硅烷偶联剂改性核壳丙烯酸酯乳液合成
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1.郑州大学 化工学院;2.北京高盟新材料股份有限公司

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TQ630

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Synthesis of core-shell acrylate emulsion modified by silane coupling agent
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1.School of Chemical Engineering of Zhengzhou University;2.Beijing Comens New Materials Co., Ltd.

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    摘要:

    以甲基丙烯酸甲酯(MMA)、苯乙烯(St)和丙烯酸丁酯(BA)为主单体,硅烷偶联剂为改性单体,制备出“软核硬壳”粒子的核壳结构丙烯酸酯乳液。设计结构,探究交联单体对乳液性能的影响。结果表明:当苯乙烯的质量分数为15%(以全部单体的总质量为基准,下同),核层与壳层的理论玻璃化温度(Tg)分别为-10 ℃和30 ℃,核层交联单体乙烯基三乙氧基硅烷(A-151)和壳层交联单体γ-甲基丙烯酰氧基丙基三甲氧基硅烷(A-174)的用量分别为3%和2%时,乳液的稳定性和成膜性较好。对比未加交联单体的均相粒子结构,核壳结构聚合物的最大热粘温度提高90 ℃,吸水率降低10.8%,热分解温度(质量损失5%)提高38 ℃,缓解了水墨涂层的高温回粘问题,提高了涂膜的耐水性和耐热性。

    Abstract:

    The core-shell acrylate emulsion was prepared with methyl methacrylate (MMA), styrene (St) and butyl acrylate (BA) as the main monomers and silane coupling agent as the modified monomers. The structure was designed and the influence of crosslinked monomer on the properties of emulsion was investigated in the study. The results showed that the stability and film formation of the emulsion were better when the amount of styrene is 15%(based on the total mass of all monomers, the same below), the theoretical glass temperature of the core layer and the shell layer were -10 ℃ and 30 ℃, and the amount of the core layer cross-linked monomer vinyltriethoxysilane (A-151) and the shell layer cross-linked monomer gamma-methacryloxy propyl trimethoxysilane (A-174) is 3% and 2%, respectively. Compared with the homogeneous particle structure without crosslinked monomer, the maximum thermal adhesion temperature of the core-shell structure polymer is increased by 90 ℃, the water absorption rate is reduced by 10.8%, and the thermal decomposition temperature (mass loss of 5%) is increased by 38 ℃, alleviating the high-temperature adhesion problem of ink coatings and improving the water and heat resistance of the coating film.

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丁帅帅,程相林,亓子怡,王小平.硅烷偶联剂改性核壳丙烯酸酯乳液合成[J].精细化工,2024,41(7):

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  • 收稿日期:2023-06-11
  • 最后修改日期:2023-08-28
  • 录用日期:2023-08-14
  • 在线发布日期: 2024-07-11
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