LDPE环境应力开裂性研究

STUDY ON THE ENVIRONMENTAL STRESS CRACKING OF LOW DENSITY POLYETHYLENE

研究了低密度聚乙烯接枝聚硅氧烷后的环境应力开裂性。用红外光谱分析了低密度聚乙烯与聚硅氧烷接枝反应的过程,并用电子扫描显微镜分析了接枝后聚乙烯环境应力开裂的断面形态。实验结果表明,接枝聚硅氧烷后,增加了聚乙烯分子间链缠结,晶粒间连接分子数增多,因而提高了它的耐环境应力开裂性。

Siloxane was grafted on the low density polyethylene to improve the property of the environmental stress cracking of low density polyethylene. Result of infrared spectroscopy shows that graft polymerization takes place between low density polyethylene and siloxane. And scanning electron microscope was employed to analyse the fracture surface of environmental stress cracking of low density polyethylene. Showing that the environmental stress cracking of low density polyethylene is improved after grafting because there are more amorphous tie molecules than ever.