LDPE与LLDPE共混树脂薄膜的研究

摘要

LLDPE and LDPE were blended and blown to make a series of films.The rheological properties of the blending resin were measured. The crystallization of the blending resin was investigated. The mechanical properties and the thermal stability of the films were studied.The result show that the pure resin melt and the blending resin melt were all pseudoplastic fluid, and the apparent viscosities of the blending resin de-crease with the increasing of the temperature.The mechanical properties of the blending resin films were better than those of pure LDPE films.The thermal stability reaches best when the content of LDPE is 70%.%将线性低密度聚乙烯(LLDPE)与低密度聚乙烯(LDPE)经过熔融共混、挤出吹制得一系列薄膜.分析了共混树脂的流变性能,研究了共混树脂的结晶性能,讨论了薄膜的力学性能和热稳定性能.结果表明:纯树脂和共混树脂熔体都是假塑性流体,通过升温同样可以降低共混树脂的表观黏度,共混树脂薄膜的力学性能优于纯LDPE薄膜,LDPE质量分数为70%的薄膜热稳定性最佳.