Journal Article10.1007/BF01776201
The evaluation of the structure and hardness of processed plastics by the Vickers microhardness test
J. Bowman,M. Bevis +1 more
59
TL;DR: In this article, the Vickers microhardness test has been used as an additional tool for the determination of the microstructure of an injection moulded semicrystalline thermoplastic.
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Abstract: The Vickers microhardness test has been used as an additional tool for the determination of the microstructure of an injection moulded semicrystalline thermoplastic. The results show for the first time that there is a clear and well defined correlation between microhardness measurements and changes in preferred orientation through the thickness of the mouldings as revealed by acid etching and wide angle X-ray diffraction. Notably, the microhardness test describes, if the necessary precautions are taken, the extent of the different structures and the degree of preferred chain axis orientation within those structures.
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Citations
Weathering of polymers: mechanisms of degradation and stabilization, testing strategies and modelling
J. R. White,Alison E. Turnbull +1 more
TL;DR: In this article, the authors reviewed the mechanisms of degradation and stabilization of polymers, the methods of testing weatherability, and the predictive modelling of weathering behavior, focusing on engineering aspects.
295
Microhardness relating to crystalline polymers
F. J. Baltá Calleja
- 01 Jan 1985
TL;DR: In this article, the authors used the microhardness technique to elucidate the dependence of a variety of local deformational processes upon polymer texture and morphology, which is most suitably defined in terms of the pyramid indentation test.
204
Investigation of early surface delamination observed in retrieved heat-pressed tibial inserts.
TL;DR: Orthopedic surgeons should be aware of early delaminiatin and surface failure in heat-pressed inserts, and there was an increased hardness associated with the crystallinity seen on the heat- presses, when compared to new machined inserts.
82
A novel concept in describing elastic and plastic properties of semicrystalline polymers: polyethylene
TL;DR: In this paper, an analysis of micro-hardness and elastic modulus data for different lamellar systems in the light of both eutectoid copolymer and chain folded microphases is presented.
Relating microhardness of poly(ethylene terephthalate) to microstructure
TL;DR: In this paper, the microhardness of polyethylene terephthalate (PET) was investigated in the light of three principal structural factors: the volume content of spherulites within the material, the value of crystallinity within the stacks of the lamella, which turns out to be a constant; and the average thickness of the crystals.
References
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