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对苯氧基取代程度对材料力学性能和热力学性质的影响进行研究。研究结果表明,P-O-P交联体系可以使材料获得良好的力学性能和耐烧蚀性能。实验表明,当取代度为85%左右时,材料具备良好的拉伸断裂强度和断裂伸长率,以及良好的耐烧蚀性能(36.7%残碳比例)。该研究还克服了传统上未完全取代聚磷腈材料无法使用这一技术偏见。研究表明,取代度较高的苯氧聚磷腈溶液是稳定性的,并且可以浇注成需要的形状。使该类材料获得了使用价值,而且其在使用过程中可以与环境中的水反应交联使材料获得日渐优异的力学和阻燃性能。
The effect of degree of substitution of phenoxy on the mechanical properties and thermodynamic properties of the materials was studied. The results show that the P-O-P crosslinking system can make the material get good mechanical properties and ablation resistance. Experiments show that when the degree of substitution is about 85%, the material has good tensile strength at break and elongation at break, and good ablation resistance (36.7% residual carbon ratio). The study also overcomes the technical bias that traditionally did not completely replace polyphosphazene materials. Studies have shown that phenoxy polyphosphazene solutions of higher degree of substitution are stable and can be cast into the desired shape. Make this kind of material gain the use value, and it can react with water in the environment during the process of cross-linking so as to obtain the material with increasingly excellent mechanical and flame retardant properties.