Influence of a long-side-chain-containing reactive diluent on the structure and mechanical properties of UV-cured films

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• 作者：Lu Shen ; Ying Wang ; Qiang Zhao ; Fubin Luo ; Junhua Chen ; Mangeng Lu ; Liyan Liang ; Kun Wu and Jun Shi
• 刊名：Polymer International
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：65
• 期：10
• 页码：1150-1156
• 全文大小：766K
• ISSN：1097-0126

文摘

The dimethacrylate reactive diluent (HEMA-DDSA), a long-side-chain-containing reactive diluent, was prepared by reacting 2-dodecen-1-ylsuccinic anhydride with two equivalents of hydroxyethyl methacrylate. Its structure was characterized by IR and ¹H NMR spectroscopy. This new diluent was added into the formulation of UV-curable epoxy acrylate networks. Results show that the formulation with the addition of HEMA-DDSA has massively reduced viscosity and shows several attractive properties of epoxy acrylate oligomers. The mechanical resistance of the films is dramatically enhanced with the incorporation of long alkyl groups derived from HEMA-DDSA, the plastic deformation zone expands, thus decreasing the inner stress of the polymer structure. Moreover, the cured coatings have a higher glass transition temperature as the percentage of HEMA-DDSA is increased up to 5 wt%. Due to the excellent integrated performance of the polymeric films, HEMA-DDSA proved to be an effective reactive diluent, which is of potential interest for applications in high performance materials.