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Books > Professional & Technical > Mechanical engineering & materials > Materials science
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Polymer Permeability (Hardcover, New edition)
Loot Price: R5,353
Discovery Miles 53 530
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Polymer Permeability (Hardcover, New edition)
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Polymers are permeable, whilst ceramics, glasses and metals are
gener ally impermeable. This may seem a disadvantage in that
polymeric containers may allow loss or contamination of their
contents and aggressive substances such as water will diffuse into
polymeric struc tures such as adhesive joints or fibre-reinforced
composites and cause weakening. However, in some cases permeability
is an advantage, and one particular area where this is so is in the
use of polymers in drug delivery systems. Also, without permeable
polymers, we would not enjoy the wide range of dyed fabrics used in
clothing and furnishing. The fundamental reason for the
permeability of polymers is their relatively high level of
molecular motion, a factor which also leads to their high levels of
creep in comparison with ceramics, glasses and metals. The aim of
this volume is to examine some timely applied aspects of polymer
permeability. In the first chapter basic issues in the mathema tics
of diffusion are introduced, and this is followed by two chapters
where the fundamental aspects of diffusion in polymers are
presented. The following chapters, then, each examine some area of
applied science where permeability is a key issue. Each chapter is
reasonably self-contained and intended to be informative without
frequent outside reference. This inevitably leads to some
repetition, but it is hoped that this is not excessive."
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