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| 1 | Properties of a New Dental Photocurable Matrix Resin with Low Shrinkage显示文摘In order to reduce the amount of volumetric shrinkage that occurs in dental composites as a result of curing,a new kind of dental matrix resin combining bisphenol-S-bis(3-meth acry late-2-hydroxy propyl)ether(BisS-GMA) with the expanding monomer unsaturated spiro orthoesters 2-methylene-1,4,6-trispiro[4,4] nonane (SOE) was prepared,with triethylene glycol dimethacrylate (TEGDMA) as diluent.CQ (camphorquinone) of 1wt% and DMAEMA (2-(dimethylamino) ethyl meth acrylate) of 2wt% were used as photoinitiation system to initiate the copolymerization of the matrix resins.The performance including volumetric shrinkage,degree of conversion and condition of the ring-opening reaction of SOE,as well as curing time and the tensile bond strength were investigated respectively by the dilatometer,Fourier transfer infrared,the universal testing machine,and so on.The ring-opening polymerization of SOE occurred.Meanwhile,the obtain copolymers were crosslinked.The matrix resin containing BisS-GMA and SOE showed a reduced amount of volumetric shrinkage at 1.52%,which is a promising strategy for obtaining a polymer with a low amount of volumetric shrinkage.Furthermore,the other properties were not compromised. | 付静 | 2011 | Journal of Wuhan University of Technology(Materials Science)2011，26，2： | 1 |
| 2 | C2轴对称多螺环化合物的合成及^1HNMR特征显示文摘由于手性螺环化合物广泛应用于有机合成领域,其特殊结构和性质越来越引起关注。通过实验和文献总结,结合含有手性轴的螺环化合物的1HNMR谱,发现在手性轴内的所有亚甲基(CH_2)上的2个H均发生裂分。结果表明发生裂分的原因不是由于螺环的刚性,而是手性轴的影响。 | 杨日升 董叶丰 杨伟军 | 2016 | 中国石油和化工2016，0，6： | 0 |
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