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首页> 外文期刊>Journal of Applied Polymer Science >Flexible aliphatic poly(isocyanurate-oxazolidone) resins based on poly(ethylene glycol) diglycidyl ether and 4,4-methylene dicyclohexyl diisocyanate
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Flexible aliphatic poly(isocyanurate-oxazolidone) resins based on poly(ethylene glycol) diglycidyl ether and 4,4-methylene dicyclohexyl diisocyanate

机译：基于聚乙二醇二缩水甘油醚和4，4-亚甲基二环己基二异氰酸酯的柔性脂族聚（异氰脲酸酯-恶唑烷酮）树脂

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摘要

New flexible aliphatic oxazolidone-isocyanurate networks (AISOX) are obtained by reacting a low molecular weight diisocyanate (4,4-methylene dicyclohexyl diisocyanate, H12MDI) and a macro-diepoxyde (poly(ethylene glycol) diglycidyl ether, M-n=526, PEGDGE) in different molar ratio. The curing reaction, carried out from 25 degrees C to 200 degrees C, is studied by using DSC and FTIR. The effect of the molar ratio of the two monomers on thermal and mechanical properties of AISOX resins is investigated by DSC, thermogravimetric analysis, stress-strain measurements and optical microscopy. Independently from the feed composition, it is observed that the reaction steps are: (i) partial hydrolysis of isocyanate caused by water traces, (ii) incomplete trimerization of isocyanate to give isocyanurate, and (iii) formation of oxazolidone and complete conversion of isocyanate. At the highest concentration of the soft macrodiepoxyde (PEGDGE), the AISOX resin is in the rubbery state at room temperature and shows an elastomeric behavior. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43404.
机译：通过使低分子量二异氰酸酯（4,4-亚甲基二环己基二异氰酸酯，H12MDI）与大二环氧（聚乙二醇二缩水甘油醚，Mn = 526，PEGDGE）反应获得新的柔性脂肪族恶唑烷酮-异氰脲酸酯网络（AISOX）在不同的摩尔比。使用DSC和FTIR研究了在25摄氏度至200摄氏度之间进行的固化反应。通过DSC，热重分析，应力应变测量和光学显微镜研究了两种单体的摩尔比对AISOX树脂的热和机械性能的影响。独立于进料组合物，观察到反应步骤是：（i）由痕量水引起的异氰酸酯的部分水解;（ii）异氰酸酯的不完全三聚以得到异氰脲酸酯;和（iii）恶唑烷酮的形成和异氰酸酯的完全转化。 。在最高浓度的软双环氧化合物（PEGDGE）下，AISOX树脂在室温下呈橡胶态，并表现出弹性行为。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43404。

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