Development of methacrylate/silorane hybrid monomer system: Relationship between photopolymerization behavior and dynamic mechanical properties.
Development of methacrylate/silorane hybrid monomer system: Relationship between photopolymerization behavior and dynamic mechanical properties.
复制标题
甲基丙烯酸酯/硅氧烷杂化单体体系的开发：光聚合行为与动态机械性能之间的关系。
DOI：
10.1002/jbm.b.33435
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Spencer,Paulette
中科院分区：
文献类型：
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作者：
Song,Linyong;Ye,Qiang;Ge,Xueping;Singh,Viraj;Misra,Anil;Laurence,JenniferS;Berrie,CindyL;Spencer,Paulette
牙科复合材料的树脂化学物质正在不断发展，2007 年推出了基于硅氧烷的复合材料。这种基于甲基丙烯酸酯的复合材料的格局转变推动了对多功能甲基丙烯酸酯-硅氧烷粘合剂的需求。本研究的目的是评估甲基丙烯酸酯-硅氧烷杂化体系的聚合行为和结构/性能关系。选择胺化合物4-(二甲氨基)苯甲酸乙酯(EDMAB)或硅烷化合物三(三甲基硅基)硅烷(TTMSS)作为共引发剂。当使用 EDMAB 作为共引发剂时，共聚物的机械性能在低浓度（15、25 或 35 wt%）的硅烷下显着改善。与对照（30.8±1.9 MPa）相比，这些实验共聚物的橡胶模量增加了 260%。如果配方中的硅烷浓度为 50-75 wt%，则这些配方中会出现可见的相分离。使用 TTMSS 作为共引发剂减少了相分离，但机械性能随之下降。在纯甲基丙烯酸酯配方中，EDMAB 或 TTMSS 自由基聚合的最大速率分别为 0.28 或 0.06 s−1。在纯硅烷树脂中，EDMAB 或 TTMSS 的阳离子开环聚合的最大速率分别为 0.056 或 0.087 s−1。相分离现象可能归因于甲基丙烯酸酯的自由基聚合和硅氧烷的阳离子开环聚合的速率差异。在混合体系中，由 EDMAB 引发的自由基聚合导致在干/湿条件下具有更高的交联密度和更好的机械性能。然而，这些有益的影响与网络结构异质性的增加有关。 © 2015 Wiley periodicals, Inc. J Biomed Mater Res B 部分：Appl Biomater，104B：841–852，2016。
Resin chemistries for dental composite are evolving as noted by the introduction of silorane‐based composites in 2007. This shift in the landscape from methacrylate‐based composites has fueled the quest for versatile methacrylate‐silorane adhesives. The objective of this study was to evaluate the polymerization behavior and structure/property relationships of methacrylate‐silorane hybrid systems. Amine compound ethyl‐4‐(dimethylamino) benzoate (EDMAB) or silane compound tris(trimethylsilyl) silane (TTMSS) was selected as coinitiators. The mechanical properties of the copolymer were improved significantly at low concentrations (15, 25, or 35 wt %) of silorane when EDMAB was used as coinitiator. The rubbery moduli of these experimental copolymers were increased by up to 260%, compared with that of the control (30.8 ± 1.9 MPa). Visible phase separation appeared in these formulations if the silorane concentrations in the formulations were 50–75 wt %. The use of TTMSS as coinitiator decreased the phase separation, but there was a concomitant decrease in mechanical properties. In the neat methacrylate formulations, the maximum rates of free‐radical polymerization with EDMAB or TTMSS were 0.28 or 0.06 s−1, respectively. In the neat silorane resin, the maximum rates of cationic ring‐opening polymerization with EDMAB or TTMSS were 0.056 or 0.087 s−1, respectively. The phase separation phenomenon may be attributed to differences in the rates of free‐radical polymerization of methacrylates and cationic ring‐opening polymerization of silorane. In the hybrid systems, free‐radical polymerization initiated with EDMAB led to higher crosslink density and better mechanical properties under dry/wet conditions. These beneficial effects were, however, associated with an increase in heterogeneity in the network structure. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 841–852, 2016.