【摘 要】
：
采用实时红外光谱仪(RT-FTIR)研究了单体结构、单体配比以及活性稀释剂结构对樟脑醌(CQ)/胡椒环(BDO)引发的光聚合动力学的影响,结果发现,UDMA虽然黏度较低,但是易发生链转移
【机 构】
：
西北大学合成与天然功能分子化学教育部重点实验室化学与材料科学学院,鹤壁职业技术学院化工与材料工程学院,北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室,
论文部分内容阅读
采用实时红外光谱仪(RT-FTIR)研究了单体结构、单体配比以及活性稀释剂结构对樟脑醌(CQ)/胡椒环(BDO)引发的光聚合动力学的影响,结果发现,UDMA虽然黏度较低,但是易发生链转移反应且在聚合体系中含量较高(70 wt%),可作为氢给体猝灭激发态CQ,从而影响CQ和BDO之间的相互作用.Bis-GMA虽然黏度大,但是反应活性高,当其与少量具有给氢能力的活性稀释剂TEGDMA配合使用时,不仅对聚合体系的反应活性影响较小,而且可显著降低体系的黏度,大大提高自由基的活动能力,有利于改善CQ/BDO的引发活性.
The effects of monomer structure, monomer ratio and reactive diluent structure on the photopolymerization kinetics induced by camphorquinone (CQ) / pepper ring (BDO) were investigated by real-time infrared spectroscopy (RT-FTIR) Viscosity is low, but chain transfer reaction is easy to occur and the content is high in the polymerization system (70 wt%), which can quench the excited state CQ as a hydrogen donor and thus affect the interaction between CQ and BDO. High viscosity, but high reactivity, when used in combination with a small amount of TEGDMA, a reactive diluent with hydrogen donation, not only has little effect on the reactivity of the polymerization system, but also significantly reduces the viscosity of the system and greatly increases the activity of free radicals Ability to improve the priming activity of CQ / BDO.
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