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.
为合成新型热致液晶聚脲，以含液晶基元的联苯二
（或联邻甲苯）、1，6-己二、2，4-甲苯二异氰酸酯为原料进行合成。
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.
为合成新型热致液晶聚脲，以含液晶基元的联苯二（或联邻甲苯）、1，6-己二、2，4-甲苯二异氰酸酯为原料进行合成。
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)是异氰酸酯化合物中应
最广泛的品
,其工业生产主要采光化法。
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