Chemistry of Silanes: Interfaces in Dental Polymers and Composites.
Chemistry of Silanes: Interfaces in Dental Polymers and Composites.
复制标题
DOI：
10.6028/jres.110.081
复制
发表时间：
2005-09
影响因子：
1.5
通讯作者：
McDonough WG
中科院分区：
文献类型：
--
作者：
Antonucci JM;Dickens SH;Fowler BO;Xu HH;McDonough WG
玻璃或陶瓷填充聚合物复合材料的性能和使用寿命取决于其树脂、填料和界面相的性质以及聚合过程的效率。存在于有机聚合物基质和通常无机增强填料相之间的协同作用主要由界面/相间相介导。该后一相是由于硅烷偶联剂（YRSiX 3）的双重反应性而形成的，所述硅烷偶联剂（YRSiX 3）是一种双官能分子，其能够经由其硅烷官能团（-SiX 3）与玻璃或陶瓷填料的硅烷醇基团反应以在填料表面上形成Si-O-Si-键，并且还能够经由其Y官能团（通常为甲基丙烯酸乙烯基）通过接枝共聚与树脂相反应。在本文中，我们探讨了一些有机硅烷的化学，特别是功能性有机硅烷（或硅烷偶联剂，因为他们是众所周知的），用于调解矿物增强聚合物复合材料的界面结合。有机硅烷的化学性质可能相当复杂，涉及在溶剂（包括单体）中的水解引发的自缩合反应，其可最终形成聚合的倍半硅氧烷结构，与羟基化或羧基化单体的交换反应以形成甲硅烷基醚和酯，以及通过与含硅矿物表面的粘合剂偶联形成硅烷衍生的界面。
The performance and service life of glass-or ceramic-filled polymeric composites depend on the nature of their resin, filler and interfacial phases as well as the efficacy of the polymerization process. The synergy that exists between the organic polymer matrix and the usually inorganic reinforcing filler phase is principally mediated by the interfacial/interphasial phase. This latter phase develops as a result of the dual reactivity of a silane coupling agent, (YRSiX3), a bifunctional molecule capable of reacting with the silanol groups of glass or ceramic fillers via its silane functional group (–SiX3) to form Si-O-Si- bonds to filler surfaces, and also with the resin phase by graft copolymerization via its Y functional group, usually a methacrylic vinyl group. In this paper, we explore some of the chemistry of organosilanes, especially that of functional organosilanes (or silane coupling agents as they are commonly known) that are used to mediate interfacial bonding in mineral reinforced polymeric composites. The chemistry of organosilanes can be quite complex involving hydrolytically initiated self-condensation reactions in solvents (including monomers) that can culminate in polymeric silsesquioxane structures, exchange reactions with hydroxylated or carboxylated monomers to form silyl ethers and esters, as well as the formation of silane derived interfaces by adhesive coupling with siliceous mineral surfaces.