|
|||||
|
|
High-performance poly(methylsilane arylether arylacetylene) resins with low curing temperatures and weak secondary relaxations |
|
| Authors: | Jixian Li Changjun Gong Shuaikang Lv Junkun Tang Qiaolong Yuan Farong Huang |
| Affiliation: | 1. Key Laboratory for Specially Functional Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China;2. Key Laboratory for Specially Functional Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
Contribution: ?Investigation (supporting);3. Key Laboratory for Specially Functional Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China Contribution: Conceptualization (supporting), Methodology (supporting) |
| Abstract: | 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°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°C. |
| Keywords: | heat-resistant resins high-performance resins linking positions of benzene rings poly(methylsilane arylether arylacetylene) secondary relaxation |