The influence of layered compounds on the properties of starch/layered compound composites

Glycerol‐plasticized starch films were modified by addition of various layered compounds as fillers, two being of natural origin (kaolinite, a neutral mineral clay, and hectorite, a cationic exchanger mineral clay) and two synthetic (layered double hydroxide, LDH, an anionic exchanger, and brucite,...

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Published in:Polymer international 2003-06, Vol.52 (6), p.1035-1044
Main Authors: Wilhelm, Helena-M, Sierakowski, Maria-R, Souza, Gabriel P, Wypych, Fernando
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
layered compound
Natural polymers
Physicochemistry of polymers
Polymer industry, paints, wood
starch
Starch and polysaccharides
Technology of polymers
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description Glycerol‐plasticized starch films were modified by addition of various layered compounds as fillers, two being of natural origin (kaolinite, a neutral mineral clay, and hectorite, a cationic exchanger mineral clay) and two synthetic (layered double hydroxide, LDH, an anionic exchanger, and brucite, having a neutral structure). The effects of the filler type and the plasticizer were analyzed by X‐ray diffraction, dynamic mechanical analysis and thermogravimetry. The storage modulus was higher for kaolinite > brucite > hectorite than for LDH starch composites. However, only the hectorite filler presented a shift of the interplanar basal distance to higher values, which represents the intercalation of glycerol molecules between the clay layers. The glycerol intercalation is minimized in plasticized–oxidized starch films where the oxidized starch chains are preferentially intercalated. Copyright © 2003 Society of Chemical Industry
doi_str_mv 10.1002/pi.1198
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source Wiley-Blackwell Read & Publish Collection
subjects Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
layered compound
Natural polymers
Physicochemistry of polymers
Polymer industry, paints, wood
starch
Starch and polysaccharides
Technology of polymers
title The influence of layered compounds on the properties of starch/layered compound composites
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