FACTORS INFLUENCING THE MECHANICAL-BEHAVIOR OF RAW UNFILLED NATURAL-RUBBER

被引：22
|
作者：
CAMPBELL, DS
FULLER, KNG
机构：
来源：
RUBBER CHEMISTRY AND TECHNOLOGY | 1984年 / 57卷 / 01期
关键词：
D O I：
10.5254/1.3535987
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 influence of gel and soluble nonrubbers on the relaxation behavior of raw, bale NR (natural rubber) has been studied by testing fractionated and solvent-extracted rubber. The fractionation was carried out by progressive dissolution, each fraction being recovered by evaporation of the solvent. The tests were performed in tension for extensions up to 70%. The experiments have shown that gel and soluble nonrubbers have a marked influence on the relaxation behavior of NR. The gel has a predominantly stiffening effect: it produces a comparatively slight decrease of the rate of relaxation. Whether the gel is present as a macrogel phase or as individual microgel particles appears to be of secondary importance. The soluble nonrubbers, on the other hand, influence mainly the time variation of the relaxation modulus: at longer relaxation times they increase the rate of relaxation quite markedly.
引用
收藏
页码：104 / 117
页数：14
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