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The design and application of a microfoil tensile test apparatus for monitoring the degree of ultraviolet degradation of polymers (1991)

de Bruijn, J. C. M. ; Meijer, H. D. F.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 62 (1991), S. 1620-1623

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: A microfoil tensile test apparatus has been developed to determine the tensile strength of thin slices cut from the surface of uv-degraded plastic products. It will be shown that it is possible to obtain data on the degree and depth of ultraviolet degradation in polypropylene copolymer and high-density polyethylene with the microfoil tensile test apparatus and to relate this to the impact resistance. The results are in agreement with the results determined by infrared spectroscopy but are obtained in less time and more accurately. The influences of sample preparation and geometry, elapsed time after microtoming, and method of processing on the tensile strength, will be discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1142441

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Natural Fibre Mat Thermoplastic Products from a Processor's Point of View (2000)

de Bruijn, J. C. M.

Springer

Applied composite materials 7 (2000), S. 415-420

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ISSN: 1573-4897

Keywords: composites ; automotive ; natural fibres ; processing

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract Natural fibres have significant advantages over glass, as an alternative fibre reinforcement material. Natural fibres are more environmentally friendly, healthier and safer, and cause less abrasive wear of processing equipment. On the other hand, their mechanical properties show a large scatter, and are at best equivalent to glass (natural fibres, however, have a lower density). Further disadvantages of the current natural fibre reinforced materials are their moisture sensitivity – which makes them prone to swelling and rotting – their smell and their current cost level. Experiments with the application of Natural Fibre Mat Thermoplastics (NMT) on current automotive products proved the disadvantages. On the other hand it yielded several new research themes concerning property limits and gave insight in the area's where to optimize in order to get a broad application of natural fibre reinforced plastic products. Looking towards the long term, other alternatives, like bio-composites or all-PP composites should be further explored.