Byerley T J, Eick J D, Chen G P, Chappelow C C, Millich F
Midwest Research Institute, Kansas City, MO.
Dent Mater. 1992 Nov;8(6):345-50. doi: 10.1016/0109-5641(92)90016-6.
The objective of this work was to develop polymeric materials that expand slightly upon polymerization and that could potentially be used as matrix resins for dental composites. A series of stereoisomeric alicyclic spiroorthocarbonates (SOC's) that expand when polymerized were synthesized. Three of these SOC racemates were analyzed: cis/cis-, cis/trans- and trans/trans-2,3,8,9-di(tetramethylene)-1,5,7,11-tetraoxaspiro[5.5] undecane. The degrees of expansion, approximately 3.9% and 3.5%, for the cis/cis and trans/trans, were determined by measuring the specific volume of the monomers and polymers in dilute solutions. This method of determining densities and subsequent calculated expansion or shrinkage was validated by duplicating the reported shrinkage of 4-tert-butylphenyl glycidyl ether, styrene, and methyl methacrylate. Based on these data and spectral data obtained using other analytical techniques, these stereoisomeric alicyclic SOC's appear to have potential as nonshrinking polymer or copolymer matrices for dental composites.
这项工作的目的是开发聚合时略有膨胀且有可能用作牙科复合材料基体树脂的聚合材料。合成了一系列聚合时会膨胀的立体异构脂环族螺环原碳酸酯（SOC）。分析了其中三种SOC外消旋体：顺式/顺式、顺式/反式和反式/反式-2,3,8,9-二（四亚甲基）-1,5,7,11-四氧杂螺[5.5]十一烷。通过测量稀溶液中单体和聚合物的比容，确定了顺式/顺式和反式/反式的膨胀度，分别约为3.9%和3.5%。通过重复报道的4-叔丁基苯基缩水甘油醚、苯乙烯和甲基丙烯酸甲酯的收缩率，验证了这种测定密度以及后续计算膨胀或收缩的方法。基于这些数据以及使用其他分析技术获得的光谱数据，这些立体异构脂环族SOC似乎有潜力作为牙科复合材料的无收缩聚合物或共聚物基体。
