酚酞基聚芳醚砜改性双酚A型氰酸酯预聚体的制备及性能研究

Preparation and Study on the Property of Bisphenol A Cyanate Prepolymer Modified with Polyarylethersulfone with Cardo Group

将酚酞基聚芳醚砜(PES-C)与双酚A型氰酸酯(BCE)共混,在一定的条件下使氰酸酯预聚,得到酚酞基聚芳醚砜与双酚A型氰酸酯共混改性预聚体系,借助FT-IR和DSC确定了固化工艺,并用扫描电镜(SEM)对预聚体及其固化物进行表征,测试了改性体系的冲击强度和对铝合金的粘接强度。结果表明,PES-C对CE起到了明显的增韧改性的作用,改性体系固化物具有较好的介电性能,在常温到230℃范围内粘接剪切性能优异(均大于20MPa)。该改性体系可用作一种新型耐高温结构胶黏剂的主体树脂。

Polyarylethersulfone with cardo group（PES-C）was blended with the bisphenol A cyanate（BCE）.Then the prepolymerization of the cyanate in the blend was conducted under a certain conditions,finally a kind of bisphenol A cyanate prepolymer systems modified with PES-C was obtained.Via FT-IR and DSC,the curing process was determined.The prepolymer and cured prepolymer was characterized by SEM separately.The impact strength and the bonding strength between aluminum alloy and the modified systems were investigated.The results showed that the PES-C polymer played a significant toughening effect on CE prepolymers and the modified systems had a good dielectric property,the shear adhesion performance was excellent from RT to 230℃（the shear strength was over 20MPa）.The modified systems could be applied as matrix resin for high temperature resistant structural adhesive.