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Synthesis and Properties of Linear Polyether-Blocked Amino Silicone-Modified Cationic Waterborne Polyurethane
International Journal of Polymer Science ( IF 3.3 ) Pub Date : 2020-04-08 , DOI: 10.1155/2020/4162368
Chengshu Xu 1 , Lei OuYang 2 , Yan Ren 1 , Zaisheng Cai 3 , Shaofeng Lu 1 , Jing Zhang 1 , Wenzhao Shi 1
Affiliation  

In this study, a waterborne polyurethane (WPU) is synthesized by using polytetramethylene ether glycol (PTMEG) to form the soft segment, 1,4-butanediol (BDO) as the chain extender, n-methyldiethanolamine (MDEA) as a hydrophilic chain extender, and isophorone diisocyanate (IPDI) to form the hard segment. Furthermore, the modified cationic WPU emulsion and its films are created through a reaction between the WPU and a linear polyether-blocked amino silicone (LEPS), which is an organosilicon compound that imparts flexibility. The properties of the structure and formed WPU films are then characterized by using Fourier transform infrared spectrometry, a thermogravimetric analysis, atomic force microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, as well as by measuring the water contact angle, testing the water absorption, etc. It is found that, with an increase in the LEPS content in the WPU, the particle size of the modified WPU emulsion is increased, the WPU films are more flexible, and the resistance of the modified WPU films to heat and water are increased, while the crystallinity is reduced. The polysiloxane chain segment, which is added to the LEPS-modified WPU emulsion, is significantly enriched on the surface of the modified WPU films, while there are no adverse effects of the LEPS-modified WPU emulsion on the adhesive force between the WPU and substrate. When the LEPS content of the WPU is 14.0 wt%, the modified WPU emulsion and film provide the best performance.

中文翻译:

线性聚醚嵌段氨基硅氧烷改性阳离子水性聚氨酯的合成及性能

在这项研究中,通过使用聚四亚甲基醚二醇(PTMEG)形成软链段,1,4-丁二醇(BDO)作为扩链剂,正甲基二乙醇胺(MDEA)作为亲水扩链剂来合成水性聚氨酯(WPU)。和异佛尔酮二异氰酸酯(IPDI)形成硬链段。此外,改性的阳离子WPU乳液及其薄膜是通过WPU与线性聚醚嵌段氨基硅氧烷(LEPS)之间的反应产生的,后者是赋予柔性的有机硅化合物。然后通过使用傅立叶变换红外光谱,热重分析,原子力显微镜,X射线衍射和X射线光电子能谱以及通过测量水接触角,测试来表征结构和形成的WPU膜的特性吸水率等 已经发现,随着WPU中LEPS含量的增加,改性的WPU乳液的粒度增加,WPU膜更柔韧性,并且改性的WPU膜对热和水的抵抗力增加,而结晶度降低。添加到LEPS改性WPU乳液中的聚硅氧烷链段在改性WPU膜的表面上显着富集,而LEPS改性WPU乳液对WPU与基材之间的粘合力没有不利影响。当WPU的LEPS含量为14.0 wt%时,改性的WPU乳液和薄膜可提供最佳性能。改性后的WPU膜对热和水的抵抗力增加,而结晶度降低。添加到LEPS改性WPU乳液中的聚硅氧烷链段在改性WPU膜的表面上显着富集,而LEPS改性WPU乳液对WPU与基材之间的粘合力没有不利影响。当WPU的LEPS含量为14.0 wt%时,改性的WPU乳液和薄膜可提供最佳性能。改性后的WPU膜对热和水的抵抗力增加,而结晶度降低。添加到LEPS改性WPU乳液中的聚硅氧烷链段在改性WPU膜的表面上明显富集,而LEPS改性WPU乳液对WPU与基材之间的粘合力没有不利影响。当WPU的LEPS含量为14.0 wt%时,改性的WPU乳液和薄膜可提供最佳性能。
更新日期:2020-04-08
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