It was found that polyphenyloxamidines do not melt up to 280°C but undergo an end-group condensation reaction and imino group crosslinking with liberation of ammonia, producing hard infusible and insoluble (in all solvents, sulfuric acid included) black powders.
imino group crosslinking with liberation of ammonia
アンモニアの遊離で架橋するイミノ基
No comments:
Post a Comment