Visible light curing of bisphenol-A epoxides and acrylates photoinitiated by (η6-benzophenone)(η5-cyclopentadienyl) iron hexafluorophosphate
Visible light curing of bisphenol-A epoxides and acrylates photoinitiated by (η6-benzophenone)(η5-cyclopentadienyl) iron hexafluorophosphate
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DOI：
10.1007/s10965-010-9547-5
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发表时间：
2011-11-01
影响因子：
2.8
通讯作者：
Wang, Tao
中科院分区：
文献类型：
--
作者：
Chen, Yu;Li, GuangLei;Wang, Tao
用近红外光谱法研究了六氟磷酸铁（Fc-BP）光引发双酚A型环氧二缩水甘油醚（DGEBA）齐聚物和丙烯酸酯单体的可见光固化。FC-BP在丙烯酸酯单体的自由基光聚合中表现出高效率，即使不存在叔胺。然而，在相同的光源下，二苯甲酮没有表现出任何光引发能力。Fc-BP也可用于光引发DGEBA的阳离子聚合。过氧化苯甲酰作为光敏剂时，DGEBA的光聚合速率明显增加，诱导期缩短。通过引入一定量的脂环族环氧单体ERL 4221作为活性稀释剂，消除了DGEBA阳离子聚合初期的诱导期。然而，当使用ERL 4221时，最终环氧转化率降低。
Visible light curing of diglycidyl ether of bisphenol-A (DGEBA) epoxy oligomer and acrylate monomers photoinitiated by (eta(6)-benzophenone)(eta(5)-cyclopentadienyl) iron hexafluorophosphate (Fc-BP) under a halogen lamp were studied by near infrared spectroscopy. Fc-BP exhibited high efficiency in the radical photopolymerization of acrylate monomers, even without the presence of tertiary amines. Under the same light source, however, benzophenone did not show any photoinitiating ability. Fc-BP could also be used to photoinitiate the cationic polymerization of DGEBA. There was an obvious increase in the photopolymerization rate of DGEBA and a decrease in the induction period when benzoyl peroxide was used as a photosensitizer. The induction period at the beginning of DGEBA cationic polymerization was eliminated by introducing a certain amount of cycloaliphatic epoxy monomer ERL4221 as an active diluent. However, the final epoxy conversion was decreased when ERL4221 was used.