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Production of PVAc–starch composite materials by co-grinding — Influence of the amylopectin to amylose ratio on the properties

Le Bolay, Nadine and Molina-Boisseau, Sonia Production of PVAc–starch composite materials by co-grinding — Influence of the amylopectin to amylose ratio on the properties. (2014) Powder Technology, 255. 36-43. ISSN 0032-5910

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Official URL: https://doi.org/10.1016/j.powtec.2013.10.050

Abstract

Mixtures of polyvinyl acetate (PVAc) filled with two starch types containing different amylopectin to amylose ratios were co-ground in a laboratory tumbling ball mill. The influence of the starch nature and of the co-grinding treatment on the production mechanism and on the composite properties was studied. The thermal and mechanical properties were characterized, as well as the behavior in water. The presence of starch in the mixture reduces agglomeration phenomena between matrix particles, as well as the mobility of polymeric chains. While a simple mixing of the constituents generates starch concentration points in the matrix, co-grinding favors filler dispersion and PVAc–starch interactions enabling an increase of the mixture properties without adding any chemical agent. The amylopectin to amylose ratio does not affect significantly mechanical properties while a high amylopectin rate promotes water uptake.

Item Type:Article
HAL Id:hal-01894061
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut de Chimie Moléculaire de Grenoble - ICMG (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université Joseph Fourier Grenoble 1 - UJF (FRANCE)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:12 Oct 2018 07:36

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