Photo-oxidative degradation of polypropylene/montmorillonite nanocomposites

The photo-oxidative behavior of the polypropylene (PP)/montmorillonite (MMT) nanocomposites and microcomposites has been investigated upon ultraviolet exposure using the technique of infrared spectroscopy. The rate of photo-oxidative degradation of PP/MMT nanocomposites is much faster than that of pure PP. The influence of pristine MMT, alkylammonium and compatibilizer were investigated, respectively. All these components can catalyze the photo-oxidation of PP matrix, in which the influence of compatibilizer and pristine MMT is primary. Moreover, the dispersion state of the clay particles in the polymer matrices has a little influence on the photo-oxidative degradation of polymer matrix. Consequently, an integrated catalysis mechanism of the photo-oxidative degradation of PP clay nanocomposite is proposed. It would provide benefit direction for the preparation and usage of polymer layered silicate nanocomposites (PLSN).

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

[2]  Mingshu Yang,et al.  The influence of interlayer cations on the photo‐oxidative degradation of polyethylene/montmorillonite composites , 2004 .

[3]  A. Okada,et al.  Preparation and Mechanical Properties of Polypropylene−Clay Hybrids , 1997 .

[4]  Sabu Thomas,et al.  Environmental effects on the degradation behaviour of sisal fibre reinforced polypropylene composites , 2002 .

[5]  Jennifer A. Lee,et al.  Influence of clay exfoliation on the physical properties of montmorillonite/polyethylene composites , 2002 .

[6]  P. Dubois,et al.  Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials , 2000 .

[7]  R. Mülhaupt,et al.  Poly(propylene)/organoclay nanocomposite formation: Influence of compatibilizer functionality and organoclay modification , 2000 .

[8]  A. Morgan,et al.  Effects of organoclay Soxhlet extraction on mechanical properties, flammability properties and organoclay dispersion of polypropylene nanocomposites , 2003 .

[9]  Suprakas Sinha Ray,et al.  POLYMER/LAYERED SILICATE NANOCOMPOSITES: A REVIEW FROM PREPARATION TO PROCESSING , 2003 .

[10]  J. Bicerano,et al.  Polymeric Nanocomposites for Automotive Applications , 2000 .

[11]  Lixin Wu,et al.  Polypropylene/Montmorillonite Nanocomposites. Review of the Synthetic Routes and Materials Properties , 2001 .

[12]  Bin Zhao,et al.  Thermal stability and flammability of polyamide 66/montmorillonite nanocomposites , 2003 .

[13]  Emmanuel P. Giannelis,et al.  Polymer Layered Silicate Nanocomposites , 1996 .

[14]  C. Sinturel,et al.  Influence of the exposure parameters on the mechanism of photooxidation of polypropylene , 1999 .

[15]  Charles A. Wilkie,et al.  Photo-oxidation of polymeric-inorganic nanocomposites: chemical, thermal stability and fire retardancy investigations , 2001 .

[16]  Jeffrey W. Gilman,et al.  Flammability and thermal stability studies of polymer layered-silicate (clay) nanocomposites , 1999 .

[17]  Marco Zanetti,et al.  Thermal behaviour of poly(propylene) layered silicate nanocomposites , 2001 .

[18]  D. R. Paul,et al.  Nanocomposites formed from linear low density polyethylene and organoclays , 2004 .

[19]  Mingshu Yang,et al.  Photo-oxidative degradation of polyethylene/montmorillonite nanocomposite , 2003 .

[20]  M. Zanetti,et al.  Preparation and combustion behaviour of polymer/layered silicate nanocomposites based upon PE and EVA , 2004 .

[21]  A. Lele,et al.  Effect of clay orientation on the tensile modulus of polypropylene–nanoclay composites , 2004 .

[22]  J. Gardette,et al.  Photo-oxidation of Polypropylene/Montmorillonite Nanocomposites. 1. Influence of Nanoclay and Compatibilizing Agent , 2004 .

[23]  H. García,et al.  Generation and reactions of organic radical cations in zeolites. , 2002, Chemical reviews.