A kind of azo dye DYE-R was got by coupling reaction of diazonium salt of Congo red with 2-amino-8-naphthol-6-sulfonic acd. The colorful polaroid films were obtained by extension,racking and desiccation after mixing DYE-R with polyvinyl alcohol(PVAL).是什么意思_A kind of azo dye DYE-R was got by coupling reaction of diazonium salt of Congo red with 2-amino-8-naphthol-6-sulfonic acd. The colorful polaroid films were obtained by extension,racking and desiccation after mixing DYE-R with polyvinyl alcohol(PVAL).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句