Effect of modifying additions on the physicomechanical properties of composites based on polyethylene and wastes from linen yarn production |
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| Authors: | Ya A Kayaks V N Bulmanis S A Reikhmane M G Tsiprin |
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| Institution: | (1) Institute of Polymer Materials of Riga Technical University, LV-1006 Riga, Latvia;(2) Institute of Polymer Mechanics of the Latvian Academy of Sciences, LV-1006 Riga, Latvia |
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| Abstract: | This article examines the feasibility of using coupling agents to alleviate the shortcomings characteristics of materials that contain natural fibers: low water resistance and a high degree of heterogeneity. A determination is made of the effect of additions of polyisocyanate and stearic acid on the fluidity of the melts and the strainstrength properties and water resistance of polyethylene composites containing mixtures of wastes from linen yarn production. It is shown that an addition of stearic acid significantly improves the dispersion of fibers in the composites, which in turn leads to a reduction in melt fluidity and an increase in elastic modulus in the high-filler-content region compared to composites that do not have additions of stearic acid. Additions of polyisocyanate appreciably increase the strength and water resistance of the given composites.Translated from Mekhanika Kompozitnykh Materialov, Vol. 33, No. 4, pp. 540–547, July–August, 1997. |
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