我们前已报道用4,4′-二苯基甲烷二异氰酸酯(MDI)与聚四次甲基醚二醇(PTMG)反应后经乙二胺(ED)扩链,制得了与美国Biomer的机械性能相似的产品。本文报道在前文基础上将扩链剂乙二胺改用己二胺(H);哌嗪(Pi);4,4′-二氨基二苯基甲烷(Me);4,4′-二氨基二苯砜(S);4,4′-二氨基二苯醚(Et)为扩链剂(Ex),采用原料配比(摩尔)为PTMG:MDI:Ex=1:2:1制备相应的嵌段聚醚氨酯弹性体,以观察不同类型的扩链剂对产物 We have previously reported that 4,4’-diphenylmethane diisocyanate (MDI) reacted with polytetramethylene ether glycol (PTMG) and ethylenediamine (ED) Performance similar products. In this paper, we reported on the basis of the previous extender ethylenediamine to hexamethylenediamine (H); piperazine (Pi); 4,4’-diaminodiphenylmethane (Me); 4,4’- diamino Diphenyl sulfone (S); 4,4’-diaminodiphenyl ether (Et) as chain extender (Ex), the corresponding molar ratio of PTMG: MDI: Ex = 1: 2: 1 Block polyether urethane elastomer to observe the different types of chain extenders on the product