Effect of surface treatment on the properties of polypropylene/nanoboehmite composites

Boehmite nanoparticles are surface modified with alkyl phosphorous acid to improve their dispersion in polypropylene. Effective grafting is evidenced by NMR, elemental analysis and by the fact that the dispersion ability (or disagglomeration) of grafted boehmite particle in nonpolar solvent is significantly altered. High dispersibility level in PP is obtained with long alkyl chain surface modifiers. The improvement of the nanocomposites thermal stability is correlated with the nanoparticles dispersion level. However, composite with well dispersed nanoparticle did not demonstrate enhanced mechanical properties because of weak polymer/filler interactions with the PP matrix. Better reinforcement is noticed for polypropylene composite loaded with untreated boehmite or treated with shorter alkyl chain. For these composites, the nanoparticles acted as nucleating agents. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

[1]  A. Hrymak,et al.  Preparation of interfacially compatibilized PP‐EPDM thermoplastic vulcanizate/graphite nanocomposites: Effects of graphite microstructure upon morphology, electrical conductivity, and melt rheology , 2008 .

[2]  Emiliano Bilotti,et al.  Polymer nanocomposites based on needle‐like sepiolite clays: Effect of functionalized polymers on the dispersion of nanofiller, crystallinity, and mechanical properties , 2008 .

[3]  J. Cavaillé,et al.  Nanocomposites of isotactic polypropylene reinforced with rod-like cellulose whiskers , 2006 .

[4]  Charles A. Wilkie,et al.  The thermal degradation of poly(methyl methacrylate) nanocomposites with montmorillonite, layered double hydroxides and carbon nanotubes , 2006 .

[5]  A. Barron,et al.  Chemically functionalized alumina nanoparticle effect on carbon fiber/epoxy composites , 2005 .

[6]  P. Mutin,et al.  Hybrid materials from organophosphorus coupling molecules , 2005 .

[7]  T. Kashiwagi,et al.  Flammability properties of polymer nanocomposites with single-walled carbon nanotubes: effects of nanotube dispersion and concentration * , 2005 .

[8]  S. Hoa,et al.  THE ROLE OF COUPLING AGENTS IN THE FORMATION OF POLYPROPYLENE NANOCOMPOSITES , 2005 .

[9]  F. Gao.  Clay/polymer composites: the story , 2004 .

[10]  C. Ma,et al.  Synthesis, characterization, thermal properties and flame retardance of novel phenolic resin/silica nanocomposites , 2004 .

[11]  V. Altstaedt,et al.  Rheological, mechanical and tribological properties of carbon-nanofibre reinforced poly (ether ether ketone) composites , 2003 .

[12]  P. Mutin,et al.  Organically modified aluminas by grafting and sol–gel processes involving phosphonate derivatives , 2001 .

[13]  C. A. Wilkie,et al.  Studies on the Mechanism by Which the Formation of Nanocomposites Enhances Thermal Stability , 2001 .

[14]  P. Mutin,et al.  Anchoring of Phosphonate and Phosphinate Coupling Molecules on Titania Particles , 2001 .

[15]  Walter Caseri,et al.  Nanocomposites of polymers and metals or semiconductors: Historical background and optical properties , 2000 .

[16]  T. Kurauchi,et al.  Synthesis and properties of polyimide–clay hybrid , 1993 .

[17]  Toshio Kurauchi,et al.  One‐pot synthesis of nylon 6–clay hybrid , 1993 .

[18]  Toshio Kurauchi,et al.  Mechanical properties of nylon 6-clay hybrid , 1993 .

[19]  A. Granzow,et al.  Phosphine-based flame retardants for polypropylene† , 1979 .

[20]  E. Teller,et al.  ADSORPTION OF GASES IN MULTIMOLECULAR LAYERS , 1938 .

[21]  G. Camino,et al.  Effect of hydroxides and hydroxycarbonate structure on fire retardant effectiveness and mechanical properties in ethylene-vinyl acetate copolymer , 2001 .