Page 100 - 《橡塑技术与装备》2023年7期

橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT

作为硫化温度，DCP 在该硫化温度下活性较低，DCP
含量越高，共混胶的硫化程度越低。但该共混胶在热
氧老化过程中以分子链交联反应为主，完善了交联网
络，故老化后共混胶的常温拉伸强度整体相当，拉伸
强度变化率逐渐变小 ；共混胶拉断伸长率变化率变化
较为复杂。

图 11 老化后共混胶拉断伸长率变化率

提高共混胶的常温拉伸强度，改善共混胶的耐高温性
能。
（3）热氧老化后，共混胶的常温拉伸性能整体相
当，但高温拉伸下，拉伸强度和拉断伸长率下降明显。
（4）未加入 TMTD 的共混胶，老化后高温拉伸，
图 10 老化后共混胶拉伸强度变化率
拉伸强度可达 6.09 MPa，拉断伸长率可达 230%。

3 结论 参考文献 ：
通过调控硫载体（TMTD）和过氧化物（DCP） [1] 刘登样 . 橡胶及橡胶制品 [M]. 北京 : 化学工业出版社 ,2005.
[2] 唐斌，李晓强，王进文 . 乙丙橡胶应用技术 [M]. 北京 : 化学
的比例，随着 TMTD 用量的增加，
工业出版社，2005.
（1）共混胶的硫化速度逐渐加快，t 90 逐渐减小， [3] 朱玉俊 . 介绍一种新型弹性体材料 —— 聚烯烃弹性体 (POE)
但加入 2 份 TMTD 时，共混胶的 t 90 反而略微延长。 [J]. 化工新型材料，1998(10):20-22+30.
[4] To B H. Effect of amines on reversion of NR compounds[J].
（2）热氧老化前，可大幅度提高共混胶的模量，
Plastic Rubber Processing and Application, 1989,12(2):89.

Effect of crosslinking network on the aging and high temperature
resistance of EPDM/POE blended rubbered rubber

1
2
Gong Weiying , Zhang Yong , Deng Tao *
(1.Qingdao University of Science and Technology, Qingdao 266042, Shandong, China;
2. Luohe Litong Hydraulic Technology Co. LTD., Luohe 462000, Henan, China)

Abstract: By adjusting the ratio of sulfur carrier (TMTD) and peroxide (DCP), the changes of cross-linking
network structure during vulcanization and thermo oxidative aging of EPDM rubber/polyolefin elastomer (POE)
blended rubbered rubber was studied, and the effects of the changes on the tensile mechanical behavior
of the blended rubbers at room temperature and high temperature before and after thermo oxidative aging
were studied. Research has shown that the addition of sulfur carrier TMTD can significantly shorten the t 90 of the
blended rubber, but when the amount of TMTD added is 2 parts, it slightly prolongs the t 90 . At the same time,
with the addition of TMTD, the modulus of the blended rubber can be significantly increased before thermal
oxygen aging. Under normal temperature stretching conditions, the tensile strength of the blended rubber

7
·46· 第 49 卷 第 期