不同异氰酸酯固化的蓖麻油／酚氧树脂聚氨酯的力学性能

Mechanical Properties of Castor Oil/Phenoxy Resin Polyurethane Cured with Different Diisocyanates

以ＢＦ３·ＯＥｔ２为催化剂，４，４－二羟基二苯基丙烷与环氧氯丙烷反应，生成端羟基的酚氧树脂（Ａ），Ａ与蓖麻油（Ｂ）混合，用３种异氰酸酯（ＴＤＩ、ＩＰＤＩ和ＨＤＩ）作为固化剂，制得交联聚氨酯。研究了这３种聚氨酯的力学性能及形态与组成和二异氰酸酯结构的关系；改变ＮＣＯ／ＯＨ摩尔比及Ｂ与Ａ的质量比，可以制得具有较好力学性能的聚氨酯材料。蓖麻油，酚氧树脂，聚氨酯。

The hydroxy-terminated phenoxy resin was prepared by the reaction of bisphenol-A and epichlorohydrin using BF3.OEt2 as a catalyst,and then mixed with castor oil and reacted with toluene diisocyanate,hexamethylene diisocyanate and isophorone diisocyanate,respectively,to give a series of polyurethanes.The mechanical properties of the polyurethanes with various compositions were investigated.Under optimum content of castor oil and NCO/OH mole ratio,a series of polyurethanes with good mechanical properties have been obtained.