硅氮烷改性含硅芳炔树脂及其复合材料的性能

采用胺解法合成了二(3-乙炔基苯胺) -二甲基硅烷(SZ),并与含硅芳炔(PSA)树脂熔融共混制

备了PSA/ SZ。利用一系列测试手段考察了PSA/ SZ 树脂的流变行为、固化反应、热稳定性、弯曲、介电性能以

及石英布增强PSA/ SZ 复合材料的力学性能。结果表明,硅氮烷SZ 的加入有效降低了PSA/ SZ 树脂的黏度,

PSA/ SZ 浇铸体的弯曲强度提高了62. 7%,石英纤维增强PSA/ SZ 复合材料的弯曲和层剪强度分别提高了

18． 7%和60. 4%。

Properties of A Silicon-Containing Arylacetylene Resin ModifiedWith Silazane and Its Composite

A silicon-containing arylacetylene resin( PSA) was modified by blending bis(3-acetylenephenyl)

dimethylsilazane(SZ) synthesized by an aminolysis procedure. A series of test methods were used to investigate the

rheological behavior, curing reaction,thermal stability,flexural and dielectric properties of PSA/ SZ. The mechanical

properties of quartz fiber reinforced composites were also measured. The results show that with the increase of SZ, the

viscosities of PSA/ SZ resins decrease remarkably, the flexural strength of PSA/ SZ resin increases by 62. 7%, the

flexural strength and interlaminar shear strength of quartz fiber reinforced PSA/ SZ resin composite increase by 18. 7%

and 60. 4%, respectively.