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首页> 外文期刊>Journal of Applied Polymer Science >Effects on the structure and properties of membranes formed by blending polydimethylsiloxane polyurethane into different soft-segment waterborne polyurethanes
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Effects on the structure and properties of membranes formed by blending polydimethylsiloxane polyurethane into different soft-segment waterborne polyurethanes

机译：对聚二甲基硅氧烷聚氨酯混入不同软段水性聚氨酯中形成的膜的结构和性能的影响

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摘要

Polydimethylsiloxane polyurethane (PDMS-PU), which was synthesized from PDMS as the soft segment, was blended into a variety of ester- or ether-based soft-segment waterborne polyurethanes with different concentrations to investigate the crystallization, thermal, and physical properties of the membrane formations. According to X-ray analysis, the ether-based PUs, synthesized from soft segments of poly(propylene glycol) (PPG1000) or poly(ethylene glycol) (PEG2000), were found to have maximum crystallinity at a 5% blending ratio of PDMS-PU, but the ester-based PU, synthesized from soft segments of polycaprolactone (PCL1250), had decreased crystallinity at a 5% blending ratio. Differential scanning calorimetric analysis revealed that the T values of PUs were highest when the blending ratio of PDMS-pu was 5%-10%, except for PU from PCL1250. Moreover, ether-based PUs showed maximum T-m,T-h values, but the T-m,T-h of the ester-based PU was greatly reduced when PU with PCL1250 was blended with PDMS-PU. In addition, the PU from PEG2000 had the highest melting entropy. Mechanical property analysis showed that the stress of ether-based PUs would be increased when PUs were blended with a small amount of PDMS-PU and that the stress of PU from poly(tetramethylene glycol) (PTMG1000) increased to its greatest value (20-30 MPa). On the other hand, the ester-based PU, from PCL1250 blended with PDMS-PU, would have reduced stress. On the whole, the stress and strain of PU from PEG1000 had excellent balance. (c) 2006 Wiley Periodicals, Inc.
机译：由PDMS作为软链段合成的聚二甲基硅氧烷聚氨酯（PDMS-PU）被掺入各种不同浓度的酯基或醚基软段水性聚氨酯中，以研究其结晶，热学和物理性能。膜的形成。根据X射线分析，发现由聚丙二醇（PPG1000）或聚乙二醇（PEG2000）的软链段合成的醚基PU在PDMS的5％混合比例下具有最大结晶度-PU，但由聚己内酯（PCL1250）的软链段合成的酯基PU在5％的混合比下结晶度降低。差示扫描量热分析表明，当PDMS-pu的掺混率为5％-10％时，除了PCL1250的PU外，PU的T值最高。而且，基于醚的PU显示出最大的T-m，T-h值，但是当将带有PCL1250的PU与PDMS-PU混合时，基于酯的PU的T-m，T-h大大降低。另外，来自PEG2000的PU具有最高的熔融熵。力学性能分析表明，当聚氨酯与少量PDMS-PU混合时，醚基PU的应力会增加，而聚四亚甲基二醇（PTMG1000）的PU应力会增加到最大值（20- 30 MPa）。另一方面，将PCL1250中的酯基PU与PDMS-PU混合，可以降低应力。总体而言，PEG1000的PU的应力和应变具有极好的平衡。 （c）2006年Wiley Periodicals，Inc.

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