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Developments in Polymer Characterisation-4 (Paperback, Softcover reprint of the original 1st ed. 1983)
Loot Price: R1,521
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Developments in Polymer Characterisation-4 (Paperback, Softcover reprint of the original 1st ed. 1983)
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This volume includes reviews on tackling polymer characterisation
problems and on developing specific characterisation techniques.
The first two chapters and the last chapter describe progress in
providing character isation information for polymers containing
long-chain branching, for polymer blends, and for polymers having
preferred orientation. The remaining chapters review progress in
individual techniques, showing with examples the characterisation
results which may be obtained. It is recognised that the degree of
chain branching which can evolve in some polymerisation processes
can have a marked effect on the flow properties of a polymer, and
therefore on polymer processing behaviour. In the first chapter the
characterisation of long-chain branching from measurements of the
molecular size and molar mass of a polymer in dilute solution is
outlined. It is indicated that a complete characterisation of
branching requires the combined use of several techniques,
emphasising in particular recent developments involving gel
permeation chromatography. Thermal analysis and infrared
spectroscopy are widely used techniques in polymer
characterisation. Both techniques can provide, very quickly,
significant results with readily available instrumentation. This is
illustrated by the review of the characterisation of polymer blends
by thermal analysis in Chapter 2. An assessment of blend
morphology, which influences the behaviour of a material consisting
of two or more polymers, is presented in terms of transition
temperatures. Conventional infrared spectroscopy involves
dispersive spectrometers which do not always provide accurate
information on composition and structure for complex polymeric
materials."
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