Structural relaxation of polymers at the glass transition:: Conformational memory in poly(n-alkylmethacrylates) -: art. no. 155702

被引：56

作者：

Wind, M ^{[1
]}

Graf, R ^{[1
]}

Heuer, A ^{[1
]}

Spiess, HW ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.91.155702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Conformational memory is introduced as a new aspect of structural relaxation of polymers. In poly(n-alkylmethacrylates) extended backbone chain conformations are identified by advanced NMR techniques as the molecular units involved in structural relaxation. They retain conformational memory over many steps of restricted axial chain motion. Randomization of conformation and isotropization of backbone orientation occur on the same time scale, yet much slower than the slowest relaxation process identified so far. Behavior typical of fragile glass formers is found for this new process of chain relaxation.

引用

页数：4

共 29 条

[1] FORMATION OF GLASSES FROM LIQUIDS AND BIOPOLYMERS [J].