1H T2-NMR monitoring of crosslinked polyolefin aging

被引：7

作者：

Harris, DJ ^{[1
]}

Assink, RA ^{[1
]}

Gillen, KT ^{[1
]}

机构：

[1] Sandia Natl Labs, Organ Mat Dept, Albuquerque, NM 87185 USA

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2003年 / 90卷 / 09期

关键词：

NMR; polyethylene (PE); polyolefins; degradation; irradiation;

D O I：

10.1002/app.12872

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This work examines the correlation between the H-1-NMR T-2 relaxation constant and the mechanical properties of aged crosslinked polyolefin cable insulation. T-2 experiments on unswollen samples could not differentiate between unaged and highly aged materials; all exhibited H-1 T-2 constants of approximately 0.5 ms. To accentuate the effects of aging, samples were swollen in various solvents. Unaged samples had T-2 values of approximately 15 ms in good solvents. With thermal aging, T-2 values decreased as the ultimate tensile elongation decreased. However, the correlation between T-2 and elongation differed for samples irradiated with high-energy radiation and for materials aged above versus below the crystalline melting temperature. (C) 2003 Wiley Periodicals, Inc.

引用

页码：2578 / 2582

页数：5

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