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首页> 外文期刊>Journal of Applied Polymer Science >Miscibility and properties of blend membrane of waterborne polyurethane and carboxymethylchitin
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Miscibility and properties of blend membrane of waterborne polyurethane and carboxymethylchitin

机译：水性聚氨酯与羧甲基壳多糖共混膜的混溶性和性能

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摘要

We prepared a series of blend membranes by blending waterborne polyurethane (WPU) and carboxymethylchitin (CMCH) in aqueous systems. The effects of CMCH content on the miscibility, morphology, thermal stability, and mechanical properties of the blend membranes were investigated by dilute solution viscometry (DSV), Fourier transform infrared spectroscopy, wide-angle X-ray diffraction (WXRD), scanning electron microscopy, dynamic mechanical analysis (DMA), thermogravimetric analysis, ultraviolet (UV) spectroscopy, and tensile testing. The miscibility parameter of the WPU/CMCH aqueous solution obtained by DSV predicted that the blends of WPU and CMCH were miscible or partially miscible. Moreover, the partial miscibility of the blend membranes over the entire composition range were confirmed by FTIR, WXRD, DMA, and UV spectroscopy to support the conclusion from DSV. New hydrogen bonds were formed between CMCH and WPU in the blend membranes, resulting in strong intermolecular interactions. By inducing the CMCH, we improved the tensile strength, thermostability, and organic solvent resistance of the blend membranes significantly. Therefore, this study not only provided a novel way to prepare an environmentally-friendly material but also expanded the application of chitin and CMCH. (C) 2003 Wiley Periodicals, Inc. [References: 39]
机译：我们通过在水性体系中共混水性聚氨酯（WPU）和羧甲基甲壳素（CMCH）制备了一系列共混膜。通过稀溶液粘度法（DSV），傅立叶变换红外光谱，广角X射线衍射（WXRD），扫描电子显微镜研究了CMCH含量对共混膜混溶性，形态，热稳定性和机械性能的影响。 ，动态机械分析（DMA），热重分析，紫外线（UV）光谱和拉伸测试。通过DSV获得的WPU / CMCH水溶液的混溶性参数预测WPU和CMCH的混合物是可混溶的或部分可混溶的。此外，通过FTIR，WXRD，DMA和UV光谱证实了共混膜在整个组成范围内的部分混溶性，以支持DSV的结论。在共混膜中，CMCH和WPU之间形成了新的氢键，导致强烈的分子间相互作用。通过诱导CMCH，我们显着提高了共混膜的拉伸强度，热稳定性和耐有机溶剂性。因此，本研究不仅为制备环保材料提供了一种新颖的方法，而且扩大了甲壳质和CMCH的应用。 （C）2003 Wiley Periodicals，Inc. [参考：39]

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