Abstract
Our work aims to evaluate a complete outlook of virgin high density polyethylene (HDPE) and polypropylene (PP) polyblends. Virgin PP of 20, 30 and 50 weight% is compounded with virgin HDPE. The properties like tensile strength, flexural strength, Izod impact strength are examined. Scanning electron microscopy (SEM) and polarised light microscopy (PLM) are used to observe the surface and crystal morphology. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) tests verify the non compatibility of both polymers. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques are used to study the thermal behaviour of composites. The results manifest co-occurring spherulites for polyblends; indicating the composite to be a physical blend of continuous and dispersed phases, but on the other hand PP improves the tensile and flexural properties of HDPE.
Highlights
Polymer composite is material of research in modern days
The mechanical properties of the PP/high density polyethylene (HDPE) polyblend decreases with increase in dissimilarity of melt flow index (MFI) [21], so we have investigated a complete prospects of PP reinforced HDPE polyblends with similar MFI manufactured by the help of twin screw extruder and injection moulding machines
MPa) of tensile strength is resulted from PP where as the HDPE matrix bears a tensile strength of ≈22 MPa
Summary
Polymer composite is material of research in modern days. Thermoplastic polymers are of great interest due to their technical and commercial importance [1]. In addition it has high chemical resistance, low cost and easy to manufacture. Past studies show the compatibility of PP/HDPE polyblends depends on factors like processing temperature, polymer structure and blending ratios [15] [16] [17]. Polymers with similar physical properties form polyblends with greater mechanical strength [18] [19] [20]. Crystal morphologies are captured using PLM, SEM and X-RD techniques Compatibility of both the thermoplastics are re-examined by study of molecular structure using FTIR
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