Study on the development of resinous-restoration-system without a polymerization contraction.

1)通过选择合适的催化剂和共聚单体，提高了CO2气固相合成甲基丙烯酸缩水甘油酯共聚物的选择性。苄基三丁基氯化铵由于其在共聚物膜中合适的结构和适中的催化活性，表现出良好的选择性催化性能。甲基丙烯酸正丁酯是一种有效的共聚单体，通过阻止交联反应，提高了引入效率和选择性，使人们能够获得具有环状碳酸酯结构的可溶性聚合物。2）通过1，5，7，11-四氧杂螺[5.5]十一烷（SOC 1）与环氧丙烷（OX）分别通过一步法和两步法进行。当使用三氟化硼醚合物（BF 3 OEt 2）作为引发剂在CH 2Cl 2中在25 ° C下使SOC 1和OX阳离子共聚时，OX比SOC 1消耗得更快。由在共聚的初始阶段产生的富含OX的梯度共聚物聚合SOC 1以得到相应的假嵌段共聚物聚[（OX-grad-SOC 1）-b-SOC 1]。我们还成功地合成了假三嵌段共聚物，通过在SOC 1聚合过程中在其完全消耗之前添加OX，这提供了相应的假三嵌段共聚物，聚[SOC 1-B-（OX-grad-SOC 1）-b-SOC 1]。

1)The appropriate choice of catalysts and comonomers improved the selectivity of the gas-solid phase reaction of carbon dioxide into copolymers from glycidyl methacrylate, which transforms the pendant oxirane moieties Benzyltributylammonium chloride exhibited good and selective catalytic behavior owing to its appropriate moiety in the copolymer film and moderate catalytic activity. N-Butyl methacrylate proved to be an effective comonomer, resulting in higher incorporation efficiency and better selectivity by preventing the cross-linking reaction, allowing one to obtain soluble polymers bearing cyclic carbonate structure.2)Pseudo block and triblock copolymers were synthesized by cationic ring-opening copolymerization of 1,5,7,11-tetraoxaspiro[5.5]undecane(SOC1) with trimethylene oxide(OX) via one-shot and two-shot procedures, respectively. When SOC1 and OX were copolymerized cationically using boron trifluoride etherate(BF3OEt2) as an initiator in CH2Cl2 at 25*, OX was consumed faster than SOC1. SOC1 was polymerized from the OX-rich gradient copolymer produced in the initial stage of the copolymerization to afford the corresponding pseudo block copolymer, poly[(OX-grad-SOC1)-b-SOC1]. We also succeeded the synthesis of a pseudo triblock copolymer by the addition of OX during the course of the polymerization of SOC1 before its complete consumption, which provided the corresponding pseudo triblock copolymer, poly[SOC1-b-(OX-grad-SOC1)-b-SOC1].