Synthesis of Waterborne Polyurethane Modified by Nano-SiO_2 Silicone and Properties of the WPU Coated RDX  

作　　者：Li Yang Zhao Tianbo Qu Xiaoling Ding Hongjing Li Fengyan 

机构地区：[1]School of Chemistry,Beijing Institute of Technology [2]Department of Applied Chemistry,Beijing Institute of Petrochemical Technology

出　　处：《China Petroleum Processing & Petrochemical Technology》2015年第2期39-45,共7页中国炼油与石油化工（英文版）

基　　金：the financial support by the National Natural Science Foundation of China(No.20973022 and No.11472048)

摘　　要：A series of nano silica/silicone modified waterborne polyurethane(WPU) have been synthesized from polytetramethylene glycol and isophorone diisocyanate, dihydroxymethyl propionic acid and triethylamine, ethylenediamine, trimethylolpropane, nano-SiO2 and the silane coupling agent KH550. The effect of the dosage of nano-SiO2 on the WPU-Si membrane and the coated RDX(cyclotrimethylenetrinitramine) particles have been studied in terms of their surface properties, mechanical properties, and thermal stability. The results showed that with the increase of Si content, the stability of the emulsion reduced gradually. The material with more Si content displayed an increased thermodynamic stability, an increased high temperature resistance, an increased tensile strength and a decreased elongation at break. With the increase of Si content, the surface tension of the material decreased, the bibulous rate reduced, and the contact angle increased gradually, so that the surface tension of the polyurethane and RDX are close to each other which could improve the performance of coating.A series of nano silica/silicone modified waterborne polyurethane （WPU） have been synthesized from polytet-ramethylene glycol and isophorone diisocyanate, dihydroxymethyl propionic acid and triethylamine, ethylenediamine, trimethylolpropane, nano-SiO2 and the silane coupling agent KH550. The effect of the dosage of nano-SiO2 on the WPU-Si membrane and the coated RDX （cyclotrimethylenetrinitramine） particles have been studied in terms of their surface prop- erties, mechanical properties, and thermal stability. The results showed that with the increase of Si content, the stability of the emulsion reduced gradually. The material with more Si content displayed an increased thermodynamic stability, an increased high temperature resistance, an increased tensile strength and a decreased elongation at break. With the increase of Si content, the surface tension of the material decreased, the bibulous rate reduced, and the contact angle increased gradually, so that the surface tension of the polyurethane and RDX are close to each other which could improve the performance of coating.

关 键 词：NANO-SIO2 organic silicon waterborne polyurethane coating of RDX 

分 类 号：TQ630.1[化学工程—精细化工]