Effect of Epoxy Content on Properties of Isoprene Rubber/Epoxidized Eucommia Ulmoides Gum Blend

被引：0

作者：

Li C. ^{[1
]}

Yang F. ^{[1
,2
]}

Li L. ^{[1
,2
]}

Fang Q. ^{[1
,2
]}

机构：

[1] School of Material Science and Engineering, Shenyang University of Chemical Technology, Shenyang

[2] Key Laboratory of Rubber Elastomers of Liaoning Province, Shenyang University of Chemical Technology, Shenyang

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2022年 / 38卷 / 05期

关键词：

Aggregated structure; Epoxidation; Eucommia ulmoides gum; Isoprene rubber; Rolling resistance; Wet skid resistance;

D O I：

10.16865/j.cnki.1000-7555.2022.0092

中图分类号：

学科分类号：

摘要：

Firstly, epoxidized eucommia ulmoides gums (EEUG) with different epoxy contents were prepared, and the filler- free compound formula was used for vulcanization. The effects of epoxy content on the vulcanization characteristics, crystal structure, static and dynamic mechanical properties of isoprene rubber (IR)/EEUG blends were studied. DSC, POM and AFM were used to analyze the aggregated structure of EEUG, the crystal structure and phase structure of IR/EEUG. The results show that the critical epoxy molar fraction of EEUG from crystalline structure to amorphous structure is 21.0%. Tiny crystals were observed in the 90IR/10EEUG-14.3 vulcanizate. As the dosage of EEUG-14.3 increases, the tensile strength and elongation at break of IR/EEUG-14.3 decrease. With the epoxy content increasing, the tensile strength and elongation at break of 90IR/10EEUG increase, and 90IR/10EEUG-21.0 shows the optimum tensile properties. EEUG-21.0 is in the critical state of transformation from crystalline structure to amorphous structure, which is prone to strain induced crystallization. Moreover, the entanglement between EEUG and IR molecules can induce the strain-induced crystallization of IR. The existence of EEUG increases the tanδ at 0℃ and reduces tanδ at 60℃ of IR vulcanizate, indicating that EEUG with appropriate epoxy content can improve the wet skid resistance and rolling resistance of IR at the same time. © 2022, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：50 / 57

页数：7

共 11 条

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