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Citation: XIN Zhi-Rong, QIU Zhao-Ming, HOU Wan-Guo, YIN Li-Gang, LIU Xiao-Li, LIU Chan, YIN Jing-Hua. Preparation and Characterization of Grafted Copolymers of Low Linear Density Polyethylene and Poly(ethylene oxide) Sterates[J]. Chinese Journal of Applied Chemistry, ;2009, 26(4): 378-382. shu

Preparation and Characterization of Grafted Copolymers of Low Linear Density Polyethylene and Poly(ethylene oxide) Sterates

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a Key Lab for Colloid ang Interface Chemistry, School of Chemistry and Chemical Engeering, Shandong University, Ji'nan;
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b School of Chemical and Biology Science and Engeering, Yantai University, Yantai;
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c State Key Laboratory of Polymer Physics and Chem istry, Changchun Institute of Applied Chem istry Chinese Academy of Sciences, Changchun 130022

Corresponding author: YIN Jing-Hua,
Received Date: 16 March 2008
Available Online: 5 June 2008
Fund Project: 山东省自然基金(Y2006B32) (Y2006B32)中国博士后基金(20070411091) (20070411091)山东省博士后创新项目专项基金(200703058)资助项目 (200703058)

A series of surfactants,a,b,c,d,e and their acrylates,A,B,C,D and E,were synthesized with poly(ethylene oxide)(PEO)(Mw:200,600,1 000,2 000,6 000) and sterate chloride 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 surfactants a,b,c,d and e were evaluated by maximum bubble pressure method.Surfactants A,B,C,D and E were adopted as the grafting monomers of linear low density poly-ethylene(LLDPE),and grafting reaction was carried out via melt reactive extrusion procedure.Their surface properties were characterized with measuring contact angle.The surface tensions of sterates containing PEO with different molecular mass are individually 30.19,32.22,35.30,38.39 and 43.37 mN/m.The contact angles are individually 81.06°,70.10°,72.25°,76.40° and 95.55°.Thermal properties of grafted copo-lymers were studied by DSC.The crystalline temperatures of grafted copolymers are individually 109.30 ℃,109.08 ℃,110.18 ℃,109.74 ℃ and 109.74 ℃.The surface tension was found to increase with the length of PEO and the hydrophilic property of the grafted copolymers was better than that of pure LLDPE(103°).The crystalline temperatures of grafted copolymers were higher than that of pure LLDPE(104.95 ℃).
- acrylate,
- DSC,
- surface active tension,
- graft copolymers of LLDPE,
- reactive extrusion
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