In situ pultrusion of urea-formaldehyde matrix composites. I. Processability, kinetic analysis, and dynamic mechanical properties

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题名:	In situ pultrusion of urea-formaldehyde matrix composites. I. Processability, kinetic analysis, and dynamic mechanical properties
作者:	Chen CH Lue JY Yen CC
贡献者:	化工系
关键词:	pultrusion urea-formaldehyde (UF) prepolymer glass fiber process feasibility kinetics dynamic mechanical properties composites
日期:	2002
上传时间:	2009-12-11 10:25:40 (UTC+8)
摘要:	We conducted a feasibility study on the pultrusion of a glass-fiber-reinforced urea-formaldehyde (UF) composite using a proprietary method. The UF prepolymer synthesized in this study was prepared from blends of UF monomer and a curing agent (NH4Cl). The process feasibility, kinetic analysis, and dynamic mechanical properties of the glass-fiber-reinforced UF composites by pultrusion were investigated. From investigations of the long pot life of the UF prepolymer, the high reactivity of the UF prepolymer, and excellent fiber wet-out, we found that the UF resin showed excellent process feasibility for pultrusion. A kinetic model, d alpha /dt = A exp(-E/RT)alpha (m)(1-alpha)(n), is proposed to describe the curing behavior of a UF resin. Kinetic parameters for the model were obtained from dynamic differential scanning calorimetry scans with a multiple-regression technique. The dynamic storage modulus of the pultruded-glass-fiber-reinforced UF composites increased with increasing die temperature, filler content and glass-fiber content and with decreasing pulling rate. (C) 2002 John Wiley & Sons, Inc. J Appl Polym Sci 83: 1242-1251, 2002.
關聯:	JOURNAL OF APPLIED POLYMER SCIENCE Volume: 83 Issue: 6 Pages: 1242-1251
显示于类别:	[化學工程與材料工程學系暨碩士班] 期刊論文

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