酚醛树脂胶粘剂的复合改性

Composite Modify of Phenol-formaldehyde Resin Adhesive

采用有机硅和蔗糖对酚醛树脂胶粘剂进行复合改性,以提高树脂胶膜的柔韧性,并使产品具有较高的粘接强度。通过考察改性剂有机硅种类、改性剂加入时间、加入量对产品性能的影响,结果发现:在反应开始时加入总质量1.5%的有机硅(8427)和总质量0.9%的蔗糖,反应所得产品分子量及粘度适中,粘接强度高达6MPa,游离甲醛含量低至0.067%。采用FT-IR和TG对产品结构及性能进行分析,由此可知,改性后的酚醛树脂胶粘剂有大量—Si—O—生成,其柔韧性和耐热性有很大的提高。

Silicones and sugar were adopted to modified phenol-formaldehyde resin to increase the flexibility of adhesive film with high intensity of glue. The species, mass of inclusion, time of inclusion of modifier was examined . It shown that the phenol-formaldehyde resin adhesive was prepared by the way that the organic silicon（8427） was 1.5% in total mass and sugar was 1.5% in total mass were jdined in 45℃. Which the free formaldehyde content in resin was lower then 0.067%, strength of tensile shear was over 6MPa. The structure and functional were characterized by FT-IR and TG. It was shown that lots of --Si--O-- were formed, the strength of tensile and thermal resistance were increased in a much degree.