中文摘要：

聚乙烯综合性能优良且价格低廉，但由于较低的表面能和惰性化学结构，其着色性、生物相容性及制品表面涂饰性能差，与各种涂饰剂的粘结强度很低，限制了其用途的拓展，须进行表面改性．聚乙烯制品的表面改性方法已有不少研究报道，相对而言，采用添加表面改性剂的方法在工艺上仍最为经济、简便，且容易实现工业化.

英文摘要：

Linear low-density polyethylene （LLDPE） was melt blended with styrene-maleic anhydride copolymer （SMA）. The blending films were then immersed in poly （ ethylene glycol） 400 （PEG400） at room temperature. The surface composition of the blend films was determined by Fourier transform infra-red spectroscopy coupled with an variable incidence angle attenuated total reflection accessory （ATR-FTIR）. It has been found that PEG400 was grafted onto the surface of the films via esterification with SMA. PEG immersion promoted enrichment of SMA onto the surface of the films. The water contact angle data show that grafting of PEG400 can greatly improve the hydrophilicity of the PE surface. These blending SMA and then surface grafting experiments show that surface functionalization of polyethylene films by of PEG is a feasible process, which suggest a viable and simple route for PE surface modification via blending and grafting.