摘要
合成了系列的Ｏ－酰单肟酮类自由基光敏引发剂。分别用ＵＶ和ＮＭＲ表征了它们的结构。并采用ＤＳＣ法测试和探讨了ＵＶ照射聚合中的影响因素。研究结果表明，光致引发剂的结构、用量及紫外光照射强度等对ＵＶ光照固化聚合均有一定影响。
A series of diphenyl-ketoximes photoinitiaters have been synthesized.Its struature was characterized by UV and NMR respectively. The influence of various factors on UV polymerization was studied by the method of DSC.The research results show that the structure and concentration of initiators and the UV-light intensity have the significant influence to the photopolymerization of unsaturated systems. Under the ideal UV-light intensity and the initiator concentration, the t_(ind) of DMPA is obviously lower than that of Oacetyl-or O-benzoylmonooximes. Therefore, DMPA is a good initiator for UV-light photopolymerization. And beacuse the carbonyl group of benzilmonooxime derivates can conjugate with the near benzenering, the breaking energy of C-C bond is lower (the absorption wavelength shifts to the right ,and λ_(max)=250￣260 nm). But diacetylmonooxime derivates have not conjugated double band, the wavelength of them is therefore shorter (λ_(max)=220￣230 nm). This shows that the initiated effect of benzilmonooximes is higher than that of diacetylmonooximes.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1994年第4期23-27,共5页
Polymer Materials Science & Engineering
关键词
酰单肟酮
光敏引发剂
高聚物
s:UV-photopolymerization, differentialscattering calorimetry (DSC), induction peried, polymerization heat .
