Three nonionic surfactants, S1, S2 and S3 and their acrylates, AS1, AS2 and AS3, were synthesized by using poly(ethylene oxide) and diols such as glycol, 1,6-hexanediol and 1,10-decanediol as the main starting materials. Their chemical structures were characterized by means of FTIR and 1H NMR. The surface activity and surface tension (γ) of S1, S2 and S3 were evaluated by drop weight method. The surface tension was found to decrease with the length of lipophilic spacer in the molecular chains (γS1<γS2<γS3). AS1, AS2 and AS3 were adopted as functionalizing monomers and grafted onto
Three nonionic surfactants, S1, S2 and S3 and their acrylates, AS1, AS2 and AS3, were synthesized by using poly(ethylene oxide) and diols such as glycol, 1,6-hexanediol and 1,10-decanediol as the main starting materials. Their chemical structures were characterized by means of FTIR and 1H NMR. The surface activity and surface tension (γ) of S1, S2 and S3 were evaluated by drop weight method. The surface tension was found to decrease with the length of lipophilic spacer in the molecular chains (γS1<γS2<γS3). AS1, AS2 and AS3 were adopted as functionalizing monomers and grafted onto LLDPE by using melt reactive extrusion procedure. The graft degrees of LLDPE were determined by FTIR. Three grafted LLDPE samples with grafting degrees of 1.16% (AS1), 0.82% (AS2) and 0.71% (AS3) were prepared. Thermal properties and rheological properties of grafted LLDPE samples were studied by using DSC and a rotational rheometer. Crystallization rates of grafted LLDPE were faster than that of the plain LLDPE at a given crystallization temperature since graft chains could act as nucleating agents. Isothermal crystallization behavior of grafted LLDPE was in accordance with the Avrami model only in the first stage and deviated from the model with increasing the crystallization time. Shear thinning at high shear rate and shear thickening at low shear rate were observed for the grafted LLDPE.