γ IRRADIATION OF CARBOXYLATED STYRENE-BUTADIENE RUBBER LATEX

PENG Jing; ZHANG Xiaohong; QIAO Jinliang; WEI Genshuan

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γ IRRADIATION OF CARBOXYLATED STYRENE-BUTADIENE RUBBER LATEX

更新时间：2023-04-07

- γ IRRADIATION OF CARBOXYLATED STYRENE-BUTADIENE RUBBER LATEX
- Journal of Radiation Research and Radiation Processing Vol. 20, Issue 3, Pages: 171-177(2002)
- 作者机构：
  
  1.北京大学化学与分子工程学院应用化学研究所　北京　100871
  2.中国石化股份有限公司北京化工研究院　北京　100013
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PENG Jing, ZHANG Xiaohong, QIAO Jinliang, et al. γ IRRADIATION OF CARBOXYLATED STYRENE-BUTADIENE RUBBER LATEX. [J]. Journal of Radiation Research and Radiation Processing 20(3):171-177(2002)
DOI：

PENG Jing, ZHANG Xiaohong, QIAO Jinliang, et al. γ IRRADIATION OF CARBOXYLATED STYRENE-BUTADIENE RUBBER LATEX. [J]. Journal of Radiation Research and Radiation Processing 20(3):171-177(2002) DOI：

摘要

研究了以丙烯酸—2—乙基己酯（2—EHA）为交联敏化剂，γ辐照对羧基丁苯胶乳（CSBRL）的交联行为，粒径大小、分布以及化学结构和热性能的影响，并推测了CSBRL辐射硫化的反应机理。结果表明，剂量率对CSBRL的交联行为影响不大；随着吸收剂量增大，交联密度急剧增大，体积溶胀度迅速减小，交联点间平均分子量减小。交联密度还随着敏化剂用量增加而增大。动态光散射仪的测试表明，吸收剂量<25kGy时，胶乳的流体力学半径与辐照前相比变化不大，当吸收剂量增大到102kGy时，流体力学半径与辐照前相比稍有增加。显微傅立叶红外光谱证实CSBRL不仅被辐射交联，还接枝上了丙烯酸酯。DSC分析表明，未加敏化剂的CSBRL玻璃化温度随剂量增加变化不大，而加入3%敏化剂的CSBRL的DSC曲线变化很大。

Abstract

The crosslinking behavior of carboxylated styrene — butadiene rubber latex(CSBRL) by using gamma radiation with 2—ethyl hexyl acrylate(2—EHA) as crosslinking sensitizer has been studied in detail. In addition,the variation of the particle size and distribution of latex, chemical structure and thermal property of CSBRL with absorbed dose have been discussed. Also the radiation vulcanization mechanism of CSBRL has been suggested. The experiments showed that,the dose rate has small effect on the cross —link behavior of CSBRL,and the swelling ratio decreased rapidly with the increase of absorbed dose. Increasing the dose,the average molecular weight per crosslinked units(Mc) decreased and crosslinking density increased. When the dose is below 25kGy,no significant changes in the particle size and distribution of latex were observed. The micro—FTIR analysis and DSC curves confirmed the existence of grafting reaction accompanying the crosslinking reaction during the gamma irradiation with 2—EHA as sensitizer.

关键词

γ辐照羧基丁苯橡胶乳液交联结构

Keywords

γ rays irradiationCarboxylated styrene—butadiene rubber latexCrosslinking behaviorChemical structure

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Chongqing College of Electronic Engineering

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