Effect of Lanthanum Cysteine on Vulcanization Properties of Natural Rubber

被引：0

作者：

Zhang W. ^{[1
]}

Liu Z. ^{[1
]}

Li S. ^{[1
]}

Hao W. ^{[1
]}

Hu Y. ^{[1
]}

Wu J. ^{[1
]}

机构：

[1] School of Materials and Metallurgy, Inner Mongolia University of Science & Technology, Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources Ministry of Education, Inner Mongolia Key Laboratory of Rare Eart, Baotou

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2022年 / 40卷 / 03期

关键词：

Activation energy; Natural rubber; Rare earths; Vulcanization accelerator;

D O I：

10.11785/S1000-4343.20220315

中图分类号：

学科分类号：

摘要：

A new environmentally friendly accelerator lanthanum cysteine(La-Cys)was synthesized by complex decomposition method using lanthanum chloride and cysteine as raw materials to study its effect on the vulcanization characteristics and mechanical properties of natural rubber (NR). The product was characterized by elemental analysis, thermal analysis and FT-IR analysis, and its molecular formula was determined as La(C3H7NO2S)3 Cl3•3H2O. The effects of La-Cys on the vulcanization characteristics, crosslink density and physical and mechanical properties of natural rubber were tested by rotorless vulcanization apparatus, equilibrium swelling method and universal testing machine. The results showed that the physical and mechanical properties of natural rubber were effectively improved by the addition of accelerator La-Cys. In addition, the best vulcanization promotion effect on natural rubber was achieved when the addition amount of La-Cys was 1 phr, and it could effectively prolong the scorch time and ensure the processing safety of the rubber. Through further kinetic calculations, it was found that the reactivity of the cross-linked precursors increased and the activation energy decreased with the increase of La-Cys addition. © 2022, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.

引用

页码：484 / 492

页数：8

共 16 条

[1]

Alam M N, Mandal S K, Debnath S C., Bis(N-benzyl piperazino) thiuram disulfide and dibenzothiazyl disul-fide as synergistic safe accelerators in the vulcanization of natural rubber, J. Appl. Polym. Sci, 126, 6, (2012)

[2]

Zheng W, Jia Z X, Zhang Z, Yang W, Zhang L Q, Wu S Z., Improvements of lanthanum complex on the thermal-oxidative stability of natural rubber, J. Ma-ter. Sci, 51, 19, (2016)

[3]

Zheng W, Liu L, Zhao X Y, He J W, Wang A, Chan T W, Wu S Z., Data for effects of lanthanum complex on the thermo-oxidative aging of natural rubber, Polym. Degrad. Stab, 120, (2015)

[4]

Chen C H, Lin X H, Liu Q T, Wang D Z., Application of Curing Accelerator-O, O'-dioctyl-praseodymium di-thiophosphate to NR, Special Purpose Rubber Prod-ucts, 28, 2, (2007)

[5]

Wang Y Q., Preparation of Rare Earth Accelerant and its Application in Rubber, (2010)

[6]

Ellis B, Welding G N., Estimation, from swelling, of the structural contribution of chemical reactions to the vulcanization of natural rubber. Part II. Estimation of equilibrium degree of swelling, Rubber Chem. Tech-nol, 37, 2, (1964)

[7]

Bawendi M G, Freed K F., Systematic corrections to Flo-ry-Huggins theory: Polymer-solvent-void systems and bi-nary blend-void systems, J. Chem. Phys, 88, 4, (1988)

[8]

Gaidadin A N, Safronov S A, Navrotskii M Y, Nav-rotskii V A, Kutsov D A, Kharlamov V O., Assessing the structure of thermoplastic elastomers by the equilib-rium swelling method, Int. Polym. Sci. Technol, 43, 1, (2016)

[9]

Yu J, Li M X., Preparation and synergistic properties of lanthanum sorbate composite thermal stabilizer, Journal of the Chinese Society of Rare Earths, 37, 6, (2019)

[10]

Hui R H, Guan C X, Hou D Y., Study on the infrared spectroscopy characteristics of carboxylic acids and their salts, Journal of Anshan Teachers College, 3, 1, (2001)

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