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首页> 外文期刊>RSC Advances >Enhancement of water and organic solvent resistances of a waterborne polyurethane film by incorporating liquid polysulfide
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Enhancement of water and organic solvent resistances of a waterborne polyurethane film by incorporating liquid polysulfide

机译：通过掺入液体多硫化物来增强水性聚氨酯膜的水和有机溶剂电阻

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摘要

Environmentally friendly, waterborne polysulfide-based polyurethane (WSPU) films have been successfully synthesized from liquid polysulfide (PSF), polytetramethylene ether glycol (PTMG), isophorone diisocyanate (IPDI) and dimethylolpropionic acid (DMPA). The chemical structures, mechanical and thermal properties of the chemically modified films have been carefully investigated using ATR-IR, gel permeation chromatography (GPC), tensile tests, dynamic mechanical analysis (DMA) and a thermogravimetric analyzer (TGA). As the PSF content increases from 0 to 20%, after an immersion in deionized water for 96 h, the water absorption decreases from 6.2% to 3.4% and the tensile strength retention increases from 74.3% to 91.7%. The chemical resistance to organic solvents is also improved significantly. The enhanced water and organic solvent resistances of waterborne polyurethanes (WPUs) are primarily attributed to the addition of a PSF containing sulfur group. However, the tensile strength and thermal performance are weakened to some extent. This study produces a new composite derived from polysulfide, and its high water and solvent resistance performance could contribute to surface material research.
机译：环保的水性多硫化物基聚氨酯（WSPU）薄膜已从液体多硫化物（PSF），聚四体醚二醇（PTMG），异佛酮二异氰酸酯（IPDI）和二羟基丙烯酸（DMPA）中成功地合成。使用ATR-IR，凝胶渗透色谱（GPC），拉伸试验，动态机械分析（DMA）和热重分析仪（TGA）仔细研究了化学改性薄膜的化学结构，机械和热性能。随着PSF含量从0％增加到20％，在浸入去离子水中96小时后，吸水率从6.2％降低至3.4％，拉伸强度保持从74.3％增加到91.7％。对有机溶剂的耐化学性也显着提高。水性聚氨酯（WPU）的增强的水和有机溶剂电阻主要归因于添加含有硫基团的PSF。然而，拉伸强度和热性能在一定程度上削弱。该研究产生了衍生自多硫化物的新型复合材料，其高水和耐溶剂性能可能有助于表面材料研究。

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