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Nonlinear Phenomena In Flows Of Viscoelastic Polymer Fluids

RRP $1.00

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This monograph presents theoretical and experimental studies of flows of elastic liquids. Falling into this category are particularly the melts and concentrated solutions of such flexible-chain polymers as polyethylene, polyisobutylene and polypropylene, all of which are widely used in polymer processing. These polydisperse polymers vary greatly, from batch to batch, in their mechanical properties and 20% variation in a property is believed to be good enough. l 7 All recent books - devoted to the rheology of polymers do not answer the question of which constitutive equations should be used for solving the fluid mechanic problems of polymer processing in the usual case of an appreciable nonlinear region of deformation where nonlinear effects of shear and extensional elasticity are very important. Viscoelastic constitut- ive equations cited commonly (see, e.g. Refs 5 and 6) do not describe simultaneously even the simplest cases of deformations, viz. simple shear and uniaxial extension. Moreover, some of them are internally inconsist- ent and sometimes display highly unstable behaviour in simple flows without any fundamental reasons. Even more respected molecular ap- free from these defects.


A Florist's Notebook

RRP $16.99

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*New and updated* Now featuring 100 puzzles and including blank 'to do' & list pages -Over 100 pages of lined note paper -100 challenging puzzles. 17 puzzle types including sudoku, anagrams and number puzzles. -High quality paper. Perfect for notes & scribbles -Handy pocket size (5x8 inches) with gloss cover finish Available in a large range of job titles with personalised covers (please note this is part of a gift range and only the cover is personalised to the job title) For other puzzle books and gift ideas, visit www.puzzle-book.co.uk



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