Paper Number
PM23
Session
Polymer Melts: From Molecular Rheology to Processing
Title
Decoding the viscoelastic properties of metallo-supramolecular networks moving in a linear polymer matrix
Presentation Date and Time
October 17, 2018 (Wednesday) 3:45
Track / Room
Track 2 / Plaza I
Authors
- van Ruymbeke, Evelyne (Univeriste catholique de Louvain, Bio and Soft Matter - IMCN)
- Zhuge, Flanco (Univeriste catholique de Louvain, Bio and Soft Matter - IMCN)
Author and Affiliation Lines
Evelyne van Ruymbeke and Flanco Zhuge
Bio and Soft Matter - IMCN, Univeriste catholique de Louvain, Louvain-La-Neuve, Belgium
Speaker / Presenter
van Ruymbeke, Evelyne
Text of Abstract
Investigating and modelling the viscoelastic properties of binary blends composed of two monodisperse polymers is still, today, a challenge. In particular, this requires taking into account the fact that the long component can relax either by moving in a thin tube representing the influence of all the surrounding entanglements, or by moving in a dilated tube, which only considers the entanglements between the long component, but at the rhythm of the motion of the short chains. This also requires to properly take into account the dynamic tube dilation effect induced by the short chains. In the present work, we first discuss the relaxation of various binary blends, in which the slow component can be linear, star-like or H-like polymer, and is diluted in different short linear matrices. We then extend this study to the relaxation of binary blends composed of metallo-supramolecular star molecules diluted in different linear matrices. By playing with the concentration of supramolecular stars as well as with the molar mass of the linear polymer, we systematically investigate the influence of the short chains motion on the relaxation of the network. We also study the influence of temperature and nature of the metal ions on the lifetime of the transient bonds. The results are then rationalized, based on the TMA tube model that we have recently developed to describe the viscoelastic properties of supramolecular entangled polymers.