Polypropylene/clay nanocomposites prepared by in situ grafting-melt intercalation with a novel cointercalating monomer
作者： Pingan Song , Lifang Tong , Zhengping Fang
DOI: 10.1002/APP.28689
关键词: Thermal stability 、 Polymer chemistry 、 Dynamic mechanical analysis 、 Thermogravimetric analysis 、 Polypropylene 、 Monomer 、 Materials science 、 Chemical engineering 、 Maleic anhydride 、 Pentaerythritol 、 Glass transition
摘要: Polypropylene (PP)/clay nanocomposites were prepared by melt-compounding PP with organomontmorillonite (PMT), using maleic anhydride grafted polypropylene (PP-g-MA) as the primary compatibilizer and N-imidazol-O-(bicyclo pentaerythritol phosphate)-O-(ethyl methacrylate) phosphate (PEBI) cointercalating monomer. X-ray diffraction patterns indicated that larger interlayer spacing of PMT in was obtained due to cointercalation monomer having a large steric volume d-spacing further increased addition PP-g-MA, evidenced transmission electron microscopy. Thermogravimetric analysis revealed PEBI-containing exhibited better thermal stability than PEBI-free composites. Dynamic mechanical demonstrated storage modulus significantly enhanced, glass transition temperature (Tg) shifted slightly low incorporation clay for PP/PMT hybrids. composites gave lower Tg value because strong internal plasticization effect PEBI system. Cone calorimetry showed flame-retardancy properties nano-composites highly improved PEBI.
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