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Processing and Properties of UHMWPE Autocomposite: Nascent Particles in Recrystallized Matrix pp. 211-234 $100.00
Authors:  (Olivier Lame and Gerar Vigier)
Abstract:
The nascent UHMWPE powder is industrially processed by ram extrusion or
compression molding. These processes require much time and expense, which limit the
use of UHMWPE for many applications. However, the need to produce very high
performance polymers in particular very long chain polymers is strong. The High
Velocity Compaction is a new process which consists in applying high velocity impacts
on a powder-filled die. It allows the processing of very high viscosity polymers. It is
assumed that sintering occurs thanks to partial melting which permits bonding particle
interfaces after recrystallization. As only a fraction of the powder is melt, an
“autocomposite” microstructure is obtained containing residual nascent material and
recrystallized material. Indeed, thanks to HVC, a significant amount of nascent structure
is preserved in the final material which improves significantly the mechanical properties
as the crystallinity of nascent phase is significantly higher than the recrystallized one. In
addition, from a more academic point of view, HVC provides the opportunity to study
more deeply the mechanical properties of nascent materials. This paper gives an overall
view of the recent studies concerning UHMWPE and POM. 


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Processing and Properties of UHMWPE Autocomposite: Nascent Particles in Recrystallized Matrix pp. 211-234