Influence of surface treatment on hybrid wollastonite-polyethylene composite resins for rotational moulding
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The purpose of this research was to develop a reinforcing material for polyethylene-based composite manufacture by rotational moulding. Wollastonite, sisal fibres and PE are premixed by blending and compounding with a single screw extruder and then granulated to particles with diameter about 0.5 mm prior to rotational moulding, for which the mixture is placed in a mould that is heated from the outside to 250 °C for a period of about 10 min. Aminosilane was used as a surface treatment for wollastonite. It was found that incorporating wollastonite microfibres improved the tensile properties of the system. When wollastonite fibres were coated with aminosilane, the impact strength and processability were enhanced greatly. Sisal fibres were added to improve the impact properties. Scanning electron microscopy revealed good adhesion between the coated fibre reinforcement and the polyethylene matrix at the fracture surface. The mechanism of this phenomenon is discussed.
KeywordsImpact Strength Coupling Agent Wollastonite Calcium Silicate Melt Flow Index
The authors are grateful for the assistance of Mr Clive Bolt, and financial assistance from the Foundation for Research Science & Technology New Zealand.
- 2.Crawford RJ, Robert A (2002) In: Bhattacharyya D, Jayaraman K, Lin R (eds) Proceedings of the 3rd Asian–Australasian conference on composite materials 2002 (ACCM-3), The University of Auckland, Auckland, New Zealand, pp 1–9Google Scholar
- 3.Ciullo PA (2002) In: Paint & coating industry magazine, R.T. Vanderbilt Co. Inc., NovemberGoogle Scholar
- 7.Ng CB, Ash BJ, Schadler LS et al (2001) Adv Compos Lett 10(3):101Google Scholar
- 14.Singh YP, Shah DP, Ankleshwaria BV et al (1991) In: Sivaram S (ed) Polymer science contemporary themes, vol II. Tata McGraw-Hill, N. Delhi, pp 965–970Google Scholar
- 15.Choate WL (1978) In: Katz HS, Milewski JV (eds) Handbook of fillers and reinforcements for plastics. Von Nostrand Reinhold Company, New York, New York, pp 405–414Google Scholar
- 17.Jacobson RE, Caulfield DF (2003) The seventh international conference on woodfiber-plastic composites (and other natural fibers), Forest Products Society, Madison, Wisconsin, USA, pp 271–276Google Scholar
- 18.Arkles B (2004) Silane coupling agents: connecting across boundaries. Gelest, Inc., Morrisville, PA, p 17Google Scholar