采用有机硅对苯酚-尿素-甲醛共缩聚树脂进行改性,研究了有机硅的加入方式对树脂改性效果的影响,通过FT-IR对有机硅和有机硅改性PUF共聚树脂的结构进行了分析,结果表明:有机硅的加入,引起苯环的邻位、对位的亚甲基相对含量变化,形成更多的羟甲基、醚键(C—O—C和C—O—Si)。胶合强度实验表明:缩聚阶段加入树脂总质量0.3%的有机硅,可以大幅度提高树脂胶合强度。 Silicone was used to modify phenol-urea-formaldehyde co-polycondensation resin. The effect of silicone addition on resin modification was studied. The structure of silicone and silicone modified PUF copolymer was studied by FT-IR (C-O-C and C-O-Si) to form more hydroxymethyl and ether bonds, which resulted in the change of the relative content of methylene and para- . The experimental results show that the addition of 0.3% of the total mass of silicone in the polycondensation stage can greatly improve the resin bonding strength.