• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Effects of polyaminosiloxane on the structure and properties of modified waterborne polyurethane
【24h】

Effects of polyaminosiloxane on the structure and properties of modified waterborne polyurethane

机译：聚酰胺硅氧烷对改性水性聚氨酯结构与性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A waterborne polyurethane (WPU) prepolymer was synthesized with poly(tetramethylene glycol) to form the soft segment, dimethylolpropionic acid as a hydrophilic chain extender, and isophorone diisocyanate. Moreover, the graft and block copolymer emulsification of WPU-polysiloxane and their films was carried out through reactions between the WPU prepolymer, aminoethyl aminopropyl dimethicone (AEAPS), and a linear polyether-blocked amino silicone (LEPS), respectively. The properties of the structure and formed films of the WPU were characterized with Fourier transform infrared spectrometry, gel permeation chromatography, X-ray diffraction, thermogravimetric analysis, dynamic thermomechanical analysis, and X-ray photoelectron spectroscopy; the measurement of the water contact angle; the testing of the water absorption; and so on. The WPU-polysiloxane emulsion showed a high stability, and the molecular weight of WPU increased. Moreover, the glass-transition temperature (T-g) of the soft segment of polysiloxane that was incorporated into the WPU shifted to a lower temperature range, whereas the T-g of the hard segment shifted to a higher temperature range, and the crystallinity of the WPU-polysiloxane film was reduced. There was a greater degree of crosslinking and accumulation of polysiloxane segments on the surface of the WPU emulsion that was modified with AEAPS in comparison to the LEPS-modified WPU emulsion. Therefore, the water resistance of the AEAPS-modified WPU was higher than that of the LEPS-modified WPU. The rigidity and elasticity of the WPU-polysiloxane film improved, whereas its tensile strength did not change much after AEAPS was used. However, this was not true after LEPS was used, as the tensile strength decreased significantly. Nevertheless, the flexibility and plasticity of the WPU-polysiloxane film were enhanced after LEPS was used. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47226.
机译：用聚（四亚甲基二醇）合成水性聚氨酯（WPU）预聚物以形成软链段，二羟甲基丙酸作为亲水链增量剂和异佛酮二异氰酸酯。此外，通过WPU预聚物，氨基乙基氨基丙基二甲基硅氧烷（AEAP）与线性聚醚嵌入的氨基硅氧烷（LEP）之间的反应进行WPU-聚硅氧烷及其薄膜的移植物和嵌段共聚物乳化。 WPU的结构和形成的薄膜的性质具有傅里叶变换红外光谱，凝胶渗透色谱，X射线衍射，热重分析，动态热机械分析和X射线光电子能谱;测量水接触角;对吸水性的测试;等等。 WPU-聚硅氧烷乳液显示出高稳定性，WPU的分子量增加。此外，掺入WPU中的聚硅氧烷的软链段的玻璃化转变温度（Tg）移至较低的温度范围内，而硬区段的Tg转移到较高的温度范围，以及WPU的结晶度聚硅氧烷膜降低。与LEPS改性的WPU乳液相比，在WPU乳液的表面上进行了更大程度的交联和聚硅氧烷区段的积累。因此，AEAPS改性WPU的耐水性高于LEPS改性WPU的耐水性。 WPU-聚硅氧烷膜的刚性和弹性得到改善，而在使用AEAP后，其拉伸强度不会发生太多。然而，在使用LEPs之后，这不是真的，因为拉伸强度显着下降。然而，在使用LEP后，增强了WPU-聚硅氧烷薄膜的柔韧性和可塑性。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47226。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号