Interrelation between dynamic moduli and compliances in polymers

Theocaris, PS

dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:05:27Z
dc.date.available	2014-03-01T01:05:27Z
dc.date.issued	1969	en
dc.identifier.issn	00232904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/8845
dc.subject	Indexation	en
dc.title	Interrelation between dynamic moduli and compliances in polymers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF01542525	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF01542525	en
heal.publicationDate	1969	en
heal.abstract	Based on the fact that, for a large number of polymers, the lateral deformation in tension is a contraction and the volume dilatation must be positive, bounds were established for the values of the lateral contraction ratio functions in creep and relaxation. These bounds are that v=(v′ -i v″) must be positive and smaller than 0.5. It was shown in the paper that in the case when v is positive, the loss tangents for various modes of deformation in relaxation or creep follow the relations: a) For relaxation: tan δG > tan δE > tan δm > tan δK > tan δvr b) For creep: tan δj > tan δD > tan δM > tan δB > tan δvc where the indices G and J correspond to a shear mode of deformation in relaxation or creep, the indices E and D to extension, the index M to longitudinal bulk, the indices K and B to bulk deformation and v r and v c to the LCR functions in relaxation or creep. Extensive experimental evidence with various types of polymers submitted to different modes of loading corroborates with the results of the theory. © 1969 Dr. Dietrich Steinkopff Verlag.	en
heal.journalName	Kolloid-Zeitschrift und Zeitschrift für Polymere	en
dc.identifier.doi	10.1007/BF01542525	en
dc.identifier.volume	235	en
dc.identifier.issue	1	en
dc.identifier.spage	1182	en
dc.identifier.epage	1188	en