摘要
目的和方法:用新的改进的有机金属路线,以1-溴代正丁烷、三氯化硼乙醚溶液和镁为原料合成出一种牙科树脂聚合引发剂──三丁基硼(TBB).详细考察了合成反应并获得最佳反应条件.研究了它做为聚甲基丙烯酸甲酯/甲基丙烯酸甲酯(PMMA/MMA)牙科树脂体系的引发剂的性能.结果:当三氟化硼乙醚在总乙醚中的浓度为0.25mol/L,滴加完1-溴代正丁烷后回流3h时。三丁基硼的产率为75%.合成的三丁基硼能引发MMA聚合而使PMMA/MMA树脂体系固化.当引发剂质量分数为12.7%和17.9%时,固化时间分别为8.1和5.6min.结论:用新的改进的有机金属路线,能合成出三丁基硼,三丁基硼能引发MMA聚合而使PMMA/MMA树脂体系固化.固化时间与三丁基硼的用量有关.
AIM and METHODS: A dental resin polymerization initiator tri-n-butylborane (TBB) was synthesized directly by using n-BuBr, BF3·Et2O and Mg as the raw materials via a novel modified organometallic route. The best synthetic condition was investigated. The properties of TBB using as a dental resin initiator were also studied. RESULTS: When the concentration of BF3·Et2O in Et2O was 0. 25 mol/L and the reflux time was 3 hours after 1-BuBr dripped in, the yield of TBB was 75%. The polymerization of MMA could be initiated by TBB and then the PMMA/MMA mixture could be solidified. When the mass fraction of the initiator was 12.7% and 17. 9 %, the solidifying time was 8. 1 and 5. 6 minutes respectively. CONCLUSION: The TBB has been synthesized via a novel modified organometallic route. The polymerization of MMA is initiated by TBB and the solidifying time of PMMA/MMA resin is related to the content of initiator.
出处
《第四军医大学学报》
1999年第3期239-241,共3页
Journal of the Fourth Military Medical University
关键词
牙科树脂
引发剂
三丁基硼
合成
dental resin
initiator
tri-n-butylborane
synthesis