Abstract
The structure and properties of polypropylene (PP) and ethylene propylene copolymer (EPR) blends filled with BaSO4 have been investigated. The aspect of structure control concerned was the separate dispersion of filler and rubber in the PP matrix or encapsulation of the filler in the rubber phase. The former structure prevails in the PP/EPR/BaSO4 systems, and addition of maleic anhydride-grafted polypropylene (MAPP) enhances the adhesion between the PP matrix and the filler. Encapsulation of the filler particles into the elastomer takes place when maleated EPR-rubber (EPMA) is used, and the encapsulated structure prevails even under the severe shearing conditions of injection molding. The improved matrix/filler adhesion resulted in increased yield stress and tensile strength, but decreased impact resistance. The particle size of the filler proved to be a crucial factor; below a certain particle size aggregation becomes a dominating factor. Extensive aggregation leads to the deterioration of all mechanical properties, especially to decreased impact strength.
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References
J. Karger-kocsis, “Polypropylene. Structure, Blends and Composites” (Chapman and Hall, London, 1985).
Mitsubishi Kagaku KK, JP 07118462-Impact-resistant and rigid automobile bumpers made of polyolefin compositions-Mitsubishi Kagaku Kk, Japan; Nissan Motor.
Sumitomo Chemical Co. Ltd., EP 580069-Injection molding compositions for automobile bumpers-Sumitomo Chemical Co. Ltd.,Japan; Toyota Jidosha Kabushiki Kaisha.
Idemitsu Petrochemical Co. Ltd., JP 02251547-Polyolefin compositions for automobile bumpers-Idemitsu Petrochemical Co. Ltd., Japan.
J. Janc´ar and A. T. Dibenedetto, J. Mater. Sci. 30(1995) 2438.
Idem., ibid. 30(1995) 1601.
E. K. L. Lau, SPE ANTEC 50(1) (1992) 310.
G. Marosi, G. Bertalan, P. Anna and I. Ruszn´ak, J. Polym. Eng. 12(1993) 33.
W.-Y. Chiang, W.-D. Yang and B. Puk´anszky, Polym. Eng. Sci. 34(1994) 485.
E. Lau and J. Goodman, J. Elastomers Plast. 25(1993) 322.
B. Puk´anszky, F. T¨udõs, J. Kolar´ik and F. Lednick´y, Polym. Compos. 11(2) (1990) 98.
C. O. Hammer and F. H. J. Maurer, J. Adhesion 64(1997) 61.
C. O. Hammer and F. H. J. Maurer, Polym. Compos. 19(1998) 116.
Idem., Comp. Interfaces 5(1998) 241.
J. Kolar´ik, F. Lednick´y and B. Puk´anszky, Proceedings of 6th ICCM/2nd ECCM, edited by F. L. Matthews, N. C. R. Buskell, J. M. Hodgkinson and J. Morton (Elsevier, London, 1987) vol. 1., p. 452.
D. Tabor, in “Tribology in Particulate Technology,” edited by B. J. Briscoe and M. J. Adams (Adam Hilger, Bristol, 1987) p. 206.
M. J. Adams and B. Edmondson, in “Tribology in Particulate Technology,” edited by B. J. Briscoe and M. J. Adams (Adam Hilger, Bristol, 1987) p. 154.
S. L. Goren, J. Colloid Interface Sci. 36(1971) 94.
B. Puk´anszky, F. T¨udõs, J. Kolar´ik and F. Lednick ´y, Compos. Polym. 2(1989) 491.
F. H. J. Maurer, in “Polymer Composites,” edited by B. Sedl´acek (Walter de Gruyter, Berlin, 1986) p. 399.
A. L. Persson and H. Bertilsson, Polymer 18(1998) 4183.
Idem., ibid. 23(1998) 5633.
D. Quintens, G. Groeninckx, M. Guest and L. Aerts, Polym. Eng. Sci. 30(1990) 1474.
Idem., ibid. 31(1991) 1207.
B. Puk´anszky and F. H. J. Maurer, Polymer 36(1995) 1617.
B. Puk´anszky, in Ref. 1, 3, p. 1–70.
B. Puk´anszky, B. Turcs´anyi and F. T¨udõs, in “Polymer, Ceramic, and Metal Matrix Composites,” edited by H. Ishida (Elsevier, New York, 1988) p. 467.
B. Puk´anszky, Composites 21(1990) 255.
V. Svehlova and E. Poloucek, Angew. Makromol. Chem. 153(1987) 197.
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Hammer, C.O., Maurer, F.H.J., Molnár, S. et al. Control of the structure and properties of barium sulphate-filled blends of polypropylene and ethylene propylene copolymers. Journal of Materials Science 34, 5911–5918 (1999). https://doi.org/10.1023/A:1004799327190
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DOI: https://doi.org/10.1023/A:1004799327190