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以苯酚、腰果酚、甲醛为原料,NaOH为催化剂,乙二醇为助剂,合成了可发性酚醛树脂,通过粘度,固含量,韧性测试研究了原料的配比,腰果酚替代苯酚的比例,催化剂用量,反应时间,反应温度及乙二醇用量对合成树脂性能的影响并通过IR,TG分析对树脂结构及耐热性进行了表征。结果表明,适宜的反应条件为:F/P比(甲醛与总酚物质的量比值)1.6,腰果酚替代量20%,催化剂用量1%,反应时间3 h,反应温度80℃,乙二醇质量分数10%～15%。以腰果酚制备的CPF树脂耐热性变化不明显,拉伸强度为22.34 MPa,断裂伸长率3.08%,冲击强度3.56 kJ/m2,较PF树脂有很大提高。
Using phenols, cardanol and formaldehyde as raw materials, NaOH as catalyst and ethylene glycol as auxiliary, a kind of phenolic resin was synthesized. The ratio of raw materials, the proportion of substituted phenol , The amount of catalyst, the reaction time, the reaction temperature and the amount of ethylene glycol on the properties of the synthetic resin were investigated. The resin structure and heat resistance were characterized by IR and TG. The results showed that the suitable reaction conditions were as follows: F / P ratio (the ratio of formaldehyde to total phenols) 1.6, the substitution of cardanol 20%, the amount of catalyst 1%, the reaction time 3 h, the reaction temperature 80 ℃, Mass fraction 10% ~ 15%. The heat resistance of CPF resin prepared from cardanol did not change obviously, the tensile strength was 22.34 MPa, the elongation at break was 3.08% and the impact strength was 3.56 kJ / m2, which was much higher than that of PF resin.