Modern Biodegradable Plastics—Processing and Properties Part II

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2021
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Abstract
Four different plastics were tested: potato starch based plastic (TPS-P)–BIOPLAST GF 106/02; corn starch based plastic (TPS-C)–BioComp BF 01HP; polylactic acid (polylactide) plastic (PLA)—BioComp BF 7210 and low density polyethylene, trade name Malen E FABS 23-D022; as a petrochemical reference sample. Using the blown film extrusion method and various screw rotational speeds, films were obtained and tested, as a result of which the following were determined: breaking stress, strain at break, static and dynamic friction coefficient of film in longitudinal and transverse direction, puncture resistance and strain at break, color, brightness and gloss of film, surface roughness, barrier properties and microstructure. The biodegradable plastics tested are characterized by comparable or even better mechanical strength than petrochemical polyethylene for the range of film blowing processing parameters used here. The effect of the screw rotational speed on the mechanical characteristics of the films obtained was also demonstrated. With the increase in the screw rotational speed, the decrease of barrier properties was also observed. No correlation between roughness and permeability of gases and water vapor was shown. It was indicated that biodegradable plastics might be competitive for conventional petrochemical materials used in film blowing niche applications where cost, recyclability, optical and water vapor barrier properties are not critical.
Reference Key
sikora2021materialsmodern Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Janusz W. Sikora;Łukasz Majewski;Andrzej Puszka;Sikora, Janusz W.;Majewski, Łukasz;Puszka, Andrzej;
Journal Materials (Basel, Switzerland)
Year 2021
DOI
10.3390/ma14102523
URL
https://www.mdpi.com/1996-1944/14/10/2523/htm
Keywords
mechanical properties polyethylene optical properties starch polylactide barrier properties processing of plastics blown film

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