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Preparation and characterization of UV-curable hyperbranched polyurethane acrylate

机译：紫外光固化超支化聚氨酯丙烯酸酯的制备与表征

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摘要

A series of UV-curable hyperbranched polyurethane acrylate (HBPUA) oligomers were synthesized with isophorone diisocyanate (IPDI), hyperbranched polyester Boltorn H20 (HBP) and hydroxy-ethyl acrylate (HEA). The structure of HBPUA oligomers was characterized by Fourier transform infrared (FTIR) spectroscopy, H nuclear magnetic resonance ('H-NMR) spectroscopy, and gel permeation chromatography (GPC). The UV-curing kinetics of HBPUA films with Darocur 1173 were investigated, and their heat resistance and mechanical properties (including hardness, adhesion force, flexibility, and impact strength) were measured. The results show that the HBPUA oligomers have superior photosensitivity and the percent conversion of C=C reaches 81 % when radiation time is 43 s. The heat resistance of the cured films decreased slightly with the increase in the content of the urethane-acrylate terminal group. Moreover, the mechanical properties of the cured films were influenced by the content of the OH group in HBP that reacted with the first NCO group of IPDI. When the content was 60%, the cured film had excellent overall properties. The hardness, flexibility, adhesion force, and impact strength were 4 H, 2 mm, 0 grade, and 47 kg cm, respectively.
机译：用异佛尔酮二异氰酸酯（IPDI），超支化聚酯Boltorn H20（HBP）和丙烯酸羟乙酯（HEA）合成了一系列UV可固化的超支化聚氨酯丙烯酸酯（HBPUA）低聚物。 HBPUA低聚物的结构通过傅里叶变换红外（FTIR）光谱，H核磁共振（'H-NMR）光谱和凝胶渗透色谱（GPC）进行表征。研究了具有Darocur 1173的HBPUA膜的UV固化动力学，并测量了其耐热性和机械性能（包括硬度，粘附力，柔韧性和冲击强度）。结果表明，当辐射时间为43 s时，HBBPA低聚物具有优异的光敏性，C = C的转化率达到81％。随着氨基甲酸酯-丙烯酸酯端基含量的增加，固化膜的耐热性略有降低。此外，固化膜的机械性能受与IPDI的第一个NCO基团反应的HBP中OH基团含量的影响。当含量为60％时，固化膜具有优异的总体性能。硬度，柔韧性，粘附力和冲击强度分别为4 H，2 mm，0级和47 kg cm。

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  • 来源
    《JCT》 |2011年第1期|p.61-66|共6页
  • 作者

    Qiongzhi Gao; Hongqiang Li; Xingrong Zeng;

  • 作者单位

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China,College of Science, South China Agricultural University,Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

    College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;

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  • 正文语种 eng
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  • 关键词

    UV-curable; hyperbranched polyester; urethane acrylate;

    机译：可紫外线固化超支化聚酯氨基甲酸酯丙烯酸酯;

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