期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1002/app.54875
关键词
heat-resistant resins; high-performance resins; linking positions of benzene rings; poly(methylsilane arylether arylacetylene); secondary relaxation
A series of poly(methylsilane arylether arylacetylene) (PSEA-H) resins were synthesized and their properties were investigated. The results showed that the introduction of Si-H groups reduced the curing temperatures and weakened the secondary relaxation of the resins. The cured resins exhibited excellent heat resistance and high mechanical properties when reinforced with T300 carbon fiber.
A series of poly(methylsilane arylether arylacetylene) (PSEA-H) resins were synthesized from methyldichlorosilane and isomeric arylether arylacetylenes, and characterized by 1H-NMR and FT-IR spectroscopies. The effect of reactive Si-H groups and the linking positions of benzene rings in the arylether arylacetylene units on the properties of the resins were investigated. The results show that PSEA-H resins possess good processability with processing windows of over 80 degrees C. The introduction of Si-H groups reduces the curing temperatures for PSEA-H resins and weakens the secondary relaxation for the cured PSEA-H resins. The cured resins and T300 carbon fiber (T300CF) reinforced composites display high mechanical properties. The flexural strengths of a cured PSEA-H resin and its T300CF composite at room temperature reach 64.2 and 426.5 MPa, respectively. The flexural properties depend on the linking positions of benzene rings. The cured PSEA-H resins show excellent heat resistance with a temperature of 5% weight loss (Td5) above 500 degrees C.
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