The results show that the mechanical properties of polyurethane vary with polyol, mulriisocyanate and chain-extender.
结果表明，不同的低聚物多元醇、多异氰酸酯及扩链剂对聚氨酯力学性能有较大影响；
2
In the experiment, di-isocyanate, polyether diol and a hydrophilic chain-extender were used to synthesize aqueous urethane.
实验采用二异氰酸酯与聚醚二元醇、亲水扩链剂反应合成水性聚氨酯。
3
UV curable multi-crosslinking waterbrone polyurethane paint for wood is developed by introducing UV curing procedure, organosilicane crosslinking modification and multifunctional chain-extender.