Abstract
The preparation of dispersed nanoclay in nanocomposite sheets is reported based on preparation of UHMWPE gel sheet with nanoclay of MMT by using paraffin oil as a solvent, and removing this oil using PIF and extraction processes. The microstructure of gel sheet studied by X-Ray diffraction XRD, transmission electron microscopy (TEM); Scanning electron microscope (SEM); and differential scanning calorimetry (DSC). The obtained results show good dispersion, partially exfoliation and fully intercalation of MMT nano-particle. The MMT nanoparticles take place between the layers of microstructure gel sheet, i.e. MMT onto the layer surface by means of these processes in the misconstrue gel sheet shows that the layers spacing was increased significantly. For intercalated nanocomposites; different layers spacing corresponds to different chain flexibility and the presence of multi-peaks is caused by the processing of these materials. The images obtained by SEM present a gel-like layers structure of UHMWPE/MMT gel sheet as a result of the deformation and re-arrangement of the gel sheets during PIF process.
Highlights
Since the last two decades, there has been revolutionary progress in the field of nanocomposite and microscale materials
The most serious factor that governs the final development in the morphology properties of polymer/MMT clay nanocomposites is the level of dispersion, exfoliation and intercalation of the nanoclay in the nanocomposite structure
The differential scanning calorimetry DSC measurements were carried out using a Perkin-Elmer Diamond DSC Differential Scanning Calorimeter controlled by a Thermal Analyst 2000 system
Summary
Since the last two decades, there has been revolutionary progress in the field of nanocomposite and microscale materials. Clay-Polymer nanocomposites as one of these materials has recently attracted researchers and professionals, attention as they enhance mechanical and thermal properties when compared to conventional materials. The progress of polyolefin-clay nanocomposites is an interesting field of materials that is growing rapidly These materials have a basic role of enhancing mechanical and physical properties in comparison with the pure polymer Alexandre et al (2000). Quang et al (2007) improved a new technique for exfoliating and dispersing nanoclay particles into polypropylene matrices using supercritical carbon dioxide This method relies on rapid expansion of the clay followed by direct injection into the extruder where the mixture is dispersed into the polymer melt. The most serious factor that governs the final development in the morphology properties of polymer/MMT clay nanocomposites is the level of dispersion, exfoliation and intercalation of the nanoclay in the nanocomposite structure. The structure and orientation produced by plastic deformation in such large specimens could be investigated
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