碳纤维布增强的改性含硅芳炔树脂基复合材料的制备和性能

Preparation and Properties of Modified Silicon-containing Arylacetylene Resin Composite Reinforced by Carbon Fiber Cloth

先合成双酚A型含硅芳炔醚(SAPE-BA)和二苯醚型含硅芳炔醚(SAPE-DPE)树脂并表征其结构,再将其与含硅芳炔树脂(PSA)共混得到改性树脂PSA/SAPE-BA和PSA/SAPE-DPE,用热模压法制备碳纤维布增强的改性PSA树脂基复合材料,研究了改性PSA树脂的加工工艺性能、热性能、力学性能和复合材料的力学性能。结果表明,与PSA树脂相比,改性PSA树脂不但具有较好的加工性能,还具有较好的耐热性能。两种改性PSA树脂的玻璃化转变温度(Tg)都高于500℃,在氮气中5%热失重温度(Td5)分别达550℃和590℃;这两种改性树脂浇注体的弯曲强度分别提高了78.3%和54.2%;碳纤维布T300增强PSA/SAPE-BA共混树脂基复合材料的弯曲强度和层间剪切强度(ILSS)分别提高了38.4%和33.5%;碳纤维布T300增强PSA/SAPE-DPE树脂复合材料的弯曲强度和ILSS分别提高了23.4%和21.8%。

Silicon-containing aryl propargyl ether of bisphenol A（SAPE-BA） and silicon-containing aryl propargyl ether of diphenyl ether（SAPE-DPE） were synthesized and characterized. Then they were used to modify the silicon-containing arylacetylene resin（PSA） respectively by blend process. The modified PSA resins（PSA/SAPE-BA and PSA/SAPE-DPE） were reinforced with T300 carbon fabric to form composites of PSA resins by hot press. The processability, thermal stability, and the mechanical properties of the modified resins and their composites were further investigated. Results show that the modified PSA resins have not only good processing performance, but also high heat-resistance. In comparison with the cured simple PSA resin, the temperature at which 5% mass loss（Td5） of the two cured modified PSA resins in nitrogen were higher than 550℃ and 590℃, respectively, and the Tgof the cured modified PSA resins were higher than 500℃; The flexural strength of the cured modified resins, PSA/SAPE-BA and PSA/SAPE-DPE increased by 78.3% and 54.2%, respectively. While in comparison with the composite of T300 carbon fabric（T300 CF） reinforced simple PSA, the flexural strength and interlayer shearstrength（ILSS） of the composite of T300 carbon fabric（T300 CF） reinforced PSA/SAPE-BA resin increased by 38.4% and 33.5%, and the flexural strength and ILSS of the composite of T300 CF reinforced PSA/SAPE-DPE resin increased by 23.4% and 21.8%, respectively.