新型拉挤酚醛树脂及其复合材料的性能研究

STUDY ON A NOVEL PHENOLIC RESIN AND ITS COMPOSITES FOR PULTRUSION PROCESS

以牌号为F-613的非酸固化型拉挤酚醛树脂为研究对象,通过FTIR、GPC、流变仪、DSC等表征方法分析了该树脂的结构、分子量、粘度特性、固化特性、凝胶时间等。结果表明,该树脂的DSC曲线显示具有单一的固化峰,且固化峰温度较低,此外,高温下的凝胶时间较短,固化度较高,能够很好地满足低粘度、高活性、快速固化等拉挤工艺要求,并且工艺配方与成型工艺简单,由其所制备的复合材料与9450酚醛树脂的复合材料性能基本相当。

A novel non-acid phenolic resin named F-613 for puhrusion process was studied. The structure, mo- lecular weight, viscosity, curing properties and gelling time of this resin were characterized by ~＇FIR, GPC, rheom- eter, DSC and etc. The DSC curve of F-613 phenolic resin displayed a single exothermie peak existing lower temper- ature area contrast to 9450 phenolic resin with two exothermic peaks in higher temperature area. Moreover, F-613 phenolic resin retains shorter gel-time at high temperature. The analysis results indicated that F-613, with shorter gel-time and lower exothermie peak temperature, is more applicable to pultrusion process because of its low viscosi- ty, high activity and rapid solidification. Compared with that of 9450 phenolic resin, the formula and pultrusion process of F-613 were simpler under the condition of the same properties. The mechanical properties of glass fibre- reinforced composites shows no significant differences. But, the distinct properties of F-613 phenolic resin systems is no corrosion to mould during the pultrusion process.