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| 单体性质对樟脑醌/胡椒环光引发活性的影响 | |
| 引用本文： | 史素青,张琴,高娜,张守花,宫永宽,聂俊. 单体性质对樟脑醌/胡椒环光引发活性的影响[J]. 高分子学报, 2012, 0(8): 812-817 |
| 作者姓名： | 史素青 张琴 高娜 张守花 宫永宽 聂俊 |
| 作者单位： | 1. 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 西安710069 2. 鹤壁职业技术学院化工与材料工程学院 鹤壁458083 3. 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 北京 100029 |
| 基金项目： | 陕西省教育厅专项科研计划,陕西省自然科学基础研究计划,中国博士后科学基金 |
| 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. |
| 关 键 词： | 樟脑醌 胡椒环 单体 引发活性 |
EFFECT OF MONOMER CHARACTERISTICS ON PHOTOINITIATING ACTIVITY OF CAMPORQUINONE/1,3-BENZODIOXOLE SYSTEM |
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| Su-qing Shi , Qin Zhang , Na Gao , Shou-hua Zhang , Yong-kuan Gong , Jun Nie. EFFECT OF MONOMER CHARACTERISTICS ON PHOTOINITIATING ACTIVITY OF CAMPORQUINONE/1,3-BENZODIOXOLE SYSTEM[J]. Acta Polymerica Sinica, 2012, 0(8): 812-817 | |
| Authors: | Su-qing Shi Qin Zhang Na Gao Shou-hua Zhang Yong-kuan Gong Jun Nie |
| Affiliation: | 1 Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science,Northwest University,Xi’an 710069) (2 State Key Laboratory of Chemical Resource Engineering,College of Materials Science and Engineering, Beijing University of Chemical Technology,Beijing 100029)(3 College of Chemical and Materials Engineering,Hebi Vocational and Technical College,Hebi 458030) |
| Abstract: | Real-time infrared spectroscopy(RT-FTIR) was used to study the effect of chemical structure of oligomer,reactive diluent and the ratio of oligomer and reactive diluent on the initiating activity of camphorquinone(CQ)/1,3-benzodioxole(BDO).The results showed that,urethane dimethacrylate(UDMA) with a low viscosity was prone to chain transfer reaction and had hydrogen donating ability.In the polymerization system with high content of UDMA,UDMA could be used as a competitive hydrogen donor to interact with the exited CQ,which significantly influenced the interaction of exited CQ and BDO.Another commercial oligomer 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]propane(bis-GMA) with a high viscosity exhibited a high reactivity.When it combined with reactive diluent triethylene glycol dimethacrylate(TEGDMA) in the formulation,a relatively less amount of TEGDMA,i.e.30%,could greatly reduce the viscosity of the monomer system and have little influence on the reactivity of Bis-GMA.At the same time,the Bis-GMA/TEGDMA(70/30,W/W) system with a lower viscosity could greatly improve the mobility of the free radical active species,which was beneficial to improve the initiating activity of CQ/BDO. |
| Keywords: | Camphorquinone Benzodioxole Monomers Initiating activity |
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