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《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:

2023年3期

页码:

204-209

栏目:

出版日期:

2023-05-15

文章信息/Info

Title:

Carboxylated nitrile rubber with high strength and toughness based on metal coordination bonds from tetravalent zirconium cation and carboxyl group

文章编号:

1000-1255（2023）03-0204-06

作者:

朱绍伊; 乔云河; 刘英俊; 杜爱华?鄢

青岛科技大学 高分子科学与工程学院/橡塑材料与工程教育部重点实验室，山东 青岛 266042

Author(s):

ZHU Shao-yi;  QIAO Yun-he;  LIU Ying-jun;  DU Ai-hua

School of Polymer Science and Engineering/Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China

关键词:

羧基丁腈橡胶; 锆离子（Ⅳ）; 金属配位键; 力学性能; 增强; 增韧

Keywords:

carboxylated nitrile rubber;  tetravalent zirconium cation;  metal coordination bond;  mechanical property;  strengthening;  toughening

分类号:

TQ 333.7

DOI:

DOI:10.19908/j.cnki.ISSN1000-1255.2023.03.0204

文献标识码:

B

摘要:

基于羧基丁腈橡胶（XNBR）中的羧基与Zr4+的配位作用，将ZrOCl2·H2O、硫黄及其他硫化剂与XNBR共混后进行热压硫化，制备了高强高韧的XNBR。结果表明，在硫黄交联的XNBR网络中形成了Zr4+-羧基金属配位键；随着ZrOCl2·H2O用量的增加，硫化胶的拉伸强度、300%定伸应力和断裂能显著提高；当Zr4+与XNBR中羧基的物质的量之比为1/8时，硫化胶的拉伸强度、300%定伸应力和断裂能分别为不含Zr4+硫化胶的250%、400%和250%。究其原因主要是当硫化胶受到拉伸时，Zr4+-羧基金属配位键作为弱键会优先于共价键断裂，在此过程中耗散了大量的能量，从而显著提高了胶料的拉伸强度和韧性。

Abstract:

Based on the coordination interaction between carboxyl group of carboxylated nitrile rubber (XNBR) and Zr4+ from ZrOCl2·H2O, after XNBR was blended with ZrOCl2·H2O, sulfur and other cu-ring agents followed by hot-pressing, XNBR with high strength and toughness was prepared. The results showed that Zr4+-carboxyl group metal coordination bonds formed in the XNBR network crosslinked with sulfur. The tensile strength, modulus at 300% and fracture energy of the vulcanizates were significantly improved with the increase in the addition amount of ZrOCl2·H2O, and when the mole ratio of Zr4+ to carboxyl group of XNBR was 1/8, tensile strength, modulus at 300%, and fracture energy of the vulcanizate were 250%, 400% and 250% of the vulcanizate without Zr4+. The reason was mainly that when the vulcanizate was stretched, Zr4+-carboxyl group metal coordination bond as weak bond would break prior to the covalent bond, and during this process enormous energy was dissipated and therefore tensile strength and toughness of the vulcanizate improved.

参考文献/References

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更新日期/Last Update: 1900-01-01