通过差示扫描量热法（DSC）以及碳-13（¹³C）溶液和固态核磁共振光谱法对一种二甲基丙烯酸酯共聚物（双酚A-双甲基丙烯酸缩水甘油酯和三乙二醇二甲基丙烯酸酯）网络进行分析。
Analysis of a dimethacrylate copolymer (bis-GMA and TEGDMA) network by DSC and 13C solution and solid-state NMR spectroscopy.
作者信息
Morgan D R, Kalachandra S, Shobha H K, Gunduz N, Stejskal E O
机构信息
Department of Chemistry, NSF Science and Technology Center, Virginia Polytechnic Institute and State University, Blackshurg 24061, USA.
出版信息
Biomaterials. 2000 Sep;21(18):1897-903. doi: 10.1016/s0142-9612(00)00067-3.
In this work the effect of dilution with TEGDMA on the kinetics of Bis-GMA polymerization and on the extent of polymerization or degree of conversion was studied using (a) DSC and (b) NMR. The systems with lower viscosity and lower Tg exhibited higher extent of polymerization. For Bis-GMA/TEGDMA mixtures the calculated Tg values were found to be higher than the experimental values suggesting that a dilution effect is predominant rather than intermolecular hydrogen bonding. Solid state NMR has been shown to be a convenient method for measuring the total amount of conversion in a mixed monomer system. The disappearance of the NMR solution spectrum was used to reveal overall polymerization kinetics.
在本研究中，使用（a）差示扫描量热法（DSC）和（b）核磁共振（NMR）研究了用三乙二醇二甲基丙烯酸酯（TEGDMA）稀释对双酚A缩水甘油醚甲基丙烯酸酯（Bis - GMA）聚合动力学以及聚合程度或转化率的影响。具有较低粘度和较低玻璃化转变温度（Tg）的体系表现出更高的聚合程度。对于Bis - GMA/TEGDMA混合物，发现计算得到的Tg值高于实验值，这表明稀释效应占主导，而非分子间氢键作用。固态核磁共振已被证明是一种测量混合单体体系中总转化率的便捷方法。利用核磁共振溶液谱的消失来揭示整体聚合动力学。
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