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

1)催化剂和共聚物的适当选择提高了二氧化碳气固相反应由甲基丙烯酸甘油酯转化为共聚物的选择性，使悬垂的氧环部分转化为苯基三丁基氯化铵，由于其在共聚物膜上的部分合适，催化活性适中，表现出良好的选择性催化行为。甲基丙烯酸正丁酯被证明是一种有效的共聚单体，通过防止交联反应，可以获得更高的掺入效率和更好的选择性，从而获得具有环状碳酸盐结构的可溶性聚合物。2)将1,5,7,11-四氧螺[5.5]十一烷（SOC1）与氧化三亚甲基（OX）分别通过一次和两次的阳离子开环共聚制备了伪嵌段共聚物和三嵌段共聚物。以三氟化硼醚（BF3OEt2）为引发剂，在25*的CH2Cl2中阳离子共聚SOC1和OX时，OX的消耗速度快于SOC1。SOC1由共聚初期产生的富氧梯度共聚物聚合得到相应的伪嵌段共聚物poly[(OX-grad-SOC1)-b-SOC1]。我们还在SOC1完全消耗之前，通过在其聚合过程中加入OX，成功合成了一种伪三嵌段共聚物，得到了相应的伪三嵌段共聚物poly[SOC1-b-(OX- grade -SOC1)-b-SOC1]。

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].