|本期目录/Table of Contents|

[1]仝少凯,岳艳芳,冯展威,等.端羧基液体丁腈酯橡胶的合成及增韧环氧树脂的力学性能[J].合成橡胶工业,2024,1:77.
　TONG Shao-kai,YUE Yan-fang,FENG Zhan-wei,et al.Synthesis of carboxyl-terminated liquid nitrile-butadiene-butylacrylate rubber and mechanical properties of toughening epoxy resin[J].China synthetic rubber industy,2024,1:77.
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端羧基液体丁腈酯橡胶的合成及增韧环氧树脂的力学性能(PDF)

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

期数:
2024年1期
页码:
77
栏目:
出版日期:
2024-01-15

文章信息/Info

Title:
Synthesis of carboxyl-terminated liquid nitrile-butadiene-butylacrylate rubber and mechanical properties of toughening epoxy resin
文章编号:
1000-1255（2024）01-0072-05
作者:
仝少凯1; 岳艳芳1; 冯展威2; 贺剑云2; 范卫锋2
1.中国石油川庆钻探工程有限公司 长庆井下技术作业公司，西安 710018；2.中国科学院 长春应用化学研究所/高性能合成橡胶及其复合材料重点实验室，长春130022
Author(s):
TONG Shao-kai1;  YUE Yan-fang1;  FENG Zhan-wei2;  HE Jian-yun2 *;  FAN Wei-feng2 *
1. Changqing Downhole Technology Company, CNPC Chuanqing Drilling Engineering Co Ltd, Xi′an 710018, China; 2. Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials/Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
关键词:
端羧基液体丁腈酯橡胶; 四元共聚; 环氧树脂; 增韧; 力学性能
Keywords:
-
分类号:
-
DOI:
DOI:10.19908/j.cnki.ISSN1000-1255.2024.01.0077
文献标识码:
-
摘要:
采用乳液聚合法，加入丁二烯、丙烯腈、丙烯酸丁酯和甲基丙烯酸甲酯四种单体，通过四元共聚合成出端羧基液体丁腈酯橡胶（CTBNB）并用其增韧环氧树脂。傅里叶变换红外光谱与核磁共振波谱的表征均证实了CTBNB的成功合成，其羧基摩尔分数为3.6%。加入10份（质量，下同） CTBNB可全面提升环氧树脂E 51的拉伸强度、扯断伸长率及冲击强度；加入15份可使其冲击强度较未加入者提高259%，达到明显增韧效果。
Abstract:
Carboxyl-terminated liquid nitrile rubber (CTBN) has been extensively studied for toughening modification of epoxy resin due to its good compatibility and telechelic polymer nature, allowing the carboxyl groups to react with the epoxy groups［1-2］. Carboxyl-terminated liquid nitrile-butadiene-butylacrylate rubber (CTBNB) is a modified variety of CTBN, and its flexible ester functional groups can act as plasticizers and improve the low-temperature and heat resistance of polymer chains.　In this study, we first report the synthesis of CTBNB and its toughening modification on E 51 epoxy resin. The emulsifier used in the polymerization process was a combination of potassium abietate and sodium dodecyl sulfate, with a mass ratio of 3/3/3/1 for butadiene, acrylonitrile, butyl acrylate and methyl methacrylate monomers. CTBNB was prepared through quaternary copolymerization. As shown in Fig 1, compared to nitrile-butadiene-butylacrylate rubber (BNBR), CTBNB exhibits a characteristic peak of methyl methacrylate at chemical shift 1.1 by 1H-NMR, with a calculated carboxyl mole fraction of 3.6%. Additionally, in the FTIR of CTBNB in Fig 2, apart from the characteristic peaks of nitrile and ester groups, there is a distinct carboxyl hydrogen peak at 3 300 cm-1. These findings indicate the successful preparation of CTBNB.The synthesized CTBNB was subsequently blended with E 51 epoxy resin at varying amounts of 0, 10, 15 phr respectively, followed by pre-polymerization at 100 ℃. After cooling, the curing agent methylhexahydrophthalic anhydride and curing catalyst tris(dimethylaminomethyl) phenol were introduced. Vacuum degassing was performed prior to casting the mixture into a mold for subsequent curing at 160 ℃. The mechanical properties are presented as Table 1. The addition of 10 phr CTBNB significantly enhances the tensile strength, elongation at break and impact strength of the composite material. Furthermore, with a higher concentration of 15 phr CTBNB, the impact strength reaches an impressive value of 30.11 kJ/m2, representing a remarkable increase of 259% compared to its original value. This can be attributed to the presence of flexible ester groups that act as plasticizers and rubber particles that disperse and absorb significant amounts of energy during deformation, thereby improving the toughness of the resin.

参考文献/References

［1］ Neves R M, Ornaghi Jr H L, Zattera A J, et al. Toughening epoxy resin with liquid rubber and its hybrid composites: A systematic review ［J］. Journal of Polymer Research, 2022, 29(8): 340.［2］ Bian Xingming, Tuo Rui, Yang Wei, et al. Mechanical, thermal, and electrical properties of BN-Epoxy composites modified with carboxyl-terminated butadiene nitrile liquid rubber ［J］. Polymers, 2019, 11(10): 1548.

备注/Memo

备注/Memo:
Supported by Chuanqing Drilling Company′s Technology Research Project （CQ 2022 B-Z-164-4）.
更新日期/Last Update: 1900-01-01