Role of fibre–fibre and fibre–matrix adhesion in stress transfer in composites made from resin-impregnated paper sheets

Paper-reinforced plastics are gaining increased interest as packaging materials, where mechanical properties are of great importance. Strength and stress transfer in paper sheets are controlled by fibre–fibre bonds. In paper-reinforced plastics, where the sheet is impregnated with a polymer resin, o...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2009-07, Vol.29 (5), p.551-557
Main Authors: Almgren, K.M., Gamstedt, E.K., Nygård, P., Malmberg, F., Lindblad, J., Lindström, M.
Format: Article
Language:English
Subjects:
Annan kemiteknik
Applied sciences
B. Composites
B. Wood
Bildanalys
C. Microscopy
Cellulosa- och pappersteknik
Cellulose and paper engineering
Chemical engineering
Chemical process and manufacturing engineering
Composites
Computerized Image Analysis
Datoriserad bildanalys
Engineering mechanics
Exact sciences and technology
Forms of application and semi-finished materials
Image analysis
Information technology
Informationsteknik
Kemisk process- och produktionsteknik
Kemiteknik
Laminates
Microscopy
Other Chemical Engineering
Polymer industry, paints, wood
TECHNOLOGY
Technology of polymers
TEKNIKVETENSKAP
Teknisk mekanik
Wood
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Summary:Paper-reinforced plastics are gaining increased interest as packaging materials, where mechanical properties are of great importance. Strength and stress transfer in paper sheets are controlled by fibre–fibre bonds. In paper-reinforced plastics, where the sheet is impregnated with a polymer resin, other stress-transfer mechanisms may be more important. The influence of fibre–fibre bonds on the strength of paper-reinforced plastics was therefore investigated. Paper sheets with different degrees of fibre–fibre bonding were manufactured and used as reinforcement in a polymeric matrix. Image analysis tools were used to verify that the difference in the degree of fibre–fibre bonding had been preserved in the composite materials. Strength and stiffness of the composites were experimentally determined and showed no correlation to the degree of fibre–fibre bonding, in contrast to the behaviour of unimpregnated paper sheets. The degree of fibre–fibre bonding is therefore believed to have little importance in this type of material, where stress is mainly transferred through the fibre–matrix interface.
ISSN:0143-7496
1879-0127
1879-0127
DOI:10.1016/j.ijadhadh.2008.11.002