adhikari, R

Godehardt, R

Lebek, W

Weidisch, R

Michler, GH ^{[1
]}

Knoll, K

机构：

[1] Univ Halle Wittenberg, Inst Mat Sci, D-06099 Halle An Der Saale, Germany

[2] BASF AG, Polymers Lab, D-67056 Ludwigshafen, Germany

来源：

JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS | 2001年 / B40卷 / 05期

关键词：

morphology; mechanical properties; SB block copolymer; scanning force microscopy (SFM);

D O I：

10.1081/MB-100107564

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]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

The morphology of different styrene/butadiene (SB) block copolymers with triblock architectures was investigated using tapping mode scanning force microscopy (SFM). Comparative analysis of the morphology of the samples at the polymer/substrate interface of solution-cast films and in bulk was performed. It was found that, besides the total phase volume ratio, the interfacial structure between the incompatible chains determines the phase morphology and mechanical properties of the investigated block copolymers. The asymmetric SBS triblock copolymer (phi (PS) (74 vol%) forms, as expected, a cylindrical morphology with hexagonally packed polybutadiene (PB) cylinders in the polystyrene (PS) matrix. Depending on the interfacial structure, block configuration, and the hard/soft phase ratio, other triblock copolymers (phi (PS) ( 74 vol% and 65 vol%) show lamellae and randomly distributed PS cylinders in a random styrene/butadiene copolymer S/B matrix, respectively.

引用

页码：833 / 847

页数：15

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