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Title: Effects of environmental ageing on HMS-polypropylene/Cloisite nanocomposites

High melt strength polypropylene Nanocomposites (NC-HMSPP) were obtained with concentrations of 0.1 and 5 wt% of Cloisite 20A. The melt intercalation, using twin screw extruder was done to homogenize the nanocomposite in presence of polypropylene graft maleic anhydride (PP-g-MA) compatibilizer agent. In this work, the manufactured dumbbell samples were settled in device for natural ageing assay. The period of exposition was January to December of 2012. The effects of environmental ageing was determined by carbonyl index (FT-IR) and the results showed that nanocomposites were more stable than HMSPP. The mechanical properties (elongation and rupture strength) were evaluated and the thermal behavior was investigated by differential scanning calorimetry (DSC) and X ray diffraction (DRX). The morphology was observed by scanning electron microscopy (SEM) in which the nanocomposites showed intense cracks on the surface.
Authors:
; ; ; ;  [1]
  1. Nuclear and Energy Research Institute, IPEN-CNEN/SP (Brazil)
Publication Date:
OSTI Identifier:
22270973
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1593; Journal Issue: 1; Conference: PPS-29: 29. international conference of the Polymer Processing Society, Nuremberg (Germany), 15-19 Jul 2013; Other Information: (c) 2014 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; AGING; ANHYDRIDES; CALORIMETRY; CARBONYLS; COMPOSITE MATERIALS; CONCENTRATION RATIO; FOURIER TRANSFORMATION; FRACTURE PROPERTIES; GRAFTS; INFRARED SPECTRA; NANOSTRUCTURES; POLYPROPYLENE; RUPTURES; SCANNING ELECTRON MICROSCOPY; X-RAY DIFFRACTION