丙烯酸聚氨酯涂料成膜过程(Ⅰ)溶剂扩散系数的估算

化工学报 ›› 2003, Vol. 54 ›› Issue (10): 1442-1445.

丙烯酸聚氨酯涂料成膜过程(Ⅰ)溶剂扩散系数的估算

夏正斌;涂伟萍;陈焕钦

华南理工大学化工学院，广东广州 510640

出版日期:2003-10-25 发布日期:2003-10-25

FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS

XIA Zhengbin;TU Weiping;CHEN Huanqin

Online:2003-10-25 Published:2003-10-25

摘要/Abstract

摘要： 采用傅里叶变换红外光谱（FTIR）测定了不同时间下丙烯酸聚氨酯涂料体系成膜聚合物的固化度及固化反应速率常数，并将该体系按二元聚合物-溶剂体系进行简化处理，在Vrentas-Duda自由体积理论模型的基础上，利用Di-Benedetto方程关联了溶剂的扩散系数与涂膜的固化度，建立了涂膜中溶剂扩散系数的预测模型.结果表明，本涂膜体系中溶剂扩散系数是溶剂浓度、干燥时间的函数.

关键词:

丙烯酸聚氨酯涂料, 成膜过程, 扩散系数

Abstract: In this paper, the curing extent of polymer film and the reaction speed constant of the crosslinking and curing in the acrylic polyurethane coating system were determined by FTIR analysis. The film-formation process of this coating system was simply treated as that of a binary polymer-solvent system. On the basis of Vrentas-Duda free volume theory, the diffusion coefficient of solvent and the reaction extent of film-formation polymer are correlated by introducing Di-Benedetto equation, and the self and mutual diffusion coefficients of the solvent in this system were calculated.It was shown that the diffusion coefficients of the solvent in such a thermosetting coating were dependent on solvent concentration and drying time.

Key words:

丙烯酸聚氨酯涂料, 成膜过程, 扩散系数

夏正斌, 涂伟萍, 陈焕钦. 丙烯酸聚氨酯涂料成膜过程(Ⅰ)溶剂扩散系数的估算 [J]. 化工学报, 2003, 54(10): 1442-1445.

XIA Zhengbin, TU Weiping, CHEN Huanqin. FILM-FORMATION PROCESS OF ACRYLIC POLYURETHANE COATING SYSTEM(Ⅰ)ESTIMATION OF SOLVENT DIFFUSION COEFFICIENTS[J]. CIESC Journal, 2003, 54(10): 1442-1445.

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