Synthesis and Thermal Behavior of Silica-graft-Polypropylene Nanocomposite，2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）-中国聚合物网,论文下载

Synthesis and Thermal Behavior of Silica-graft-Polypropylene Nanocomposite

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Silica-graft-Polypropylene Nanocomposite

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分子表征

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2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）

简介：

ThesilicagraftPoly(propylene)(PP)nanocompositesaresuccessfullysynthesizedandtheirthermalpropertiesarestudied.Thesilica-graft-PPnanocompositesarepreparedbyradicalgraftingcopolymerizationofmodifiedsilica,styrene,andmaleicanhydride(MAH)inPP/xylenesolution.TheDifferentialScanningCalorimetry(DSC)resultsshowthatthemeltingpeakandthecrystallinetemperatureshifttohigherwiththeincreaseofsilicacontentduetotheremarkableheterogeneousnucleationeffectofnanoparticlesinPPmatrix.ThethermaldegradationbehaviorofsilicagraftPPnanocompositeswasinvestigatedbyusingnon-isothermalthermogravimetricanalysis(TGA).Theresultsindicatethatthethermalstabilitywassignificantlyimprovedwiththeincreasingofgraftedsilica.Theactivationenergy(Ea)ofsilica/PPnanocomposites,whichisevaluatedbyusingtheFreeman-Carrollmethod,islargethanthatofneatPPandincreaseswiththesilicacontent.Thereasonforthisenhancementmayattributetothephysical-chemicaladsorptionofthevolatiledegradationproductsonthenanoparticleswhichdelaysthevolatilisationoftheproductsgeneratedduringdecomposition,andthestronginteractionbetweennanoparticlesandpolypropylenechains,whichwilllargelyweakenthebreakageofpolypropylenebackbonechains.

作者：

Kang Zheng XiaYin Yao XingYou Tian Lin Chen Yong Li

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2007-08-07 17:20:04

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