COMPARISON OF ROTATING FRAME SPIN RELAXATION AND SELF-DIFFUSION IN POLYETHYLENE AND POLY(ETHYLENE OXIDE) MELTS

被引：12

作者：

HUIRUA, TWM ^{[1
]}

WANG, R ^{[1
]}

CALLAGHAN, PT ^{[1
]}

机构：

[1] MASSEY UNIV, DEPT PHYS & BIOPHYS, PALMERSTON NORTH, NEW ZEALAND

来源：

MACROMOLECULES | 1990年 / 23卷 / 06期

关键词：

D O I：

10.1021/ma00208a017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The spectrum of rotating frame relaxation times (Γ1()) has been obtained for poly (ethylene oxide) (PEO) melts over a range of molar masses. Comparison with the Tlp spectrum for polyethylene (PE) indicates that the local motion anisotropy is considerably lower in PEO and that tube renewal occurs more rapidly. In both polymer melts» semilocal motion is observed to be approximately molar mass independent. Self-diffusion measurements in PE and PEO melts yield tube renewal time constants consistent with those measured directly via Tlp dispersions. © 1990, American Chemical Society. All rights reserved.

引用

页码：1658 / 1664

页数：7

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