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Article

Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

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Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
2
Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznań, Poland
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Institute of Materials Engineering, Poznan University of Technology, Jana Pawła II 24, 60-965 Poznań, Poland
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College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1004; https://doi.org/10.3390/polym12051004
Received: 16 March 2020 / Revised: 21 April 2020 / Accepted: 24 April 2020 / Published: 26 April 2020
Application of lignocellulosic fillers in the manufacturing of wood polymer composites (WPCs) is a very popular trend of research, however it is still rarely observed in the case of rotational molding. The present study aimed to analyze the impact of wheat bran content (from 2.5 wt.% to 20 wt.%) on the performance of rotationally-molded composites based on a linear low-density polyethylene (LLDPE) matrix. Microscopic structure (scanning electron microscopy), as well as physico-mechanical (density, porosity, tensile performance, hardness, rebound resilience, dynamic mechanical analysis), rheological (oscillatory rheometry) and thermo-mechanical (Vicat softening temperature) properties of composites were investigated. Incorporation of 2.5 wt.% and 5 wt.% of wheat bran did not cause significant deterioration of the mechanical performance of the material, despite the presence of ‘pin-holes’ at the surface. Values of tensile strength and rebound resilience were maintained at a very similar level, while hardness was slightly decreased, which was associated with the porosity of the structure. Higher loadings resulted in the deterioration of mechanical performance, which was also expressed by the noticeable rise of the adhesion factor. For lower loadings of filler did not affect the rheological properties. However, composites with 10wt.% and 20 wt.% also showed behavior suitable for rotational molding. The presented results indicate that the manufacturing of thin-walled products based on wood polymer composites via rotational molding should be considered a very interesting direction of research. View Full-Text
Keywords: rotational molding; polyethylene; wheat bran; waste management; wood polymer composites; recycling rotational molding; polyethylene; wheat bran; waste management; wood polymer composites; recycling
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MDPI and ACS Style

Hejna, A.; Barczewski, M.; Andrzejewski, J.; Kosmela, P.; Piasecki, A.; Szostak, M.; Kuang, T. Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran. Polymers 2020, 12, 1004. https://doi.org/10.3390/polym12051004

AMA Style

Hejna A, Barczewski M, Andrzejewski J, Kosmela P, Piasecki A, Szostak M, Kuang T. Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran. Polymers. 2020; 12(5):1004. https://doi.org/10.3390/polym12051004

Chicago/Turabian Style

Hejna, Aleksander, Mateusz Barczewski, Jacek Andrzejewski, Paulina Kosmela, Adam Piasecki, Marek Szostak, and Tairong Kuang. 2020. "Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran" Polymers 12, no. 5: 1004. https://doi.org/10.3390/polym12051004

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