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Synthesis and photo-curing properties of polyurethane acrylates with difunctional acrylate
Molecular Crystals and Liquid Crystals ( IF 0.7 ) Pub Date : 2020-07-23 , DOI: 10.1080/15421406.2020.1743443
Geon-Ho Noh 1 , Youngup Jin 1 , Seongkuk Bae 2 , Jae Hwan Chun 2 , Boo Young Jeong 2 , Kwon Taek Lim 3 , Won-Ki Lee 1
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Abstract Although a photo curing is more efficient in terms of time, solvent, and cost than a thermal one, photo-curable coatings require low viscosity and fast curing speed due to workability and time saving, respectively. A high viscous oligomer with multi-acryl groups is one of main components to determine its physical property after curing and then viscosity of coatings is controlled by adding a diluent. The polyurethane acrylates were newly synthesized by using ethylene diamine as a chain extender in poly(ε-caprolactone) polyol, dicyclohexylmethane 4,4′-diisocyanate, and isocyanato acrylate (ICA) containing diacrylate and diisocyanate groups. IR spectra were used to identify the synthesis and photo curing process. The mechanical properties of the cured films were analyzed by UTM. The results showed that the tensile strength of the UV-cured films was depended on the ICA content in the polyurethane acrylates.

中文翻译:

双官能丙烯酸酯聚氨酯丙烯酸酯的合成及光固化性能

摘要 尽管光固化在时间、溶剂和成本方面比热固化更有效,但由于可加工性和节省时间,光固化涂料分别需要低粘度和快速固化速度。具有多丙烯酸基团的高粘度低聚物是决定其固化后物理性能的主要成分之一,然后通过添加稀释剂来控制涂料的粘度。聚氨酯丙烯酸酯是通过在聚(ε-己内酯)多元醇、二环己基甲烷 4,4'-二异氰酸酯和含有二丙烯酸酯和二异氰酸酯基团的异氰酸酯基丙烯酸酯(ICA)中使用乙二胺作为扩链剂而新合成的。红外光谱用于鉴定合成和光固化过程。通过UTM分析固化膜的机械性能。
更新日期:2020-07-23
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