The Synthesis Of New Kind Of Surfactants And Their Reactive Extrusion With Ling Low-density Polyethylene

Two series of novel nonionic Gemini surfactants were synthesized. Two series of grafted copolymers were prepared by using the Gemini surfactants and linear low density polyethylene as starting materials. The grafting reaction was carried out by using melt reactive extrusion procedure.One series of surfactants a, b, c, d, e and their acrylates A, B, C, D and E, were synthesized by using perfluoro-polyoxyethylene ether and poly(ethylene oxide)(PEO)(200, 600, 1000, 2000, 5000) as the main starting materials. Toluene diisocyanate was adopted as the space groups. Their chemical structures were characterized by means of FTIR and 1H NMR. The surface activities and 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 surface properties were characterized by measuring contact angle and XPS. It was found the hydrophilic property of the grafted copolymers was better than the plain LLDPE. Thermal properties of grafted copolymers were studied by using DSC. It was also found that their crystallization temperature of grafted copolymers were higher than that of the plain LLDPE.Another series of surfactants and their acrylates were synthesized by using nonylphenol polyoxyethylene ether and poly (ethylene oxide) (PEO) (200,600, 1000, 2000, 5000) as the main starting materials. Toluene diisocyanate was adopted as the space groups. Their chemical structures were characterized by means of FTIR. The surface activities and surface tensions (γ) were evaluated by maximum bubble pressure method. They were adopted as the grafting monomers of LLDPE, and grafting reaction was carried out by using melt reactive extrusion procedure. Their surface properties and thermal properties of grafted copolymers were characterized by measuring contact angle and DSC. It was found that their crystallization temperature of grafted copolymers were higher than that of the plain LLDPE. It was also found that the hydrophilic property of the grafted copolymers was better than the plain LLDPE.