摘要
添加活性稀释剂是调节光固化体系黏度、光固化反应速率、固化产物性能的有效手段。采用丙烯酸异辛酯(2-EHA)为活性稀释剂,利用实时红外(FT-IR)研究了活性稀释剂用量对双固化聚硅氧烷丙烯酸酯树脂(PSA)光聚合的影响。结果表明,稀释剂的加入不仅能改善体系的流变性能,同时稀释剂参与光聚合过程,提高体系的固化交联程度,改变交联网络,从而影响固化物的力学性能。通过红外跟踪研究了固化顺序(先光固化后湿气固化和先湿气固化后光固化)对体系中C=C双键和Si-OCH基团转化率的影响,结果表明,先光后湿的3固化顺序更有利于使体系达到高的转化率;DSC分析发现固化顺序对固化物玻璃化转变温度有一定影响。
The reactive diluents can adjust the viscosity and curing rate of the UV curing system and the performance of UV cured product. The influences of diluent contents on dual-curable polysiloxane acrylate resin （PSA） system photopolymerization were studied by FT-IR. The results showed that the addition of diluents not only improved the rheological properties of systems but participated in the photopolymerization process, enhanced the mechanical properties by increasing the crosslinking degree and modulating cross-linked network. Different curing sequences were investigated and the results showed that the variation of curing sequences had great influence on the conversion of double bonds （C=C） and methoxy groups （Si-OCH ）, and the moisture curing after UV exposure gave a relatively higher conversion. The curing3 product of different curing order was evaluated by DSC, and it was demonstrated that the curing sequences had a certain degree of influence on the glass transition temperature.
出处
《粘接》
CAS
2014年第10期35-38,共4页
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