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摘要:
采用原位聚合法和浇注模压工艺合成出一系列经不同方法处理的炭纤维(CF) / 聚醚型聚氨酯(PU)弹性体。 通过机械性能测试,热失重分析和扫描电子显微镜等手段研究不同处理方法和 CF 含量对 CF/ PU 弹性体复合材料的物理机械性能、热性能和微观形态的影响。 结果表明,偶联剂中以胺基硅烷 KH5501、KH602 和钛酸酯类 TCA-K44 处理 CF 对 CF/ PU 复合材料的机械性能改善效果明显;硝酸氧化的 CF 对复合材料的机械性能和热稳定性均明显改善;硝酸氧化处理 CF 与 PU 间的黏接性优于偶联剂处理 CF/ PU 间的黏接性。
Abstract:A series of carbon fiber (CF) / polyether polyurethane (PU) composites were prepared by in situ polymerization and a casting compression molding technique. The influence of CF content and its pretreatment with a coupling agent and oxidation by 65%-68% (mass fraction) nitric acid on the mechanical performance, thermal properties and morphology of the composites was investigated by TGA, SEM and mechanical tests. Results showed that coupling agents improve the mechanical performance of the CF/ PU composites, especially for silane coupling agents KH5501, KH602 and the titanate coupling agent TCA-K44. Nitric acid oxidation also improved the mechanical performance and thermal stability of the composites. The adhesion between PU and nitric acid-oxidized CFs was better than that between PU and fibers treated with silane coupling agents.
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Key words:
- Carbon Fiber /
- Polyurethane /
- Composites /
- Mechanical properties /
- Thermal stability
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