DIRECT MICROSCOPIC OBSERVATION OF THE ENTANGLEMENT DISTANCE IN A POLYMER MELT

被引：113

作者：

RICHTER, D

FARAGO, B

FETTERS, LJ

HUANG, JS

EWEN, B

LARTIGUE, C

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE

[2] EXXON RES & ENGN CO, ANNANDALE, NJ 08801 USA

[3] MAX PLANCK INST POLYMER RES, W-6500 MAINZ, GERMANY

[4] HAHN MEITNER INST KERNFORSCH BERLIN GMBH, W-1000 BERLIN, GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.64.1389

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using neutron spin-echo spectroscopy and rheometry, we investigated the melt dynamics of poly(ethylene-propylene) alternating copolymers. The experiments show that beyond a certain length scale the relaxation of density fluctuations within a given chain is strongly reduced. The presence of this intermediate dynamic length scale implies the existence of a well-defined entanglement distance confirming the essential assumption of the reptation concept. Its value is found to be in excellent agreement with the entanglement distance obtained from the rheological measurement. © 1990 The American Physical Society.

引用

页码：1389 / 1392

页数：4

共 22 条

[1]

[Anonymous], 1974, ENTANGLEMENT CONCEPT

[2]

[Anonymous], 1980, VISCOELASTIC PROPERT

[3] GENERALIZATION OF KRAMERS-KRONIG TRANSFORMS AND SOME APPROXIMATIONS OF RELATIONS BETWEEN VISCOELASTIC QUANTITIES [J].