Anisotropic nature of open volume "defects" in highly crystalline polymers

被引：10

作者：

Bamford, D ^{[1
]}

Jones, M ^{[1
]}

Latham, J ^{[1
]}

Hughes, RJ ^{[1
]}

Alam, MA ^{[1
]}

Stejny, J ^{[1
]}

Dlubek, G ^{[1
]}

机构：

[1] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

来源：

MACROMOLECULES | 2001年 / 34卷 / 23期

关键词：

D O I：

10.1021/ma0109121

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We assess the size and shape of the free volume holes in crystalline polyethylene fibers (crystallinity similar to 85%) via the measurements of confinement momenta of parapositronium trapped within these holes. The holes show considerable anisotropy and a shape that is compatible with those created by chain folds buried in the crystal lattice. We estimate their sizes to be similar to8 and 5 Angstrom in two perpendicular directions. These are also compatible with those argued from the lattice parameter and other geometrical considerations.

引用

页码：8156 / 8159

页数：4

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