连续法制备短切石英纤维/酚醛树脂预混料的固化反应动力学及其模压制品性能  

Curing reaction kinetics and properties of the molded products for a chopped quartz fiber/phenolic resin premix prepared by a continuous method

作　　者：王齐崧 宋金梅[1] 杨帆 张薇[1] 张翠妙[1] WANG QiSong;SONG JinMei;YANG Fan;ZHANG Wei;ZHANG CuiMiao(Beijing Composite Materials Co.,Ltd.,Beijing 102101,China)

机构地区：[1]北京玻钢院复合材料有限公司,北京102101

出　　处：《北京化工大学学报（自然科学版）》2024年第1期49-58,共10页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：采用连续浸胶法,使用自制的压辊式浸胶槽制备了短切石英纤维/酚醛树脂预混料,通过红外光谱法(FT-IR)、热重分析法(TG)和差示扫描量热法(DSC)对预混料进行了表征,并研究了其固化反应动力学。结果表明,溶剂乙醇影响石英纤维的浸胶过程,连续法制备的石英纤维/酚醛树脂预混料能够降低乙醇的影响;预混料的固化工艺参数为:凝胶温度108.40℃,固化温度183.04℃,后处理温度264.47℃;固化反应级数为0.95,固化反应动力学模型为:dα/dt=Aexp(-ΔE/RT)(1-α)n=4.3×10^(12)exp(-140.74/RT)(1-α)0.95。使用模压法对所制备的预混料进行压制,得到石英纤维/酚醛树脂复合材料的模压制品,该模压制品在800℃下的质量残留率为82.3%,拉伸强度为58 MPa,断裂伸长率为0.353%,剪切强度为105 MPa,线烧蚀率为0.088 mm/s,烧蚀表面形貌未见异常,结果表明采用连续法制备的石英纤维/酚醛树脂预混料的模压制品具有较好的耐热性、烧蚀性和力学性能。A chopped quartz fiber/phenolic resin premix was prepared by a continuous dipping method using a self-made pressure roller dipping tank.The premix was characterized by infrared spectroscopy(FT-IR),thermogravimetric analysis(TG)and differential scanning calorimetry(DSC),and the curing reaction kinetics was studied.The results show that the ethanol solvent affects the impregnation of the quartz fiber,and the quartz fiber/phenolic resin premix prepared by the continuous method can reduce the influence of ethanol.The curing process parameters of the premix were as follows:gel temperature of 108.40℃,curing temperature of 183.04℃,and post-treatment temperature of 264.47℃.The curing reaction order is 0.95,and the curing reaction kinetic model is as follows:dα/dt=A·exp(-ΔE/RT)(1-α)^n=4.3×10^(12)·exp(-140.74/RT)(1-α)^(0.95).The quartz fiber/phenolic resin composite molded products were obtained by pressing the prepared premix using the molding method.The mass residual rate of the molded product at 800℃ was 82.3%,the tensile strength 58 MPa,the elongation at break 0.353%,the shear strength 105 MPa,and the linear ablation rate 0.088 mm/s,and no abnormalities were observed in ablation surface morphology.The results show that the molded products of the quartz fiber/phenolic resin premix prepared by the continuous method have good heat resistance,ablation resistance and mechanical properties.

关 键 词：连续法 石英纤维 酚醛树脂 预混料 固化反应动力学 性能 

分 类 号：TQ320.9[化学工程—合成树脂塑料工业]