The phenomonon was explained in view of the mechanism of chemical cyclization of amic acid.
从聚酰胺酸化学环化反应机理出发对这一结果给予了解释.
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Two new derivatives of 4 - dicyanomethylene - 2 , 6 - dimethyl - 4 H - pyran and the corresponding poly ( amic acid ) were synthesized and characterized.
两种新的 4- 二氰亚甲基 -2, 6- 二甲基 -4H- 吡喃衍生物及对应的聚酰胺酸被合成和表征.
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