聚氨酯改性不饱和聚酯/色浆复合体系的固化特性  

CURING CHARACTERISTICS OF POLYURETHANE MODIFIED UNSATURATED POLYESTER RESIN /COLOR PASTE MIXTURES

作　　者：史小靖[1] 潘吉林[1] 解孝林[2] 

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [2]华中科技大学化学与化工学院大型电池材料与系统教育部重点实验室,武汉430074

出　　处：《高分子学报》2013年第11期1407-1411,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金国际重大合作项目(基金号51210004)资助

摘　　要：系统研究了聚氨酯改性不饱和聚酯/色浆复合体系的黏度与固化特性,发现随着色浆含量的增加,复合体系的黏度呈递增趋势,但明显低于理论加和值;而复合体系的凝胶时间、表观起始固化温度与表观峰值固化温度随着色浆含量的增加而增加,但表观终止固化温度与固化热焓却降低;随着升温速率的增大,复合体系的特征固化温度均向高温方向移动,但固化热焓基本不变.将升温速率外推至零,可计算出体系的起始固化温度、峰值固化温度以及终止固化温度,从而确定体系的固化工艺.同时基于不同升温速率下的表观峰值固化温度,通过Kissinger方程可计算得到聚氨酯改性不饱和聚酯/色浆复合体系的固化反应表观活化能以及固化反应动力学指前因子.在最佳固化工艺条件下,聚氨酯改性不饱和聚酯树脂/色浆复合涂层的黏附力均在一级以上.Viscosity and curing characteristics of polyurethane modified unsaturated polyester （PU-UPES）/color paste mixtures were systematically studied.The results showed that the viscosity of PU-UPES/color paste mixtures tends to increase with the content of the color paste,but the experimental data of viscosity are lower than the theoretical additive data.With the increasing of the color paste content,all of the gelation time,the apparent initial curing temperature and the apparent peak curing temperature increase accordingly,while the apparent final curing temperature and the enthalpy decrease.With the increasing of the heating rate,the curing characteristic temperatures of composite systems shift toward higher temperature values when the composite under the same content of color paste,but the curing enthalpy values are almost constant.Meanwhile,based on the the apparent peak curing temperature at different heating rates,the apparent activation energy and the preexponential factor of PU-UPES/color paste mixture curing reaction can be calculated through the Kissinger equation.The initial curing temperature,the peak curing temperature and the final curing temperature are calculated by the extrapolation method in order to optimize the curing process.Based on the optimum curing process,the adhesion grades of PU-UPES/color paste coatings are above the first level.

关 键 词：聚氨酯改性不饱和聚酯树脂 色浆 固化特性 黏附力 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]