改性聚乙烯防雾薄膜的性能研究

摘要

用表面活性剂对聚乙烯(PE)树脂进行改性,制备防雾薄膜,使其具有防雾作用.以聚乙烯蜡乳液(WE1)为分散剂,防雾母粒(YS)、聚甘油脂肪酸酯(PGFE)作为防雾剂,对PE树脂进行改性,混合造粒后流延制备出聚乙烯防雾薄膜.研究了改性聚乙烯薄膜的微观结构、防雾性能、力学、光学、透气、透湿及热稳定性能.结果表明,防雾剂与聚乙烯薄膜相容性好,改善了聚乙烯薄膜的阻隔性,并且使薄膜具有优良的防雾性能.YS的加入使薄膜拉伸强度增大,当YS,PGFE分别以2%复配时,薄膜透光率为86.22%,拉伸强度为8.63 MPa,断裂伸长率为453.31%,高温防雾时间可达232 h,可以作为防雾包装薄膜使用.%Surface modification on polyethylene (PE) resin was carried out with surfactants to fabricate antifogging films.The antifogging polyethylene films with polyethylene wax emulsions (WE1) as a dispersant, homemade antifog masterbatch (YS) and polyglycerol fatty acid ester (PGFE) as antifoggants were prepared by extrusion casting after mixing granulation.The microstructure, antifogging properties, mechanical, optical, air and moisture permeability and thermostability of modified polyethylene films were studied.The results showed that the compatibility among antifogging agents and polyethylene films were good.The modified polyethylene films have excellent obstructing and antifogging performance.With the enhance of the YS, the tensile strength of the film increased, the light transmittance reached 86.22%, tensile strength was 8.63MPa, the elongation at break was 453.31% and the high temperature antifogging periods reached 232h as the contents of YS and PGFE were 2%, respectively.It makes the film have promising application as a kind of antifogging packaging material.