聚甲基二间苯二乙炔基硅烷改性二氧化双环戊二烯环氧树脂及其复合材料的性能

Properties of Composite Material of Dicyclopentadiene Dioxide Resin Modified with Poly(methyl-benzene diethynylbenzene) Silane

用聚甲基二间苯二乙炔基硅烷树脂(PSA)改性二氧化双环戊二烯(R-122环氧树脂)得到R-122/PSA树脂体系,并以该树脂为基体制备了玻璃纤维复合材料。通过FT-IR、DSC和TGA研究了R-122/PSA树脂的固化反应及其耐热性能,同时研究了R-122/PSA基复合材料的力学性能、耐热性能、介电性能和耐水性能。结果表明:改性树脂在高温下保持了良好的耐热性能,mPSA/mR-122=0.2的固化物在800°C下质量保留率比纯R-122树脂的提高了30%。所制备的复合材料常温下弯曲强度达到735 MPa,220°C下的弯曲强度达到418.4 MPa,不仅保留了良好的力学性能,而且耐热性能得到了很好的提升,同时其浸泡96 h后的吸水率仅为0.65%,耐水性能优异。

Poly（methyl-benzene diethynylbenzene） silane（PSA） was used to modify dicyclopentadiene dioxide to give R-122/PSA,which was then fabricated into fiber reinforced composites.The curing mechanism and heat resistance of R-122/PSA were investigated by FT-IR、DSC and TGA.The mechanical strength,dielectric and water resistance properties of the fiber reinforced composite were studied.Results showed that the quality retention of R-122/PSA（mPSA/mR-122=0.2） was 30% higher than R-122 at 800 °C in nitrogen.The flexural strength of the composites was 735 MPa at room temperature and reached the maximum of 418.4 MPa at 220 °C.The water absorbing ratio of the composites in water for 96 h was up to 0.65%.R-122 modified with PSA can keep good mechanical properties and excellent heat resistance.