Reference : Dynamic properties of the transient network formed by telechelic ionomers studied by dyn...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/15775
Dynamic properties of the transient network formed by telechelic ionomers studied by dynamic light scattering and dynamic mechanical analysis
English
Johannsson, Ragnar [Université du Maine, Le Mans, France > > Laboratoire de Physico Chimie Macromoléculaire > >]
Chassenieux, Christophe [Université du Maine, Le Mans, France > > Laboratoire de Physico Chimie Macromoléculaire > >]
Durand, Dominique [Université du Maine, Le Mans, France > > Laboratoire de Physico Chimie Macromoléculaire > >]
Nicolai, Taco [Université du Maine, Le Mans, France > > Laboratoire de Physico Chimie Macromoléculaire > >]
Vanhoorne, Pierre [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
4-Dec-1995
Macromolecules
Amer Chemical Soc
28
25
8504-8510
Yes (verified by ORBi)
International
0024-9297
Washington
[en] halatotelechelic polymer
[en] Solutions of alpha,omega-sodium sulfonatopolyisoprene (alpha,omega NaPIPS) in toluene are studied using static and dynamic light scattering and dynamic mechanical analysis. At concentrations above 4 g/L, which is well below the overlap concentration of the polymer chains (C*), a transient network is formed characterized by a plateau modulus at high frequencies and a relatively narrow viscoelastic relaxation time distribution. The intensity autocorrelation function of the transient network shows two relaxational modes: a relatively fast diffusional mode close to the co-operative diffusional mode of semidilute solutions of the unfunctionalized polymers and a slow broader mode which becomes independent of the scattering angle at a concentrations close to C*. The relation between this slow mode and the viscoelastic relaxation is discussed. Both the slow mode and the viscoelastic relaxation processes have an Arrhenius temperature dependence with the same activation energy, E(a) = 25 kJ/mol.
Center for Education and Research on Macromolecules (CERM)
Researchers
http://hdl.handle.net/2268/15775
10.1021/ma00129a006
http://pubs.acs.org/doi/pdf/10.1021/ma00129a006

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