Abstract
Whether a polymer chain forms a permanent or temporary entanglement or crosslink; one of the most drammatic effects which is observed is the modification of the dynamic spectrum exhibited by the polymer chain. The other manifestation of network formation is the observation of a modulus value which is directly related to the number of network points per unit volume. In general, we can divide networks into two types; firstly, those in which the chains between the network points are topographically defined in space — “rigid networks” and secondly, those that have flexible regions between junction points —“flexible networks”. The most characteristic feature of the dynamics of a polymer chain is its glass transition temperature - Tg. Above Tg, elements of the polymer chain can undergo co-operative molecular motion, below Tg only the uncorrelated motion of short elements of the backbone and side chains are possible. The division of the networks into rigid and flexible can be made on the basis of the glass transition temperature of the backbone polymer structure.
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Recommended Reading
RA Pethrick, Ultrasonic Studies of Macromolecules, Prog Polym Sci 9 197–295 (1983)
JD Ferry Viscoelastic Properties of Macromolecules Interscience New York London 1978
RT Bailey AM North and RA Pethrick Molecular Motion in High Polymers Pergamon Oxford 1981
Specific Papers
RA Pethrick and AM Abubaker Polymer Communications 27 194–196 1986
RA Pethrick RR Rahalker J Lamb G Harrison AJ Barlow W Hawthorne JA Semlyen and AM North Proc Roy Soc London A394 207–222 1984
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© 1990 Kluwer Academic Publishers
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Pethrick, R.A. (1990). Ultrasonic and Viscoelastic Studies of Chain Entanglement in Polymer Solutions. In: Güven, O. (eds) Crosslinking and Scission in Polymers. NATO ASI Series, vol 292. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1924-2_8
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DOI: https://doi.org/10.1007/978-94-009-1924-2_8
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7359-2
Online ISBN: 978-94-009-1924-2
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