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《合成橡胶工业》[ISSN:1000-1255/CN:10-2023/TQ]

期数:

2023年6期

页码:

457-464

栏目:

出版日期:

2023-11-15

文章信息/Info

Title:

Calculation of stress-strain relationship of chlorinated polyethylene rubber/nitrile rubber blend by regulating cross-linking density of chlorinated polyethylene rubber phase

文章编号:

1000-1255（2023）06-0457-08

作者:

孙臻豪; 邓 涛

青岛科技大学 高分子科学与工程学院，山东 青岛 266042

Author(s):

SUN Zhen-hao;  DENG Tao

School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

关键词:

氯化聚乙烯橡胶; 丁腈橡胶; 机械共混法; 硫化胶; 平衡溶胀法; 交联密度; 拟合模型; 力学性能

Keywords:

chlorinated polyethylene rubber;  nitrile rubber;  mechanical blending;  vulcanizate;  equilibrium swelling method;  cross-linking density;  fitting model;  mechanical property

分类号:

TQ 333.7

DOI:

DOI:10.19908/j.cnki.ISSN1000-1255.2023.06.0457

文献标识码:

A

摘要:

以氯化聚乙烯橡胶（CM）和丁腈橡胶（NBR）为主要原料，采用机械共混法制备了CM/NBR共混硫化胶，通过改变CM/NBR共混硫化胶中CM相硫化体系的用量并采用平衡溶胀法、力学性能测试、理论计算等手段表征了CM/NBR共混硫化胶中CM相的交联密度及CM/NBR共混硫化胶的应力-应变关系，研究了CM相交联密度变化对CM/NBR共混硫化胶中两相定伸应力匹配程度和力学性能的影响。结果表明，由CM相交联密度增加所引起CM/NBR共混硫化胶定伸应力的变化大于CM相本身的定伸应力变化；随着定伸应力的增加，CM相交联密度变化对CM/NBR共混硫化胶定伸应力的影响增大；通过CM/NBR共混硫化胶中CM相和NBR相应力-应变关系的对比和CM/NBR共混硫化胶力学性能的变化验证了CM相交联密度的降低是两相定伸应力逐渐匹配的过程；与测试的应力-应变关系相比，采用拟合模型预测的共混硫化胶应力-应变关系的误差相对较小，表明此法具有一定的适用性。

Abstract:

Chlorinated polyethylene rubber (CM)/nitrile rubber (NBR) blend vulcanizates were prepared by mechanical blending method with CM and NBR as main raw materials, the cross-linking density of CM phase in CM/NBR blend vulcanizate and the stress-strain relationship of CM/NBR blend vulcaizate were characterized by regulating the dose of vulcanization system of CM phase in CM/NBR blend combined with the means of equilibrium swelling method, testing mechanical properties and theoretical calculation, and the influence of the change of cross-linking density of CM phase on matching degree of the modulus of two phase in CM/NBR blend vulcanizate and mechanical properties of CM/NBR blend vulcanizate were studied. The results showed that the change of the modulus of CM/NBR blend vulcanizate caused by the increase in cross-linking density of CM phase was greater than that of its own; with the increase of modulus, the influence of the change of cross-linking density of CM phase on the modulus of CM/NBR blend vulcanizate increased; by comparing the stress-strain relationship of CM phase and NBR phase in CM/NBR blend vulcanizate and the change of mechanical properties of CM/NBR blend vulcanizate, it was proved that the decrease of the cross-linking density of CM phase was a process of the gradual matching of the modulus of the two phase; compared with the error of the measured stress-strain relation, that of the stress-strain relationship predicted by fitting model was relatively smaller, which indicated that fitting model had certain applicability.

参考文献/References

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更新日期/Last Update: 2023-11-15