【摘要】 聚（间二乙炔基苯-甲基氢硅烷）（PSA）和含乙炔基苯并噁嗪树脂（A-PBZ）在热作用下均能够聚合形成交联网状结构。研究了PSA/A-PBZ共混树脂（SB）的固化行为。通过红外光谱（FT-IR）、旋转流变仪和差示扫描量热仪（DSC）研究了PSA/A-PBZ质量比为5∶2时共混树脂（SB-2）的固化特性,利用动态DSC分析,根据Kissinger方法和Ozawa方法计算得出SB-2共混树脂固化反应的表观活化能分别为108.4 kJ/mol、111.1 kJ/mol,反应级数分别为0.93和0.95,固化反应遵循一级反应机理。同时还对SB共混树脂体系的耐热性能进行了探究,热重分析（TGA）结果表明:在氮气和空气氛围下,SB共混树脂固化物失重5%的温度(T_d5)和1 000℃时的质量保留率均随着A-PBZ树脂加入量的增加而减小,但SB共混树脂仍然表现出优异的耐热性能。更多还原

【Abstract】 Poly（m-diethynylbenzene-methylsilane）（PSA） and acetylene-functionalized benzoxazine resin（A-PBZ） have been thermally co-polymerized to form a cross-linked structure. The curing behavior of the PSA/A-PBZ blended resins（SB） was studied. The curing properties of the SB-2 blending resins were studied by FT-IR, rheological analysis and DSC. Dynamic DSC analysis gave a value of the apparent activation energy for the curing reaction of the SB-2 blending resin of about 108 kJ/mol（using the Kissinger method） and 111 kJ/mol（using the Ozawa method） and the calculated reaction orders were 0.93 and 0.95, respectively. The curing reaction follows first-order kinetics. The heat resistance of the SB blended resin was also studied. TGA in nitrogen and air showed that the temperature for 5% mass loss(T_d5) and the residual mass at 1 000 ℃ decreased with increasing content of A-PBZ resin, but the SB blended resin still exhibited excellent heat resistance.更多还原