Effect of single-mineral filler and hybrid-mineral filler additives on the properties of polypropylene composites.

Nurdina, A.K., Mariatti, M. and Palaniandy, Samayamutthirian (2009) Effect of single-mineral filler and hybrid-mineral filler additives on the properties of polypropylene composites.. Journal of Vinyl and Additive Technology, 15 1: 20-28.


Author Nurdina, A.K.
Mariatti, M.
Palaniandy, Samayamutthirian
Title Effect of single-mineral filler and hybrid-mineral filler additives on the properties of polypropylene composites.
Journal name Journal of Vinyl and Additive Technology
Publication date 2009
Sub-type Article
DOI 10.1002/vnl.20173
Volume number 15
Issue number 1
ISSN 1083-5601; 1548-0585
Start page 20
End page 28
Total pages 9
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons, Inc.
Language eng
Formatted abstract The present study was carried out to determine the filler characteristics and to investigate the effects of three types of mineral fillers (CaCO 3, silica, and mica) and filler loadings (10-40 wt%) on the properties of polypropylene (PP) composites. The characteristics of the particulate fillers, such as mean particle size, particle size distribution, aspect ratio, shape, and degree of crystallinity were identified. In terms of mechanical properties, for all of the filled PP composites, Young's modulus increased, whereas tensile strength and strain at break decreased as the filler loading increased. However, 10 wt% of mica in a PP composite showed a tensile strength comparable with that of unfilled PP. Greater tensile strength of mica/PP composites compared to that of the other composites was observed because of lower percentages of voids and a higher aspect ratio of the filler. Mica/PP also exhibited a lower coefficient of thermal expansion (CTE) compared to that of the other composites. This difference was due to a lower degree of crystallinity of the filler and the CTE value of the mica filler. Scanning electron microscopy was used to examine the structure of fracture surfaces, and there was a gradual change in tensile fracture behavior from ductile to brittle as the filler loading increased. The nucleating ability of the fillers was studied with differential scanning calorimetry, and a drop in crystallinity of the composites was observed with the addition of mineral filler. Studies on the hybridization effect of different (silica and mica) filler ratios on the properties of PP hybrid composites showed that the addition of mica to silica-PP composites enhanced their tensile strength and modulus. © 2009 Society of Plastics Engineers.
Keyword Aspect ratio
Brittle fracture
Differential Scanning Calorimetry
Ductile fracture
Loading
Mechanical properties
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article
Collections: Julius Kruttschnitt Mineral Research Centre Publications
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Created: Tue, 22 Nov 2011, 15:46:30 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre