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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of soluble copolyurethaneimide containing oxyethylene and oxypropylene units
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Preparation of soluble copolyurethaneimide containing oxyethylene and oxypropylene units

机译：含氧乙烯和氧丙烯单元的可溶性共聚聚氨酯酰亚胺的制备

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Soluble copolyurethaneimides were synthesized by the isocyanate method in a solution of N-methyl-2-pyrrolidone (NMP). The isocyanate-terminated prepolyurethane prepared from low molecular weight polyethylene glycol) (PEG) or polypropylene glycol) (PPG) and methylene diisocyanate was reacted with pyromellitic dianhydride at high temperature. The resulting copolyurethaneimides were soluble in polar solvents like N-methyl-2-pyrrolidone and N,N'-dimethylformamide. The film-forming properties were investigated by changing the molecular weights of PEG and PPG. With PPG, the film-forming property was enhanced. The inherent viscosity, solubility, thermal property, molecular weight distribution, and mechanical property were compared with the aromatic polyimide. (C) 2002 Wiley Periodicals, Inc. [References: 17]
机译：通过异氰酸酯法在N-甲基-2-吡咯烷酮（NMP）溶液中合成可溶性共聚氨酯酰亚胺。由低分子量聚乙二醇（PEG）或聚丙二醇）（PPG）和亚甲基二异氰酸酯制得的异氰酸酯封端的预聚氨酯在高温下与均苯四甲酸二酐反应。所得共聚氨酯酰亚胺可溶于极性溶剂，例如N-甲基-2-吡咯烷酮和N，N'-二甲基甲酰胺。通过改变PEG和PPG的分子量来研究成膜性能。使用PPG，可以提高成膜性能。将特性粘度，溶解度，热性能，分子量分布和机械性能与芳族聚酰亚胺进行了比较。 （C）2002 Wiley Periodicals，Inc. [参考：17]

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