|本期目录/Table of Contents|

[1]杨 玥,田晓慧,孙金煜,等.用丙烯腈接枝改性脱蛋白天然胶乳及其自修复性能[J].合成橡胶工业,2023,4:297-303.
　YANG Yue,TIAN Xiao-hui,SUN Jin-yu,et al.Graft modification of deproteinized natural rubber latex with acrylonitrile and its self-healing property[J].China synthetic rubber industy,2023,4:297-303.
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用丙烯腈接枝改性脱蛋白天然胶乳及其自修复性能(PDF)

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

期数:
2023年4期
页码:
297-303
栏目:
出版日期:
2023-07-15

文章信息/Info

Title:
Graft modification of deproteinized natural rubber latex with acrylonitrile and its self-healing property
文章编号:
1000-1255（2023）04-0297-07
作者:
杨 玥; 田晓慧; 孙金煜; 元以中
华东理工大学 材料科学与工程学院，上海 200237
Author(s):
YANG Yue;  TIAN Xiao-hui;  SUN Jin-yu;  YUAN Yi-zhong
School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
关键词:
脱蛋白天然橡胶; 丙烯腈; 丙烯酸; 乳液接枝共聚; 力学性能; 氢键自修复
Keywords:
deproteinized natural rubber;  acrylonitrile;  acrylic acid;  emulsion graft copolymerization;  mechanical property;  hydrogen bond self-hea-ling
分类号:
TQ 332.5
DOI:
DOI:10.19908/j.cnki.ISSN1000-1255.2023.04.0297
文献标识码:
A
摘要:
采用乳液接枝共聚法，以脱蛋白天然橡胶（DPNR）为基体，丙烯腈（AN）和丙烯酸（AA）为单体，在叔丁基过氧化氢/四乙烯五胺引发体系下，合成了DPNR接枝AN和AA共聚物[DPNR-g-P（AN-co-AA）]。通过红外光谱、核磁共振波谱等验证了AN及AA单体的接枝，研究了单体总量及m（AN）/m（AA）对改性DPNR力学性能的影响，以及修复条件对其自修复性能的影响。结果表明,在单体总量为10份（以干胶质量计）、m（AN）/m（AA）为10/1的条件下，DPNR-g-P(AN-co-AA)的最大拉伸强度和扯断伸长率分别为9.22 MPa和1 365%，分别是初始DPNR的376%和133%。此外，体系中聚丙烯酸链段间的氢键相互作用使得DPNR-g-P（AN-co-AA）兼具优异的自修复性能，在50 ℃时愈合2 h可达到75.3%的自修复效率。
Abstract:
The copolymer of deproteinized natural rubber (DPNR) grafted acrylonitrile (AN) and acrylic acid (AA) [DPNR-g-P(AN-co-AA)] was synthesized by emulsion grafting copolymerization, using DPNR as matrix, AN and AA as monomers in the initiation system of tert-butyl hydroperoxide and tetra-ethylenepentamine. The grafting of AN and AA monomers was verified by infrared spectroscopy and nuclear magnetic resonance spectroscopy, and the effects of total monomers amount and m(AN) / m(AA) on the mechanical properties of modified DPNR were studied, as well as the effect of healing conditions on its self-healing property. The results showed that under the conditions of a total monomer amount of 10 phr (in terms of dry rubber mass) and m(AN) / m(AA) of 10/1, the maximum tensile strength and elongation at break of DPNR-g-P(AN-co-AA) were 9.22 MPa and 1 365%, respectively, which were 376% and 133% of the initial DPNR. In addition, the hydrogen bond interaction between polyacrylic acid segments in the system enabled DPNR-g-P(AN-co-AA) to have excellent self-healing property, reaching a self-healing efficiency of 75.3% after 2 h of healing at 50 ℃.

参考文献/References

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备注/Memo

备注/Memo:
中央高校基本科研业务费资助项目（22 A 201514002）。
更新日期/Last Update: 1900-01-01