Preparation And Characterization Of The Functional Polyethylene

Three series of novel nonionic surfactants were synthesized. Three series of grafted copolymers were prepared by using the surfactants and linear low density polyethylene as starting materials. The grafting reaction was carried out by using melt reactive extrusion procedure.The first series of surfactants a, b, c, d, e and their acrylates A, B, C, D and E were synthesized by using stearoyl chloride and poly(ethylene oxide)(PEO)(200, 600, 1000, 2000, 6000) as the main starting materials. Their chemical structures were characterized by means of FTIR and 1H-NMR. The surface tensions (γ) of a, b, c, d and e were evaluated by maximum bubble pressure method. A, B, C, D and E were adopted as the grafting monomers of LLDPE, and grafting reaction was carried out by using melt reactive extrusion procedure. Their thermal properties of grafted copolymers were studied by using DSC, and their surface properties were characterized by measuring contact angle, XPS and WAXD. It was found that their surface tension increased with the molecular weight of PEO, their crystallization temperature and crystallization degrees of grafted copolymers were higher than that of the plain LLDPE. The hydrophilic property of the grafted copolymers was better than the plain LLDPE.The second series of surfactants I, II, III, IV and V were synthesized by using perfluoro-polyoxyethylene ether and poly (ethylene oxide) (PEO) (200, 600, 1000, 2000, 6000) as the main starting materials. TDI was adopted as the space groups.Their chemical structures were characterized by means of FTIR and 1H-NMR. Their surface tensions were evaluated by maximum bubble pressure method. I, II, III, IV and V were adopted as the grafting monomers of LLDPE, and grafting reaction was carried out by using melt reactive extrusion procedure. Their thermal properties of grafted copolymers were studied by using DSC, their surface properties were characterized by measuring contact angle, XPS and WAXD. It was found that their surface tension increased with the molecular weight of PEO. Their crystallization temperature and crystallization degrees of grafted copolymers were higher than that of the plain LLDPE. The hydrophilic property of the grafted copolymers was better than the plain LLDPE. The third series of surfactants x, y ,z and their acrylates X, Y, Z were synthesized by using poly(dimethysiloxane) and poly (ethylene oxide) (PEO) (200,600, 1000) as the main starting materials. TDI was adopted as the space groups. Their chemical structures were characterized by means of FTIR and 1H-NMR. The surface tensions of x, y, z were evaluated by maximum bubble pressure method. X, Y, Z were adopted as the grafting monomers of LLDPE, and grafting reaction was carried out by using melt reactive extrusion procedure. Their thermal properties of grafted copolymers were studied by using DSC, their surface properties were characterized by measuring contact angle, XPS and WAXD. It was found that their surface tension increased with the molecular weight of PEO. Their crystallization temperature and crystallization degrees of grafted copolymers were higher than that of the plain LLDPE. The hydrophilic property of the grafted copolymers was better than the plain LLDPE.