Contributions of polystyrene to the mechanical properties of blended mixture of old newspaper and wood pulp

Composites from recycled newspaper would result in the effective use of the waste product which is currently burned or land-filled, as well as potential reduction in the cost of manufactured composite. In this work, old newspaper (ONP) together with yellowish wood pulp and waste polystyrene from pac...

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Bibliographic Details
Published in:	Carbohydrate polymers Vol. 76; no. 3; pp. 417 - 421
Main Authors:	Nassar, M.A., Abdelwahab, N.A., Elhalawany, N.R.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 09-04-2009 Elsevier
Subjects:	Applied sciences Composites Exact sciences and technology Grafted polystyrene Miscellaneous Old newsprint Paper, paperboard, non wovens Polymer industry, paints, wood Technology of polymers Waste treatment Wood pulp Wood. Paper. Non wovens Wood pulp Composites Grafted polystyrene Old newsprint Graft copolymer Paper pulp Mechanical properties Experimental study Grafting Composite material Acrylonitrile copolymer Morphology Preparation Ethyl methacrylate copolymer Styrene polymer Water absorption Recycling Waste paper Butyl methacrylate copolymer Plastic waste Styrene copolymer
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Summary:	Composites from recycled newspaper would result in the effective use of the waste product which is currently burned or land-filled, as well as potential reduction in the cost of manufactured composite. In this work, old newspaper (ONP) together with yellowish wood pulp and waste polystyrene from packaging were used to produce composite. The technique studied in this work is an alternative to the conventional melt compounding and was expected to provide efficient wetting of fibers by the polymer. Polystyrene was grafted with acrylonitrile, ethylmethacrylate and butylmethacrylate, respectively, using benzoyl peroxide as an initiator. The amount of polystyrene to monomer is 1:0.75 and to initiator is 1:1. The grafted copolymers were characterized using thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). Different ratios of waste polystyrene or grafted waste polystyrene were mixed with a blend of old newsprint and wood pulp to form composites. The mechanical properties of these composites as well as water uptake were studied. The tensile properties of the prepared composites did not show essential improvement, except for the modulus of elasticity. Scanning electron microscopy indicate that composites with grafted polystyrene showed more homogeneity than the composite with polystyrene and also than blank, so the grafted polymer is distributed very well improving the mechanical properties of the composites. Strong adhesion between the fiber and grafted polymer was found.
ISSN:	0144-8617 1879-1344
DOI:	10.1016/j.carbpol.2008.11.039