Morphological differences in semicrystalline polymers: Implications for local dynamics and chain diffusion

被引：60

作者：

Yao, Y-F. ^{[1
]}

Graf, R. ^{[1
]}

Spiess, H. W. ^{[1
]}

Lippits, D. R. ^{[2
]}

Rastogi, S. ^{[2
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Eindhoven Univ Technol, Dept Chem Engn, NL-5600 MB Eindhoven, Netherlands

来源：

PHYSICAL REVIEW E | 2007年 / 76卷 / 06期

关键词：

D O I：

10.1103/PhysRevE.76.060801

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Morphological differences in semicrystalline polymers due to different crystallization conditions have implications for the chain motion. The local dynamics in the noncrystalline regions of solution-crystallized linear polyethylene is lower than in a melt-crystallized sample, but the opposite is observed for chain diffusion between noncrystalline and crystalline regions. The activation enthalpy for chain diffusion, however, is the same, indicating that entropic differences in the noncrystalline regions strongly influence the chain diffusion of the same polymer in different morphologies.

引用

页数：4

共 25 条

[1] CONFORMATION OF CYCLIC PARAFFINS AND POLYETHYLENE IN THE SOLID-STATE AS STUDIED BY C-13 CP MAS NMR [J].