Effect of wood flour addition and modification of its surface on the properties of rotationally molded polypropylene composites

M. Barczewski; M. Szostak; D. Nowak; A. Piasecki

doi:10.14314/polimery.2018.11.5

Published : 2021-01-13

Vol. 63 No. 11-12 (2018)

Effect of wood flour addition and modification of its surface on the properties of rotationally molded polypropylene composites

M. Barczewski M. Szostak D. Nowak A. Piasecki

DOI: https://doi.org/10.14314/polimery.2018.11.5

Abstract

The aim of this study was to assess the effect of wood flour addition and the treatment of its surface on the properties and structure of rotationally molded (rotomolded) polypropylene. In this study, a random polypropylene copolymer (rPP) micropellet was rotationally molded with the direct addition of 5 wt % of commercial grade of wood flour Lignocel C120, untreated (WF) and chemically treated (mWF). Part of the natural filler was chemically modified by a silanization process using 3-aminopropyltriethoxysilane (3-APS). The structure, quality and mechanical properties of the polypropylene and composite rotomolded parts were discussed in terms of changes in the material’s thermal properties, evaluated by differential scanning calorimetry (DSC), thermomechanical properties, obtained by dynamic mechanical-thermal analysis (DMTA), and dynamic rheological properties, assessed by oscillatory rheometry. The structure of composites and fillers was analyzed by means of a scanning electron microscopy (SEM), while the analysis of the chemical structure of materials and final products was carried out by a Fourier transform infrared spectrometry (FT-IR). It was found that adding the natural filler, despite the application of a preliminary drying and chemical treatment caused creation of the pores and decreased the overall mechanical properties of the composites. The lower processing ability of the composites was ascribed to a higher complex viscosity and an increase in the elastic behavior of molten composite materials in comparison to pure rPP.

Keywords

rotational molding ; polypropylene ; natural filler ; natural composites ; WPC odlewanie rotacyjne ; polipropylen ; napełniacz naturalny ; kompozyty naturalne ; WPC

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Barczewski, M., Szostak, M., Nowak, D., & Piasecki, A. (2021). Effect of wood flour addition and modification of its surface on the properties of rotationally molded polypropylene composites. Polimery, 63(11-12), 772–784. https://doi.org/10.14314/polimery.2018.11.5

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M. Barczewski mateusz.barczewski@put.poznan.pl

Affiliation
Poznan University of Technology, Faculty of Mechanical Engineering and Management, Institute of Materials Technology, Piotrowo 3, 61-138 Poznan, Poland

M. Szostak

Affiliation
Poznan University of Technology, Faculty of Mechanical Engineering and Management, Institute of Materials Technology, Piotrowo 3, 61-138 Poznan, Poland

D. Nowak

Affiliation
Poznan University of Technology, Faculty of Mechanical Engineering and Management, Institute of Materials Technology, Piotrowo 3, 61-138 Poznan, Poland

A. Piasecki

Affiliation
Poznan University of Technology, Faculty of Mechanical Engineering and Management, Institute of Materials Science and Engineering, Jana Pawła II 24, 61-138 Poznan, Poland