polymery 2010 - Institute of Macromolecular Chemistry - Akademie ...

L-05
PREPARATION OF NEW CINNAMOYL ESTERS OF VARIOUS
POLYSACCHARIDES AND THEIR ANTIOXIDATIVE PROPERTIES
L. Rychlá a , A. Ebringerová b , I. Sroková c , K. Csomorová a , J. Rychlý a
a Polymer Institute of Slovak Academy of Sciences, Dúbravská cesta 9, 84 236 Bratislava,
Slovakia (upolrych@savba.sk, http://www.polymer.sav.sk)
b Institute of Chemistry, Center of Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9,
845 38 Bratislava, Slovakia
c Faculty of Industrial Technologies, Trenčín University of A.Dubček, 02 001 Púchov,
Slovakia
One of the possible routes how to reduce worldwide increasing plastic wastes from crude oilbased
materials is their replacement – at least partially - by biopolymers obtained from renewable
resources. All components (additives, inhibitors, etc.) of fully biodegradable materials have to be
bio-compatible, as well.
Natural antioxidants extracted from different plants, herbs and spices represent an alternative to
synthetic antioxidants. They are considered for stabilization of synthetic polymers as they are
biologically degradable in nature. This is also the reason why they may be of interest in food
industry and in medical packaging 1 . One of the first natural antioxidants used was α-tocopherol in
LDPE 2 .
In our earlier paper 3 we tested by-products containing polyphenols and tannins derived from grape
processing in wine production as well as carotenoid-containing waste from tomatoes which were
believed to have antioxidative potential in polypropylene 3 . DSC and Chemiluminescence analysis
(CL) confirmed the antioxidant activity of these aditives, and provided the following order of
antioxidant efficiency: red grape seeds > white seeds > tomato extract. Hydroxytyrosol and αtocopherol
(both as extracts from vegetable oils) 4 were considered as alternative natural inhibitors
for polypropylene (PP) as well. Evaluation of their antioxidative performance and a comparison
with the effect of phenolic inhibitor Irganox 1076 performed by CL represents Fig.1.
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