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Hanim. H, Zarina, R.,Ahmad Fuad,M.Y.,Ishak.Z.A.M.,and Hassan, A . The Effect of Calcium carbonate Nano-filler on the mechanical properties and crystallization behavior of Polypropylene, Malaysian Polymer Journal (MPJ), 2008, Vol 3, No. 12, pp. 38-49.

has been cited by the following article:

• TITLE: The Influence of Creep on the Mechanical Properties of Calcium Carbonate Nanofiller Reinforced Polypropylene

  AUTHORS: Chrisopher Chukwutoo Ihueze, Chinedum Ogonna Mgbemena, Ugwu Sylveste

  KEYWORDS: Influence of creep, Mechanical properties, Calcium carbonate nanofiller, ReinforcedPolypropylene.

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.10 No.2, February 20, 2011

  ABSTRACT: The study focused on experimental and classical data to establish some mechanical properties for optimum design of new polypropylene components to serve under creep environment. The creep studies recorded stress limits that never exceeded 24.19MPa and maximum creep modulus that never exceeded 1.49GPa as against the predictions of classical equations that gave 2.0GPa for PPC0 and 2.46GPa for PPC2 at ambient conditions. The shear modulus and shear strength of the PPC0 and the PPC2 are predicted as 0.75GPa and 120MPa respectively and 0.92GPa and 150MPa respectively while the yield strengths found to be about 13.19MPa and 13.20MPa respectively for PPC0 and PPC2 at elastic strains 0.008 and 0.009 respectively. Further found are that as the material deforms the stiffness or modulus decrease, at low strains there is an elastic region, as temperature and applied stress increase the material becomes more flexible characterized with reduction in moduli. Plastic deformation at strains above 0.01 resulted to strain- hardening or strain-strengthening that manifested as the increasing area ratios and associated creep cold work. Also established by this study is a computational model for evaluating the elastic modulus of polypropylene matrix based material as expressed in equation (6). Both the Halphin-Tsai and the Birintrup equations for elastic modulus of unidirectional fibre composites were confirmed to be appropriate for prediction of elastic modulus of nanofiller composites with polymer matrix.