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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Castor oil based hyperbranched urethane acrylates and their performance as UV-curable coatings
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Castor oil based hyperbranched urethane acrylates and their performance as UV-curable coatings

机译：基于蓖麻油的超支化聚氨酯丙烯酸酯及其作为紫外线固化涂层的性能

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摘要

Castor oil (CO) based hyperbranched urethane acrylates (HBUAs), namely C10-IH and C20-IH, were synthesized by modifying the hydroxyl groups of first (C10)- and second (C20)-generation of CO-based hyperbranched polyesters with isocyanate-bearing semi-adducts (IPDI-HEA). Herein, the C10 and C20 polyesters were prepared using the renewable CO as a B_3 core molecule and dimethylolpropionic acid as an AB_2 monomer via a pseudo-one-pot condensation procedure. For comparison, a CO-based urethane acrylate (CO-IH) was synthesized by directly modifying the hydroxyl groups of CO with IPDI-HEA. The structure-property relationship of the UV-cured films was investigated in detail. Consequently, the number of terminal urethane acrylates greatly influenced their final properties. The tensile strength of the C20-IH based UV-cured sample could be improved by 129% in comparison with the CO-IH based sample, and its pencil hardness reached up to 7H. Furthermore, the chemical resistance tests and the morphology study proved that the C20-IH based UV-cured coatings exhibited excellent chemical stability and superb microstructure. These improvements can be attributed to the unique oligomer architecture that combined the structural features of hyperbranching, castor oil chains and multiple urethane acrylates.
机译：基于蓖麻油（CO）的超抗菌氨基甲酸酯丙烯酸酯（HBUA），即C10-IH和C20-IH，通过用异氰酸酯改性Co-Bri基超支化聚酯的第二（C20）的羟基（C20） - 和第二种（C20）的再生合成 - 用于半加合物（IPDI-HEA）。在此，使用可再生CO作为B_3核心分子和二甲基丙烯酸作为AB_2单体制备C10和C20聚酯作为AB_2单体。为了比较，通过直接改性CO与IPDI-HEA的羟基来合成Co基氨基甲酸酯丙烯酸酯（CO-IH）。研究了UV固化膜的结构性质关系。因此，末端氨基甲酸酯丙烯酸酯的数量极大地影响了它们的最终性质。与基于CO-IH的样品相比，C20-IH基紫外固化样品的拉伸强度可以提高129％，其铅笔硬度达到7小时。此外，耐化学性试验和形态学研究证明了基于C20-IH的紫外线固化涂层表现出优异的化学稳定性和优异的微观结构。这些改进可以归因于组合超支化，蓖麻油链和多种氨基甲酸酯丙烯酸酯的结构特征的独特低聚物结构。

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  • 作者

    Daidong Wei; Bing Liao; Qiwen Yong; Tao Li; Huiyi Wang; Jianheng Huang; Hao Pang;

  • 作者单位

    Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou China;

    Guangdong Academy of Sciences Guangzhou China;

    Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou China;

    Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou China;

    Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou China;

    Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou China;

    Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化学（高聚物）;
  • 关键词

    UV-curing; hyperbranched urethane acrylate; castor oil; coatings; chemical resistance;

    机译：UV固化;超支化氨基甲酸酯丙烯酸酯;蓖麻油;涂料;耐化学性;

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