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Dynamic Mechanical Properties of Grafted Polypropylene Composites Reinforced with Acetylated Wheat Straw Fibers

Published online by Cambridge University Press:  16 March 2015

Ramón Sánchez ,
Jacobo Aguilar ,
Silvia Y. Martínez ,
Reyes J. Sanjuan ,
Gerardo A. Mejía ,
Emma R. Macías ,
J Félix A. Soltero  and
Víctor V. A. Fernández
Ramón Sánchez
Affiliation:
Departamento de Ciencias Tecnológicas, Universidad de Guadalajara, Ocotlán, Jalisco, 47820, México.
Jacobo Aguilar
Affiliation:
Departamento de Ciencias Tecnológicas, Universidad de Guadalajara, Ocotlán, Jalisco, 47820, México.
Silvia Y. Martínez
Affiliation:
Departamento de Ciencias Médicas y de la Vida, Universidad de Guadalajara, Ocotlán, Jalisco, 47820, México.
Reyes J. Sanjuan
Affiliation:
Departamento de Fundamentos del Conocimiento, Universidad de Guadalajara, Colotlán, Jalisco, 46200, México
Gerardo A. Mejía
Affiliation:
Departamento de Bienestar y Desarrollo Sustentable, Universidad de Guadalajara, Colotlán, Jalisco, 46200, México
Emma R. Macías
Affiliation:
Departamento de Ingeniería Química, Universidad de Guadalajara, Guadalajara, Jalisco, 44430, México
J Félix A. Soltero
Affiliation:
Departamento de Ingeniería Química, Universidad de Guadalajara, Guadalajara, Jalisco, 44430, México
Víctor V. A. Fernández
Affiliation:
Departamento de Ciencias Tecnológicas, Universidad de Guadalajara, Ocotlán, Jalisco, 47820, México.
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Abstract

Dynamic mechanical properties of polypropylene (PP) and grafted polypropylene (PP-g-MA) composites reinforced with acetylated wheat straw fibers (WSF) is reported in this work. The materials were prepared with different fiber particle sizes (40, 80 and 140 U.S. mesh) and at different fiber contents (5, 10 and 15 wt.%). The PP and PP-g-MA composites, where anhydride maleic (MA) was used as coupling agent, were obtained using a twin-screw extruder; whereas an injection-molding machine molded the composite pellets into testing specimens. To observe the morphology of the composites, micrographs were taken with an optical microscope. The Dynamic mechanical properties were analyzed using a torsional rheometer. The morphological analysis showed a high porous structure somehow similar to foamed materials. The storage modulus (G′) increased by increasing the fiber content, and decreased with fiber particle sizes for the PP composites. Meanwhile, the use of the coupling agent additive promoted a modulus increase due to higher fiber-polymer interaction, from better adhesion and chemical bonds formation between the fibers-coupling agent-PP.

Keywords

Compositefiberbiometric (assembly)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1767: Symposium 5C – New Trends in Polymer Chemistry and Characterization , 2015 , pp. 139 - 143
Copyright
Copyright © Materials Research Society 2015 

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References

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