Study of the mechanical properties of mica-filled polypropylene-based GMT composite

Mica‐filled polypropylene (PP)‐based GMT (PP–mica–GMT) was prepared by a double‐belt press and its mechanical properties were tested. The effect of the mica content on the mechanical properties of PP–mica–GMT was investigated. It was found that with a lower mica content in matrix the tensile and fle...

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Bibliographic Details
Published in:Journal of applied polymer science 2001-12, Vol.82 (11), p.2719-2728
Main Authors: Zhao, Ruofei, Huang, Jin, Sun, Bin, Dai, Gance
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
glass fiber-reinforced thermoplastic
interfaces
mechanical properties
mica
poly(propylene)
Polymer industry, paints, wood
Technology of polymers
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Summary:Mica‐filled polypropylene (PP)‐based GMT (PP–mica–GMT) was prepared by a double‐belt press and its mechanical properties were tested. The effect of the mica content on the mechanical properties of PP–mica–GMT was investigated. It was found that with a lower mica content in matrix the tensile and flexural properties were improved; however, at a high mica content level, the tensile and flexural properties decreased. With respect to the impact strength, there is a maximum value at an approximate 20 wt % mica content level. These results were attributed to the influence of mica on fiber–matrix adhesion. It is most likely that low mica content enhances fiber–matrix adhesion; however, high mica content is unfavorable to fiber–matrix adhesion. Maleic anhydride‐grafted PP (MPP) was used to enhance the fiber–matrix adhesion at a higher mica loading level for PP–mica–GMT. With increasing MPP content in the matrix, the tensile properties were significantly improved, whereas the Izod impact strength decreased. In addition, with 5 wt % MPP and 40 wt % mica in the PP matrix formulation, the effect of the mica particle size and glass fiber content on the mechanical properties of PP–mica–GMT was investigated. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2719–2728, 2001
ISSN:0021-8995
1097-4628
DOI:10.1002/app.2124