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高密度聚乙烯和低密度聚乙烯如何区别？

2025-03-28 22:32:06

推荐回答（1个）

回答1：

通常可用比重法区别两种聚乙烯，高密度的比重可达0.93-0.94，低密度的仅有0.9-0.91。另外，尚可用红外光谱分析法，低密度聚乙烯的支链较多，在1380波数的谱峰很明显，代表甲基。而高密度聚乙烯的支链少，此处的谱峰很低或没有。

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