想要一种溶剂可溶的弹性聚氨酯,文献上说Elastomeric polymer, polyurethane (PU)溶于DMF

但我查了一下好多东西都叫PU,不是学高分子的,不明白其中的区别

Poly[4,4'-methylenebis(phenyl isocyanate)-alt-1,4-butane-diol/di(propylene glycol)/polycaprolactone]

Poly[4,4'-methylenebis(phenyl isocyanate)-alt-1,4-butane-diol/poly(butylene adipate)]

Poly[4,4'-methylenebis(phenyl isocyanate)-alt-1,4-butane-diol/poly(ethylene glycol-co-propylene glycol)/polycaprolactone]

Poly[4,4'-methylenebis(phenyl isocyanate)-alt-1,4-butane-diol/polytetrahydrofuran]

查到了这四种东西

不知道哪一种能符合我的要求?



thanks
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