Photopolymerizations of thiol-ene polymers without photoinitiators
Photopolymerizations of thiol-ene polymers without photoinitiators
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DOI：
10.1021/ma0200672
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发表时间：
2002-07-02
期刊：
影响因子：
5.5
通讯作者：
Bowman, CN
中科院分区：
文献类型：
--
作者：
Cramer, NB;Scott, JP;Bowman, CN
巯基单体可与乙烯醚、烯丙基、丙烯酸酯、甲基丙烯酸酯和乙烯苯单体共聚。这些硫醇烯聚合是光引发的，而不使用光引发剂分子。可以看出，与365 nm光相比，用254 nm光照射无引发剂样品更容易进行聚合。为了证明抗氧抑制，3-15微米的聚合物薄膜暴露在环境空气中聚合。没有光引发剂分子存在，光仅被单体和聚合物衰减。这一特点导致更大的紫外线穿透，并允许聚合极厚的聚合物。厚度可达25英寸。都是用巯基乙烯醚体系得到的。
A thiol monomer is shown to copolymerize with vinyl ether, allyl, acrylate, methacrylate, and vinylbenzene monomers. These thiol-ene polymerizations are photoinitiated without the use of photoinitiator molecules. It is seen that the polymerization proceeds more readily when initiatorless samples are irradiated with light centered around 254 nm as compared to 365 nm light. To demonstrate resistance to oxygen inhibition, thin polymer films of 3-15 mum are polymerized while exposed to ambient air. Without photoinitiator molecules present, light is attenuated only by the monomer and polymer. This feature leads to greater penetration of ultraviolet light and allows for the polymerization of extremely thick polymers. Thick cures of up to 25 in. are obtained using a thiol-vinyl ether system.