Preparation and Properties of Highly Dispersed Nano-Silica Modified Polyurethane via Click Chemistry Reaction

被引：0
|
作者：
Zhang Q. [1 ]
Ju Y. [2 ]
Xu S. [1 ]
Li X. [1 ]
Zhang Y. [2 ]
机构：
[1] School of Materials Science and Engineering, Linyi University, Linyi
[2] College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2020年 / 36卷 / 05期
关键词：
1; 3-dipolar cycloaddition; Copper-catalyzed; Nano-silica; Polyurethane;
D O I：
10.16865/j.cnki.1000-7555.2020.0105
中图分类号：
学科分类号：
摘要：
The polyurethane (PU) bearing alkyne groups was firstly prepared by using 2, 2-di (prop-2-ynyl) propane-1, 3-dio (DPPD) as chain extender. Nano-silica modified PU composites were prepared via the copper-catalyzed 1, 3-dipolar cycloaddition (CuAAC) click chemistry reaction between nano-silica with high grafting density of 3-azidopropyltriethoxysilane and alkyne-functionalized PU. The cross-sectional morphology, thermal stability and solvent resistance of PU nanocomposites were characterized. The results show that the nanoparticles are well dispersed in the nano-silica modified PU based on CuAAC click reaction, and the thermal stability and solvent resistance are significantly enhanced. With the increase of nano-silica content, the solvent resistance and thermal stability of the PU composite films were gradually enhanced. When the content of nano-silica is 3% in the PU nanocomposites, the temperature at the maximum decomposition rate is increased by 12℃, and the adsorption rate of toluene is reduced by 586% compared with pure PU. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：71 / 78and85
页数：7814
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