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首页> 外文期刊>Polymers for advanced technologies >Synthesis and photoinitiating behavior of hyperbranched polymeric photoinitiators bearing coinitiator amine
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Synthesis and photoinitiating behavior of hyperbranched polymeric photoinitiators bearing coinitiator amine

机译：含共引发剂胺的超支化聚合物光引发剂的合成及光引发行为

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摘要

A series of benzo phenone (BP)-terminated hyperbranched polyester (BoltornTM P1000), bearing amine moieties as synergists by reacting with piperidine, were synthesized as yellowish liquids with low viscosity, and used as polymeric photoinitiators (HPPIs). For comparison, acrylate groups were introduced to the terminals of hyperbranched polyester for obtaining a polymerizable photoinitiator. The chemical structures were characterized by FTIR and 1H NMR spectroscopy. HPPIs and BP exhibited the similar absorptions by UV-vis spectroscopy. The photoinitiating behavior of HPPIs with trimethylolpropane triacrylate (TMPTA) as a trifunctional monomer was investigated by using photo DSC analysis. The results indicated that the maximum photopolymerization rate and unsaturation conversion of TMPTA initiated by HPPIs were both lower than that by BP. Among them, the HPPI with double tertiary amine moiety of BP moiety was found to be the most efficient photoinitiator. Additionally, the films cured with bisphenol A epoxy acrylate EB605 initiated by HPPIs were uniform and possessed high T_g from DMTA.
机译：一系列以苯甲酮（BP）为末端的超支化聚酯（BoltornTM P1000），通过与哌啶反应，具有胺部分作为增效剂，被合成为低粘度的淡黄色液体，并用作聚合光引发剂（HPPI）。为了比较，将丙烯酸酯基团引入到超支化聚酯的末端，以获得可聚合的光引发剂。化学结构通过FTIR和1H NMR光谱表征。 HPPI和BP通过紫外可见光谱显示出相似的吸收。通过光DSC分析研究了三羟甲基丙烷三丙烯酸酯（TMPTA）作为三官能单体的HPPI的光引发行为。结果表明，HPPIs引发的TMPTA的最大光聚合速率和不饱和转化率均低于BP。其中，具有BP部分的双叔胺部分的HPPI被发现是最有效的光引发剂。此外，由HPPI引发的用双酚A环氧丙烯酸酯EB605固化的薄膜是均匀的，并具有DMTA的高T_g。

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