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1.Two new derivatives of 4 - dicyanomethylene - 2, 6 - dimethyl - 4 H - pyran and the corresponding poly ( amic acid ) were synthesized and characterized.

兩種新的 4- 二氰亞甲基 -2, 6- 二甲基 -4H- 吡喃衍生物及對(duì)應(yīng)的聚酰胺酸被合成和表征.

2.The reaction between 1,5 - naphthalenediamine ( NDA ) and bis ( trichloromethyl ) carbonate ( BTC ) was studied.

探討了二( 三氯甲基 ) 碳酸酯 ( BTC)和1,5萘二胺( NDA ) 合成1,5萘二異氰酸酯(NDI ) 的反應(yīng).

3.The propanedinitrile is synthesised from ethyl cyanoacetate by amination and elimination reaction.

由氰乙酸乙酯與氨反應(yīng)生成氰乙酰胺,再經(jīng)過(guò)消除反應(yīng)制得丙二腈.

4.A polyamide imide was synthesized from trimellitic anhydride and di isocyanate.

本文用偏苯三酸酐和二異氰酸酯合成了一種新型聚酰胺酰亞胺.

5.Sodium thiocyanate ( NaSCN ) and dimethylacetamide ( DMAC ) two - step process technologies were regarded as reasonable ch.

建議選用硫氰酸鈉二步法及二甲基乙酰胺( DMAC ) 二步法 腈綸工藝.

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