Influence of thermal and UV treatment on the polypropylene/graphite composite

Abstract

Electrically conductive polypropylene/graphite (PP/graphite) composites were prepared via blending granulated PP with maleic anhydride grafted PP and natural graphite. Electrical conductivity of prepared samples containing either 65, 70, or 75 wt.% of graphite was measured and the most conductive sample containing 75 wt.% of graphite was exposed to UV irradiation for 1 and 24 hours or thermally treated at 170 °C for 1 hour. The influence of thermal and UV exposure on the structural and electrical changes in such treated samples was studied. Local current measurements on the surface were made using scanning spreading resistance microscopy and morphology of the surface was studied by atomic force microscopy. X-ray diffraction analysis, infrared and Raman spectroscopy were also used for the structural characterization. Properties of treated and untreated samples are compared and differences are discussed.

Mechanical, thermal, and rheological properties of polypropylene hybrid composites based clay and graphite

“…For all the composites, the complex modulus increases with filler content. 35 This is mainly due to the higher stiffness of the fillers compared to the matrix, as for tensile properties (Figures 5 and 6). On the basis of filler loading, hybrid composite (Figure 8(c) and (d)) shows a slight variation in the complex modulus with filler addition, but lower values are obtained for graphite because of its lower rigidity (Figure 7).…”

Fabrication of Thermally Stable Graphite-Based Poly(acrylonitrile-co-acrylic acid) Composite with Impressive Antimicrobial Properties

“…Besides, most of the pure polymers have weak biological features including biocompatibility, degradability and antimicrobial activities which hinder 5,[12][13][14][15] their broad-spectrum applications in biomedical and other fields. The intrinsic properties of polymeric materials can be improved by [16][17][18][19] synthesizing their composites. The polymers-based composites are the synthetic materials which are made of polymeric matrix and filler.…”

“…The fillers or additives improve the existing properties of polymer composites and enable them to be used for different applications. The polymer-based composites have been prepared with a verity of organic and inorganic additive materials including nanoparticles, nanofibers, and 16,20 polymers, etc. by using different techniques such as in situ addition, 10,13,14,21 ex situ impregnation, polymer blending, and sol-gel casting, etc.…”

Nano indentation and morphology study of the polypropylene and high density polyethylene nanocomposites based on exfoliated graphite Nano platelets/Nano- magnesium oxide

“…One of the most utilized types of thermoplastic resins in industrial applications is the Polypropylene (PP), which is used in automotive industry, packaging, non-structural applications, and many others [7]. The urge to benefit from the extraordinary features of PP lead to the focus on its enhancement, by seeking suitable techniques of reinforcement, which is revealed in novel presented matrices like carbon nanotubes [8], carbon black [9], and graphite [10]. On the other hand, high density polyethylene (HDPE) is another commonly used thermoplastic in industry, thanks to its superior physical and mechanical properties.…”