Determination of Crosslinking and Grafting in Polyurethane-acrylic Hybrid Material and Their Theoretical Calculations

被引：0
作者：
JIANG Xubao ZHU Xiaoli ZHANG Zhiguo KONG Xiangzheng and TAN Yebang College of Chemistry and Chemical Engineering Shandong University Jinan P R China College of Chemistry and Chemical Engineering University of Jinan Jinan P R China [1 ,2 ,2 ,2 ,2 ,1 ,1 ,250100 ,2 ,250022 ]
机构：
来源：
Chemical Research in Chinese Universities | 2011年 / 27卷 / 01期
关键词：
Polyurethane; Graft copolymer; Hybrid latex; Grafting calculation; Coupling agent;
D O I：
暂无
中图分类号：
O631.3 [高聚物的化学性质];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A theoretical method to calculate the mode of polyurethane(PU) prepolymers grafted to polyacrylic(PAC) was presented. Using hydroxyethyl acrylate(HEA) as coupling agent, polyurethane-acrylics(PU-AC) hybrid latexes were prepared with varying HEA level and the reaction of HEA with PU prepolymers at different temperatures, and PU grafted to PAC was experimentally determined. The results show that PU grafted to PAC regularly increased, and the non-grafted and linear free PU regularly decreased with increase in HEA/NCO(isocyanate group). The grafted PU on PAC was not proportional to HEA. More than half of linear PU prepolymers were grafted to PAC when HEA was at a low level with HEA/NCO at 0.33. While grafted PU increased to 84.80%(mass fraction), when HEA/NCO increased to 1.0. The results were interpreted based on the theoretical calculation of PU grafted to PAC by the present method.
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页码：154 / 157
页数：4
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