EFFECTS OF GRAFTED VINYL TRIETHOXY SILANE ON MOISTURE CROSSLINKED EPDM

IF 1.2 4区工程技术 Q4 POLYMER SCIENCE

Rubber Chemistry and Technology Pub Date : 2021-07-19 DOI:10.5254/RCT.21.78982

Zhengwei Lin, Haotian Zhao, Yanlu Chen, Jie Mao, M. Hoch, Xinyan Shi

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引用次数: 4

Abstract

An EPDM terpolymer grafted with silane vinyl triethoxysilane (EPDM-g-VTES) was prepared by melt grafting, with dicumyl peroxide (DCP) as an initiator. Next, dibutyl tin dilaurate was added as a catalyst to promote moisture crosslinking of EPDM-g-VTES. By means of the rheological response of the rubber compound, Fourier transform infrared spectroscopy, and moving die rheometer, the VTES graft ratio and DCP partial crosslinking (pre-crosslinking) of EDPM-g-VTES were characterized to show the feasibility of moisture crosslinking. The mechanical properties of moisture crosslinked EPDM-g-VTES specimens were tested by universal material tester. The results showed that when the weight ratio of VTES to DCP was fixed at 15:1, the VTES graft ratio and DCP partial crosslinking of EDPM-g-VTES increased with the increase of VTES content. But the torque in the moisture crosslinking curve of EPDM-g-VTES increased significantly with the extension of crosslinking time, which proved that EPDM grafted with VTES was cured by moisture successfully. The tensile strength and elongation at break of EPDM-g-VTES were improved by moisture cure. Furthermore, the moisture cured specimen with 3 wt% VTES had the best mechanical performance.

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接枝乙烯基三乙氧基硅烷对湿交联EPDM的影响

采用熔融接枝法制备了硅烷乙烯基三乙氧基硅烷三元共聚物(EPDM-g- vtes)，过氧化二氨基苯(DCP)为引发剂。其次，加入二酸二丁基锡作为催化剂，促进EPDM-g-VTES的水交联。通过橡胶胶料的流变响应、傅里叶变换红外光谱和移动模流变仪对eddm -g-VTES的VTES接枝率和DCP部分交联(预交联)进行表征，证明了湿交联的可行性。采用通用材料试验机对湿交联EPDM-g-VTES试样的力学性能进行了测试。结果表明，当VTES与DCP的重量比固定为15:1时，EDPM-g-VTES的VTES接枝率和DCP部分交联随VTES含量的增加而增加。但随着交联时间的延长，EPDM-g-VTES的水分交联曲线上的扭矩显著增加，证明接枝了VTES的EPDM是成功的水分固化。湿固化提高了EPDM-g-VTES的抗拉强度和断裂伸长率。其中，掺3wt % VTES的湿固化试样力学性能最好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rubber Chemistry and Technology 工程技术-高分子科学

CiteScore

3.50

自引率

20.00%

发文量

审稿时长

3.6 months

期刊介绍： The scope of RC&T covers: -Chemistry and Properties- Mechanics- Materials Science- Nanocomposites- Biotechnology- Rubber Recycling- Green Technology- Characterization and Simulation. Published continuously since 1928, the journal provides the deepest archive of published research in the field. Rubber Chemistry & Technology is read by scientists and engineers in academia, industry and government.