Abstract Poly (butylene succinate-co-butylene-3-hydroxyphenylphosphinyl-propionate) (PBSH) was synthesized through polycondensation. Then, 4,4′-methylene diphenyl diisocyanate (MDI) was introduced into PBSH matrix by reactive blending. The chemical structure and properties of the blending products were investigated using Fourier Transform Infrared Spectroscopy (FT-IR), differential scanning calorimetry (DSC), limiting oxygen index (LOI) tests, thermogravimetric analysis (TGA), and vertical burning tests. The results proved that MDI can improve the mechanical properties and flame retardancy of PBSH. In addition, it was found that the crosslinking structure can reduce the hydrolysis rate of PBSH and effectively eliminate the melt-dripping of PBSH during combustion.

中文翻译：

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使用二异氰酸酯提高聚（丁二酸丁二醇酯-共-丁二醇 3-羟基苯基膦基-丙酸酯）（PBSH）的阻燃、机械和结晶性能

摘要 通过缩聚反应合成了聚（丁二酸丁二醇酯-共-丁烯-3-羟基苯基膦基-丙酸酯）（PBSH）。然后，通过反应共混将 4,4'-亚甲基二苯基二异氰酸酯 (MDI) 引入 PBSH 基质中。使用傅里叶变换红外光谱 (FT-IR)、差示扫描量热法 (DSC)、极限氧指数 (LOI) 测试、热重分析 (TGA) 和垂直燃烧测试来研究共混产物的化学结构和性质。结果证明MDI可以提高PBSH的力学性能和阻燃性。此外，还发现交联结构可以降低PBSH的水解速率，有效消除燃烧过程中PBSH的熔滴。