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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and photoinitiating activity study of polymeric photoinitiators bearing BP moiety based on hyperbranched poly(ester-amine) via thiol-ene click reaction
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Synthesis and photoinitiating activity study of polymeric photoinitiators bearing BP moiety based on hyperbranched poly(ester-amine) via thiol-ene click reaction

机译：基于超支化聚（酯-胺）的巯基-烯烃点击反应合成带有BP部分的聚合物光引发剂的合成和光引发活性的研究

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摘要

A series of polymeric photoinitiators (BP-HPEAs) bearing BP moiety based on hyperbranched poly(ester-amine) were synthesized via the thiol-ene click reaction of 3-(4-benzoylphenoxy)propyl 2-mercaptoacetate (BPPM) with acrylated HPEA. BPPM was obtained by the esterification of (4-(3-hydroxypropoxy) phenyl) phenyl methanone (HPPM) with mercaptoacetic acid in the presence of p-toluene sulphonic acid as a catalyst. HPEA was prepared through Michael addition of piperazine with tri(hydroxymethyl)propane triacrylate. Their molecular structures were confirmed by the ~1H NMR, ~(13)C NMR, and FTIR analysis. The UV-vis spectrum analysis results showed that BP-HPEAs exhibit the stronger n-π* absorption at ～ 340 nm with over two times higher molar extinction coefficients than BP at the concentration of 1.00 × 10~(-3)M. The photoinitiating activity study showed that the maximum photopolymerization rates of 1,6-hexanediol diacrylate initiated by BP-HPEAs in the absence of coinitiator were obtained by two times higher than that by BP in the presence of triethylamine as a coinitiator. Moreover, the excellent miscibility of BP-HPEAs with the commercial bisphenol A epoxy diacrylate was achieved according to the T_s/T_g ratios of over 9.0 from DMTA.
机译：通过2-巯基乙酸3-（4-苯甲酰苯氧基）丙基（BPPM）与丙烯酸酯化的HPEA的硫醇-烯点击反应，合成了一系列基于超支化聚（酯-胺）的带有BP部分的聚合物光引发剂（BP-HPEA）。在对甲苯磺酸为催化剂的情况下，将（4-（3-羟基丙氧基）苯基）苯基甲酮（HPPM）与巯基乙酸酯化，得到BPPM。 HPEA是通过将哌嗪与三（羟甲基）丙烷三丙烯酸酯迈克尔加成而制备的。通过〜1H NMR，〜（13）C NMR和FTIR分析确认了它们的分子结构。紫外可见光谱分析结果表明，在浓度为1.00×10〜（-3）M的条件下，BP-HPEAs在〜340 nm处具有更强的n-π*吸收，摩尔消光系数是BP的两倍以上。光引发活性研究表明，在不存在共引发剂的情况下，由BP-HPEAs引发的1,6-己二醇二丙烯酸酯的最大光聚合速率是在存在三乙胺作为共引发剂的情况下由BP获得的最大光聚合速率的两倍。此外，根据来自DMTA的T_s / T_g比超过9.0，获得了BP-HPEA与市售双酚A环氧二丙烯酸酯的优异混溶性。

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