A Study on Development of Expansible Composite Resins Containing Microspherical Filler with Improved Surface

在本研究中，有三种可扩展单体，1-乙烯基-4-乙基1 -2，6，7-三氧环[2，2，2]八烯，含有二氧烷和三甲基六氧烷二氧烷的双氧烷酯结构是合成的，以及各种可扩展的复合树脂，有各种可扩展单体/稀释单体[三乙基乙二醇二甲基丙烯酸酯或di]（methacryloxy ethyl）三甲基六甲基二烯]具有改进表面的比率和试验微填充物（75重量%）were prepared。各种可扩展复合物的物理和机械属性已经被测试过，并且随后的结果已经被发现。在混合时间的测试中，可扩展的复合沉积物倾向于在很长一段时间内增加可扩展单体的附加体积。2.在curing time的测试中， expansible composite resins tended to behind time in proportion增加expansible monomer的附加体积。3.在对压缩和张力强度的测试中，可扩展的复合树脂倾向于减少，以增加可扩展单体的附加体积。4. Cationic催化剂， （C_2H_5）_2O·BF_3曾使用过这项研究，聚合酶的使用寿命很短，而且比苯唑醇过氧化物更晚。在未来，这是必要的，可扩展单体、催化剂和加速器的附加体积是可以调查的，在订购时，可扩展复合物可以有效地恢复。

In this study, three kinds of expansible monomers,1-vinyl-4-ethy1-2,6,7-trioxabicyclo [2,2,2] octane, isophorone diisocyanate and trimethyl hexamethylene diisocyanate containing bicyclic ortho ester structure were synthesized, and various expansible composite resins, which had various expansible monomer/dilute monomer [triethylene glycol dimethacrylate or di (methacryloxy ethyl) trimethyl hexamethylene diurethane] ratio and trial microspherical filler with improved surface (75wt% const.) were prepared. The physical and mechanical properties of various expansible composite resins were examined, and the following results were obtained.1. In the examination of mixing time, expansible composite resins tended to take a long time in proportion to increase additive volume of expansible monomer. 2. In the examination of curing time, expansible composite resins tended to behind time in proportion to increase additive volume of expansible monomer. 3. In the examinations of compressive and tensile strength, expansible composite resins tended to decrease in proportion to increase additive volume of expansible monomer. 4. Cationic catalyst, (C_2H_5)_2O・BF_3 which used this study, had a short life time and more late in rate of polymerization than radical catalyst benzoyl peroxide.In the future, it is necessary that kinds and additive volume of expansible monomers, catalysts and accelerator are investigated,in order that expansible composite resins become practicable.