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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester
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Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester

机译：基于超支化聚酯的聚（氨基甲酸酯-酯-硅氧烷）网络的动态力学，热学和表面性能分析

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摘要

Six polyurethane networks were synthesized from Boltorn? hyperbranched polyester of the second pseudo generation, α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4′-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties.
机译：从Boltorn？合成了六个聚氨酯网络。第二假代的超支化聚酯，α，ω-二羟基-（环氧乙烷-聚（二甲基硅氧烷）-环氧乙烷）（EO-PDMS-EO）和4,4'-亚甲基二苯基二异氰酸酯。通过动态机械热分析（DMTA），差示扫描量热法（DSC），热重分析（TGA），扫描电子显微镜（SEM），溶胀度测量，研究了EO-PDMS-EO含量对制备的聚氨酯性能的影响，水接触角和吸水率。不同的技术（FTIR峰解卷积，DMTA和SEM）表明，降低EO-PDMS-EO含量可促进合成聚氨酯中的微相分离。合成的具有较高EO-PDMS-EO含量的样品具有更多的疏水表面和更好的防水性能，但交联密度较低。 TGA结果表明，合成聚氨酯网络在氮中的热稳定性受交联密度和EO-PDMS-EO含量的相互影响显着影响。在这项工作中获得的结果表明，基于超支化聚酯和EO-PDMS-EO的聚氨酯的合成导致创建具有良好的热，热机械和表面性能的网络。

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