Abstract The flame retardant polyurethanes coatings are used to develop advanced materials due to their ability to reduce the annihilating effect. The present work deals with the synthesis of PPEEUs reacting three different molecular weights phosphate-based poly (ether- ester) polyols with two diisocyanates (IPDI and HMDI) to produce six different phosphate-poly (ether- ester- urethanes). Physico-chemical properties of polyols and polyurethanes were measured. Functional groups present in the compounds were confirmed by Fourier transform infrared spectroscopy. Structural analysis was done using NMR spectroscopy. Surface free energy results show an increase in contact angle decreases surface free energy between liquid and solid surface. The TGA results showed that a decrease in 2–3 % char yield value with an increase in the molecular weight of PPG. Mechanical properties of coatings increase with an increase in PPG molecular weight. SEM-EDX shows PPEEU is rich in phosphorus. The morphological study of represents metal substrate has excellent bonding property with polyurethanes. Results reveal that the increase in the molecular weight has excellent physical and mechanical properties but has poor thermal and flame retardant properties.

中文翻译：

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加工和表征：PPG 分子量对磷酸酯基聚氨酯性能的影响

摘要 聚氨酯阻燃涂料由于具有降低湮没效应的能力，被用于开发先进材料。目前的工作涉及 PPEEU 的合成，使三种不同分子量的磷酸基聚（醚酯）多元醇与两种二异氰酸酯（IPDI 和 HMDI）反应，以产生六种不同的磷酸酯聚（醚酯-氨基甲酸酯）。测量了多元醇和聚氨酯的物理化学性质。化合物中存在的官能团通过傅里叶变换红外光谱证实。使用NMR光谱进行结构分析。表面自由能结果表明接触角的增加会降低液体和固体表面之间的表面自由能。TGA 结果表明，随着 PPG 分子量的增加，焦炭屈服值降低 2-3%。涂层的机械性能随着 PPG 分子量的增加而增加。SEM-EDX 显示 PPEEU 富含磷。代表金属基材的形态研究与聚氨酯具有优异的粘合性能。结果表明，分子量的增加具有优异的物理和机械性能，但具有较差的热和阻燃性能。