13—CELLULOSIC COMPOSITE FIBRES

Abstract

An account is given of an investigation in which gross particles consisting of either jute or viscose rayon fibres of different lengths and diameters were spun in both secondary cellulose acetate filaments and a polyurethane elastomer in order to verify whether a significant degree of reinforcement was possible with a composite material of this type. The mechanical properties of the composite cellulose acetate fibres were studied, and it is shown that both types of filler produced a decrease in breaking extension and an increase in initial modulus with increasing filler content. The strength of the jute-filled material is also shown to increase. Similar effects on the breaking extension and initial modulus of the rayon-filled polyurethane filaments were observed, and here there was also a decrease in strength that arose from the difference in extensibility between the rayon and the polyurethane filament.

KEY WORDS (SPECIFIC TERMS):

• BREAKING ELONGATION
• INITIAL MODULUS
• BREAKING STRENGTH
• BENDING RIGIDITY
• ASPECT RATIO
• STRESS–STRAIN PROPERTIES (TENSILE)
• STRESS–STRAIN CURVES
• SURFACE AREA
• INTERFACIAL AREA
• MICROSCOPY
• JUTE
• VISCOSE RAYON
• ACETATE FIBRES
• POLYURETHANES
• POLYURETHANE FIBRES
• ELASTOMERS
• ELASTOMER FIBRES
• FIBRE-REINFORCED COMPOSITES
• FILLER
• FILAMENTS
• SURFACES
• INTERFACES

KEY WORDS (BROADER TERMS):

• STRAIN
• MECHANICAL PROPERTIES
• BAST FIBRES
• RAYON (REGENERATED-CELLULOSE FIBRES)
• CELLULOSIC FIBRES
• MAN-MADE FIBRES
• COMPOSITES
• REINFORCED COMPOSITES