LINEAR VISCOELASTIC BEHAVIOR OF DENSELY GRAFTED POLY (CHLOROETHYL VINYL ETHER)-G-POLYSTYRENE COMBS IN THE MELT

Muchtar, Zainuddin and Bailly, Christian and Stephene, Vincent and Schappacher, Michel and Deffieux, Alain (2003) LINEAR VISCOELASTIC BEHAVIOR OF DENSELY GRAFTED POLY (CHLOROETHYL VINYL ETHER)-G-POLYSTYRENE COMBS IN THE MELT. Journal of Rheology, 47 (04). pp. 821-827. ISSN 0148-6055

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Abstract

We have measured the linear viscoelastic behavior in the melt of two densely graftedpoly~chloroethyl vinyl ether!-g-polystyrene comb polymers. Both samples have a backbone ofapproximately 800 ethyl vinyl ether monomers and the fractions of grafted backbone monomers are98% and 10%, respectively. The viscoelastic behavior shows remarkable features. The combpolymer with the highest grafting density shows a power law behavior over five orders of magnitudein frequency. The power law can be understood through a ‘‘Rouse-like’’ motion of the entire chainswith an apparent friction coefficient coming from the fast Rouse dynamics of the short grafts.Alternatively, the same behavior can be described as the signature of a ‘‘fluctuating’’ physical gel.The less densely grafted comb polymer has a more complex behavior. © 2003 The Society ofRheology.

Item Type: Article
Keywords: Visco elastic; Comb polymer; Polystyrene; Polymer; Rheology
Subjects: Q Science > QD Chemistry > QD450 Physical and theoretical chemistry
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Pendidikan Kimia
Depositing User: Mrs Harly Christy Siagian
Date Deposited: 26 Apr 2016 09:25
URI: http://digilib.unimed.ac.id/id/eprint/395

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