Preparation And Properties Of PP/Sepiolite Intercalation Nanocomposites

Compared with virgin Polymer or conventional micro-and macro-composites，polymer-layered sili cate nanocomposites (PLSN) material shave high moduli， superiormechanical and thermal properties，decreased gas Permeability and flammability，increased biodegradability of biodegradable polymer sand heat distortion temperatures. So ithas continuously attracted intensive and extensive interests.In this paper, at early stage study, the organic sepiolite was prepared by the exchanginginorganic cations with CTAB, then PP/sepiolite and PP/modified sepiolite nanocomposites wasprepared by melt intercalation method. At advanced stage,the PS/organic-sepiolite wasprepared through in situ emulsion polymerization by use m-sepiolite and Styrene(St),then thePP/PS-sepiolite nanocomposites was obtained via melt-intercalation method usingPS/organic-sepiolite and PP as material.The structures and properties of PP/sepiolite, PP/modified sepiolite and PP/PS-sepiolitenanocomposites was characterized by XRD,DSC,SEM and mechnical properties testing etc.The analyse of modified sepiolite and PS/organic-sepiolite showed that the hydrophilicsepiolite has been changed to make the sepiolite surface organophilic;The XRD patternsindicated that the intercalation nanocomposites have been prepared;The DSC results showedthat the addition of sepiolite resulted in heterogeneous nueleation crystallization of PP,andimproved the crystallinity of PP. The mechenical testing results indicated that the sepiolitecould greatly improve the impact strength,tensile strength compare to nomal PP. The SEMimages showed that the sepiolite layers were exfoliated into nanometer size and disperseduniformly in the PP matrix.