SiO_2杂化环保型酚醛树脂的研究与制备  

Research and preparation of SiO_2 hybrid environment-friendly PF

作　　者：吴江涛[1] 齐暑华[1] 李春华[1] 尹必文[1] 

机构地区：[1]西北工业大学理学院化学系,陕西西安710129

出　　处：《中国胶粘剂》2011年第10期6-9,共4页China Adhesives

摘　　要：以正硅酸乙酯(TEOS)为前驱体,成功制备了玻璃纤维增强型改性PF(酚醛树脂)基复合材料的基体树脂——环保型纳米SiO2/PF。研究结果表明:当w(TEOS)=10%时,PF/SiO2复合材料的综合性能相对最好,其拉伸强度(758 MPa)、弯曲强度(945 MPa)和冲击强度(261 kJ/m2)分别比未改性体系提高了144%、53%和30%;改性PF体系的最大失重速率温度比纯PF体系提高了40～50℃,其热分解第二阶段的活化能由134.41 kJ/mol升至240.72 kJ/mol;玻璃纤维增强型PF/SiO2复合材料的线烧蚀率和质量烧蚀率分别比纯PF体系降低了22.5%和8.4%。With tetraethoxysilane （TE OS） an precursor, an environment-friendly nano-SiO2/PF （phenolic resin）, which was used as matrix resin of modified PF-based composites reinforced by fiberglass,was successfully prepared. The research results showed that the PF/SiO2 composites had reversely optimal combination property because the tensile strength （758 MPa）, bend strength （945 MPa） and impact strength （261 kJ/m2） of modified system were 144% ,53% and 30% respectively more than those of unmodified system when mass fraction of TEOS was 10%. The temperatures at maximum weight loss speed of modified PF system were 40-50 ℃ more than those of pure PF system,its activation energy at second phase of pyrolysis was increased from 134.41 kJ/mol to 240.72 kJ/mol. The ablation rate and mass ablation rate of PF/SiO2 composites reinforced by fiberglass were 22.5% and 8.4% less than those of pure PF system.

关 键 词：正硅酸乙酯 SIO2 酚醛树脂 动力学参数 耐热性 烧蚀率 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]