Processamento do compósito LDPE/Al proveniente da reciclagem de embalagens cartonadas e desenvolvimento de suas modificações com fibras de madeira.
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Data
2006-02-10Autor
Cerqueira, Mario Henrique de
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The urban solid waste problem has been one of the biggest
environmental challenges these days. The solution to this problem lies in
integrated waste management, the objective is to minimize volumes sent to
landfills. Recycling is a big part of this waste management process which
involves the reprocessing of materials to obtain alternative uses for these
materials in every day life.
One of the solid waste materials sent for recycling is the carton package,
which is made of paper, polyethylene and aluminum.
In conjunction with this, the search for new plastics compounds
reinforced with cellulose fibers has been appointed as a market demand,
thanks to the high number of possible applications of these materials, for
instance, in the car manufacturing industry, civil construction, etc.
In this study the modification of the low density polyethylene/aluminum
from carton packages reinforced with cellulose fibers is investigated, and the
addition of the grafted copolymer with maleic anhydride, acting as a
compatibilizer, whose main target is to add value to the material produced,
making them more attractive from a market point of view.
Grafted copolymer was added to the LDPE/Al composite and the
posterior extruded. Cellulose fibers, in different percentages and particle sizes,
were mixed with the resulting material from the first extrusion, and the posterior
extruded in sheets, with different properties and aspects.
After processing, the obtained materials were applied to thermical and
mechanical characterization, infrared spectroscopy and surface eletronic
microscopy to verify the efficiency of the modifications.
This research showed us that by increasing the cellulose fiber
percentages in the generated composites incremented mechanical properties
and thermical stability in comparison to the original composite, and indicated a
subtle action of the compatibilizer in the used experimental conditions.