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Biochar to the rescue: Balancing the fire performance and mechanical properties of polypropylene composites
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymeric Materials. Department of Civil and Environmental Engineering, Centre for Advanced Composite Materials, University of Auckland, New Zealand.
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2017 (English)In: Polymer degradation and stability, ISSN 0141-3910, E-ISSN 1873-2321, Vol. 144, 485-496 p.Article in journal (Refereed) Published
Abstract [en]

Biochar based wood/polypropylene (PP) composites were manufactured with two flame retardants (FRs): ammonium polyphosphate/APP and magnesium hydroxide/Mg(OH)(2). The amounts of wood and biochar were alternated for accommodating the FRs in each blend. Flammability and mechanical characterisation for both the batches containing different FRs were done. Having higher proportion of biochar and less wood is beneficial to reduce flammability. The thermally stable biochar contributes to formation of effective char to restrict O-2 transfer into PP. The higher weight ratio of biochar than wood in the composites compromised the tensile and flexural strengths to some extent as the APP and Mg(OH)(2) particles were trapped inside biochar pores consequently reducing the effectiveness of biochar pore infiltration by PP. In general, addition of biochar with a woody biomass (with FRs) to neat PP significantly impedes its flammability while enhancing certain mechanical properties, such as flexural strength and tensile/flexural moduli and preserving the tensile strength. (C) 2017 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2017. Vol. 144, 485-496 p.
Keyword [en]
Composite, Biochar, Polypropylene, Flame retardants, Mechanical
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-217757DOI: 10.1016/j.polymdegradstab.2017.09.006ISI: 000414111700049Scopus ID: 2-s2.0-85029597132OAI: oai:DiVA.org:kth-217757DiVA: diva2:1158920
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QC 20171121

Available from: 2017-11-21 Created: 2017-11-21 Last updated: 2017-11-21Bibliographically approved

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