Patel M P, Braden M
Dental School, London Hospital Medical College, UK.
Biomaterials. 1989 May;10(4):277-80. doi: 10.1016/0142-9612(89)90106-3.
Heterocyclic methacrylates have been shown to have low polymerization shrinkage. In this paper, the extent of ring opening has been assessed by the degree of consequent cross-linking. In polymers of tetrahydrofurfuryl methacrylate and acrylate, tetrahydropyranyl and tetrahydropyran-2-ylmethyl methacrylate, fewer than 1% monomer units were involved in cross-linking and hence ring-opening reactions. 2-epoxypropyl methacrylate, when polymerized, was very extensively cross-linked indicating prolific ring opening. However, the polymerization shrinkage of this material was the highest of the heterocyclic methacrylates studied and was that predicted from the known molar volume change of methacrylate esters. Ring opening does not, therefore, appear to be a significant factor in the polymerization shrinkage of heterocyclic methacrylates.
已表明杂环甲基丙烯酸酯具有较低的聚合收缩率。在本文中，通过后续交联程度评估了开环程度。在甲基丙烯酸四氢糠酯和丙烯酸酯、甲基丙烯酸四氢吡喃酯和甲基丙烯酸四氢吡喃-2-基甲酯的聚合物中，参与交联并因此发生开环反应的单体单元少于1%。甲基丙烯酸2-环氧丙酯在聚合时发生了非常广泛的交联，表明开环反应很多。然而，该材料的聚合收缩率是所研究的杂环甲基丙烯酸酯中最高的，并且是根据甲基丙烯酸酯已知的摩尔体积变化预测得出的。因此，开环似乎不是杂环甲基丙烯酸酯聚合收缩率的一个重要因素。
