Polycarbonate microfoams with a smooth surface and higher notched impact strength

被引：38

作者：

Bledzki, AK

Kirschling, H

Steinbichler, G

Egger, P

机构：

[1] Univ Kassel, Inst Werkstofftech, D-34109 Kassel, Germany

[2] ENGEL AUSTRIA GmbH, Res & Dev, Schwertberg 4311, Switzerland

[3] ENGEL AUSTRIA GmbH, Long Fibre Proc Foaming Technol, Schwertberg 4311, Switzerland

来源：

JOURNAL OF CELLULAR PLASTICS | 2004年 / 40卷 / 06期

关键词：

polycarbonate; microfoam; gas counterpressure; surface roughness; impact property; morphology;

D O I：

10.1177/0021955X04048423

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Polycarbonate microfoams produced by physical blowing agents usually have an unacceptable surface quality. The surface is rough and the visual difference in the surface quality is striking. However, the surface quality can be improved by the gas counterpressure technology. Polycarbonate has a high elongation at break but a low notched impact strength. Earlier, the microfoams showed higher notched impact strength, but a considerably reduced elongation at break. Foams produced by the gas counterpressure technology have both these positive mechanical properties.

引用

页码：489 / 496

页数：8