New Phosphonate-Based Additives for Fortification in Model Epoxies

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• 作者：Christoph F. Kins ; Gunther Brunklaus ; Hans Wolfgang Spiess
• 刊名：Macromolecules
• 出版年：2013
• 出版时间：March 26, 2013
• 年：2013
• 卷：46
• 期：6
• 页码：2067-2077
• 全文大小：467K
• 年卷期：v.46,no.6(March 26, 2013)
• ISSN：1520-5835

文摘

The bulk properties of polymers are often adjusted via addition of a complex blend of compounds collectively known as additives, where so-called molecular fortifiers (or antiplasticizers) may improve the mechanical properties. On the basis of our previous work, we have further explored the potential of reactive phosphonate based additives for enhancement of mechanical and thermal properties of an amine-cured model epoxy resin. In particular, successful fortification based on 鈥渋onic bond鈥?formation was achieved for a series of novel custom-made compounds with systematic variation of side groups. Both cure temperature and chemical structure of the fortifier have significant impact on the epoxy鈥檚 properties as well as aging behavior. Long-term storage of the epoxies resulted in partial loss of initially achieved fortification. Bifunctional fortifiers revealed particularly robust and much superior performance compared to the previously recommended fortifier dimethyl methylphosphonate (DMMP), rendering them most promising for potential application.