Two series of thermotropic liquid crystalline polyureas were synthesized by the copolymerization of benzidine (or o-tolidine),1,6-hexane diamine and 2,4-toluene diisocyanate.
为
新型热致液晶聚
，
液晶基元的联苯二
（或联邻甲苯）、1，6-己二、2，4-甲苯二异氰酸酯为原料进
。
Two series of thermotropic liquid crystalline polyureas were synthesized by the copolymerization of benzidine (or o-tolidine),1,6-hexane diamine and 2,4-toluene diisocyanate.
为新型热致液晶聚，液晶基元的联苯二（或联邻甲苯）、1，6-己二、2，4-甲苯二异氰酸酯为原料进。
Toluene diisocyanate (TDI) is one of the most useful kinds of isocyanateth that is produced by the method of phosgenation of amine.
甲苯二异氰酸酯(TDI)是异氰酸酯化物中应用最广泛的品种之一,其工业生产主要采用光化法。
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