有机硅改性酚醛树脂的研究

采用有机硅改性剂通过共混法改性了热固性酚醛树脂。通过红外,热重分析以及力学性能测试研究了有机硅用量对酚醛树脂热性能和力学性能的影响。结果表明:加入的有机硅改性剂的质量分数为25%时,酚醛树脂的主体结构分解温度提高了36℃,分解速率降低了21%,最终残炭率增加了10.05%,并且拉伸强度由49.68 MPa提高到77.46 MPa,冲击强度由8.3 kJ/m2提高到11.89 kJ/m2。

Study on organic silicon modified resole resins

The thermosetting phenolic resins were modified with silicone modifier by blending method.The effect of silicone amounts on the thermal and mechanical properties of phenolic resin were investigated by IR,TGA,and mechanical property tests.The results showed that the decomposition temperature of the main structure of phenolic resin with 25% silicone modifier was increased by 36 ℃,decomposition rate was decreased by 21% and final char yield was increased by 10.05%.The tensile strength was increased from 49.68 MPa to 77.46 MPa and impact strength was improved from 8.3 kJ/m2 to 11.89 kJ/m2.