The effect of using PBO and phthalandione as a combinative extender on the extension is tested.

并与苯酐联用,测定了联用效果。

And two new segmented poly(urethaneureas) were prepared from poly(tetramethylene glycol)(PTMG) or polyadipate of 1,4 butanediol(PBA), MDI and Urea(as chain extender).

以尿素为扩链剂，成了一系列聚氨酯脲热塑性弹性硬段型化。

Study of low angle laser light scattering indicats, in a certain limits of extender amount, the polyurethane have a amorph pseudomicrostructure...

解测定结果表明,本文中的聚氨酯为具有不同支化程度的可性聚。