diphenylmethane的音标：diphenylmethane的英式发音音标为：[daɪfenɪl'meθeɪn]diphenylmethane的美式发音音标为：[daɪfenɪl'meθeɪn]...

A kind of polyetherester polyurethane was synthesized by polyetherester polyol, 4 , 4� � - diphenylmethane diisocyanate and 1, 4 - dihydroxybutane.制备了以自制聚醚酯多元醇 、 二异氰酸酯和1, 4- 丁二醇交联剂为原料合成的聚氨酯弹性体,研究了其力学性能....

n.二苯基甲烷...