COMPARISON OF RHEOLOGICAL AND MECHANICAL PROPERTIES OF MODIFIED POLYPROPYLENE – SHORT GLASS FIBER COMPOSITES
Abstract
Short glass fiber (SGF) reinforced composite materials were principally fabricated using polypropylene (PP) as thermoplastic matrix. Short glass fiber and polypropylene frequently suffer from lack of adequate fiber-matrix adhesion. This problem was addressed by grafting polypropylene (PP) with maleic anhydride (MA) in the presence of benzyl peroxide (BPO) as an initiator. The results revealed that by increasing fiber contents from 5 to 40 %, tensile strength increases while elongation at break decreases. Rheological behavior was found to be pseudoplastic, whereas viscosity increases by increasing SGF contents. A decrease in die swell was observed with increase in SGF contents.References
J. Jancar and A. T. Dibenedetto, Journal of
Material Science, Springer link 30, No.6
(1995) 1601.
V. Wigotsky, Plastics Engineering 57, No. 9
(2001) 28.
D.M. Laura, H. Keskkula, J.W. Barlow and
D.R. Paul, Polymer, Elsevier 41, No.19
(2000) 7165.
Weizhi Wang, Longxiang Tang and Baojun
Qu, Journal Science Direct 39, No. 11 (2003)
M. N. Bureau and J. Denault, Composites,
Elsevier 64, No. 12 (2004) 1785.
E. Ségard, S. Benmedakhene, A. Laksimi
and D. Lai, Elsevier 60, No. 1 (2003) 67.
Fu S.Y.B.Lauke, E.Mader, Yue and C.Y, Hux,
Applied Science and Manufacturing, Elsevier
, No. 10 (2000) 1117.
M. Sepher, G. Ausias and P.J. Carreau,
Journal of Non-Newtonian Fluid Mechanics,
Elsevier 123, No. 1 (2004) 19.
A. M. Henderson and A. Rudin, Journal of
Applied Polymer Science 31, No. 2 (1986)
F.N. Cogswell, Polymer Melt Rheology,
George Godwin, London (1981).
N. Sombatsompop and N.T. Intawong,
Polymer Testing 24, No. 8 (2005) 948.
T. Nishimura and T. Kataoka, Rheologica
Acta 23 No. 4 (1984) 401.
N. Muksing, M. Nithitanakul, B.P. Grady and
R. Magaraphan, Polymer Testing 27, No. 4
(2008) 470.
A.V. Shenoy and D.R.Saini, Thermoplastic
Melt Rheology and Processing, Marcel
Dekker, Inc. (1996) p. 100-130.
G.S Joseph, S.R. Thomas and K.T.
Varughese, Polymer, Elsevier 36, No. 23
(1995) 4405.