It was proved that the modified PVA has ortho-nitrogen radicals by molecular structure analysis through infrared spectrum.
通过红外光谱分析了改性多元醇防塌剂的分子结构，证明阳离子化反应引入了正氮基团；
It was proved that the modified PVA has ortho-nitrogen radicals by molecular structure analysis through infrared spectrum.
通过红外光谱分析了改性多元醇防塌剂的分子结构，证明阳离子化反应引入了正氮基团；
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