Abstract

In situ initiation of strong crystalline fibres in a polymer melt can be achieved in a counter rotating twin screw extruder at temperatures slightly higher than the melting temperature of the polymer. The resulting reinforcement not only increases the tensile strength in the main fibre direction but also in the perpendicular direction. The fibres can be detected microscopically and by X-ray diffraction combined with annealing techniques. The exploratory work reported here indicates possibilities to produce a matrix of fibres filled with solidified melt.

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