Double yielding in a styrene/butadiene star block copolymer

被引：41

作者：

Adhikari, R ^{[1
]}

Buschnakowski, M

Henning, S

Goerlitz, S

Huy, TA

Lebek, W

Godehardt, R

Michler, GH

Lach, R

Geiger, K

Kno, K

机构：

[1] Univ Halle Wittenberg, Dept Engn, D-06099 Halle An Der Saale, Germany

[2] Univ Stuttgart, Inst Polymer Technol, D-70199 Stuttgart, Germany

[3] BASF AG, D-67056 Ludwigshafen, Germany

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2004年 / 25卷 / 05期

关键词：

deformation behaviour; double yielding; mechanical properties; morphology; styrene/butadiene star block copolymer;

D O I：

10.1002/marc.200300186

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The morphology and tensile deformation behaviour of a highly asymmetric styrene/butadiene star block copolymer (polystyrene (PS) content = 74%) containing random PS-co-PB (polybutadiene) copolymer as a rubbery phase were investigated. The existence of double yielding, similar to that observed in some semicrystalline polymers, was detected in this nanostructured amorphous polymer. The observed phenomenon may be correlated with two different micromechanical processes taking place at the initial stage of deformation.

引用

页码：653 / 658

页数：6

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