Properties of UV-heat cured films of polyurethane-modifiedepoxy monoacrylates

LIU Hongbo; ZHANG Wuying; LIN Feng; HE Tao

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Properties of UV-heat cured films of polyurethane-modifiedepoxy monoacrylates

更新时间：2023-03-27

- Properties of UV-heat cured films of polyurethane-modifiedepoxy monoacrylates
- Journal of Radiation Research and Radiation Processing Vol. 29, Issue 5, Pages: 275-279(2011)
- 作者机构：
  
  1.深圳职业技术学院化生学院精材系　深圳　518055
  2.中科院广州化学所广东省电子有机聚合物重点实验室　广州　510650
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LIU Hongbo, ZHANG Wuying, LIN Feng, et al. Properties of UV-heat cured films of polyurethane-modifiedepoxy monoacrylates. [J]. Journal of Radiation Research and Radiation Processing 29(5):275-279(2011)
DOI：

LIU Hongbo, ZHANG Wuying, LIN Feng, et al. Properties of UV-heat cured films of polyurethane-modifiedepoxy monoacrylates. [J]. Journal of Radiation Research and Radiation Processing 29(5):275-279(2011) DOI：

摘要

合成了聚氨酯改性丙烯酸环氧单酯，树脂分子结构中同时具有光固化基团（双键）和热固化基团（环氧基团）。用FTIR表征了光－热固化过程特征吸收峰的变化。研究了不同的稀释剂、热固化剂对光固化和光－热混杂固化的凝胶率、吸水率、力学性能和热性能的影响，结果表明：光固化膜的凝胶率低于89%，而光－热混杂固化膜的凝胶率在97%左右。在相同稀释剂条件下，与丙烯酸环氧单酯光－热固化体系相比，聚氨酯改性丙烯酸环氧单酯光－热固化膜的断裂强度下降，而断裂伸长率由4.9％提高到8.0%。光－热固化膜的热分解温度都在230℃以上。

Abstract

A new type of polyurethane-modified epoxy monoacrylates (PMEMA) was synthesized. The resins contained both UV-curable groups (C=C) and heat-curable groups (epoxy). Different UV-curable liquid compositions were developed with different kinds of active diluents. The change of absorption peaks of double bond and epoxy group were identified by FTIR spectra during UV-heat curing process. The gel content, water absorption, mechanical and thermal characteritics of the UV cured films and UV-heat cured films were investigated. The gel contents of UV cured films were lower than 89%, and the gel contents of UV-heat cured films were about 97%. Compared to the epoxy monoacrylates (EMA) systems with same active diluents, the breaking strength of UV-heat cured films of PMEMA system decreased, but its relative elongation increased from 4.9% to 8.0%. The first decomposition temperature of UV-heat cured films was over 230℃.

关键词

紫外光固化热固化聚氨酯改性丙烯酸环氧单酯

Keywords

UV-curableHeat-curablePolyurethaneModificationEpoxy monoacrylates

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1(School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen 518055, China) 2(Shenzhen Public Service Technology Platform for Polymer Materials Modification & Processing,,)

Shanghai Institute of Applied Physics, Chinese Academy of Sciences

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Shanghai Normal University

Guangdong Key Laboratory of Polymer Materials for Electronics, Guangzhou Institute of Chemistry, Chinese Academy of Sciences

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