Minimizing the creep of recycled polypropylene/rubberwood flour composites with mixture design experiments

Composites of rubberwood flour (RWF) and recycled polypropylene (rPP) were produced into panel samples by using a twin-screw extruder. The effects on creep behavior of mixture fractions of rPP, RWF, maleic anhydride-grafted polypropylene (MAPP), and ultraviolet (UV) stabilizer were studied in a D-op...

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Bibliographic Details
Published in:Journal of composite materials 2015-01, Vol.49 (1), p.17-26
Main Authors: Homkhiew, Chatree, Ratanawilai, Thanate, Thongruang, Wiriya
Format: Article
Language:English
Subjects:
Creep (materials)
Flour
Mathematical models
Optimization
Polymer matrix composites
Polypropylenes
Recycled
Rubberwood
UV stabilizers
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Summary:Composites of rubberwood flour (RWF) and recycled polypropylene (rPP) were produced into panel samples by using a twin-screw extruder. The effects on creep behavior of mixture fractions of rPP, RWF, maleic anhydride-grafted polypropylene (MAPP), and ultraviolet (UV) stabilizer were studied in a D-optimal mixture design. Creep was significantly affected by the composition. Increasing the fraction of RWF decreased creep, while MAPP and UV stabilizer increased it. The models fitted were used to optimize a desirability score that balanced multiple creep characteristics. The model-based optimal formulation 50.5 wt% rPP, 44.9 wt% RWF, 3.5 wt% MAPP, 0.1 wt% UV stabilizer, and 1.0 wt% lubricant was experimentally validated to have low creep closely matching the model predictions.
ISSN:0021-9983
1530-793X
DOI:10.1177/0021998313514257