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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.

为合成新型热致聚脲,以胺(或邻甲胺)、1,6-己胺、2,4-甲异氰酸酯为原料进行合成。

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geologic, geologic time, geological, geological formation, geological time, geologically, geologically speaking, geologician, geologist, geologize,

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3G, 401(K), a,

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