Synthesis of a Sulfur- bearing Secondary Antioxidant with High Molecular Weight and Its Antioxidation Behavior in EPDM

被引：0
|
作者：
Liu Q. [1 ]
Cong C. [1 ]
Meng X. [1 ]
Zhou Q. [1 ]
机构：
[1] College of New Energy and Materials, China University of Petroleum-Beijing, Beijing
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2023年 / 39卷 / 02期
关键词：
anti-migration properties; antioxidation performance; high-molecular-weight sulfur-bearing secondary antioxidant; thiol-ene click reaction;
D O I：
10.16865/j.cnki.1000-7555.2023.0027
中图分类号：
学科分类号：
摘要：
A novel high- molecular- weight sulfur- bearing secondary antioxidant, OVPOSS@MB, was synthesized by thermal- initiated thiol- ene click reaction of 2- mercaptobenzimidazole (MB) with octavinylsesquisiloxane (OVPOSS). The chemical structure of OVPOSS@MB was confirmed by Fourier transform infrared spectroscopy and X- ray photoelectron spectroscopy, and the effects of OVPOSS@MB on the vulcanization characteristics, tensile properties, and oxidation resistance of EPDM were investigated. The results show that OVPOSS@MB slows down the vulcanization rate and reduces the degree of cross- linking of rubber, which makes the OVPOSS@MB/EPDM composites exhibit lower rubber modulus and higher elongation at break. In addition, compared with the low- molecular- weight antioxidant MB, the high- molecular- weight antioxidant OVPOSS@MB has higher anti- migration properties, together with the free radical scavenging function of the OVPOSS lattice, making OVPOSS@MB have more excellent antioxidation performance than MB. © 2023 Chengdu University of Science and Technology. All rights reserved.
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页码：10 / 16
页数：6
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