1. Constraint Release mechanisms for H-Polymers moving in Linear Matrices of varying molar masses
- Author
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Hyojoon Lee, Helen Lentzakis, Taihyun Chang, Salvatore Costanzo, Dimitris Vlassopoulos, Daniel J. Read, Evelyne Van Ruymbeke, Ralph H. Colby, Lentzakis, Helen, Costanzo, Salvatore, Vlassopoulos, Dimitri, Colby, Ralph H., Read, Daniel Jon, Lee, Hyojoon, Chang, Taihyun, van Ruymbeke, Evelyne, and UCL - SST/IMCN - Institute of Condensed Matter and Nanosciences
- Subjects
chemistry.chemical_classification ,Quantitative Biology::Biomolecules ,Materials science ,Molar mass ,Polymers and Plastics ,Dynamics (mechanics) ,Organic Chemistry ,02 engineering and technology ,Polymer ,Quantum entanglement ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Viscoelasticity ,0104 chemical sciences ,Inorganic Chemistry ,Condensed Matter::Soft Condensed Matter ,Matrix (mathematics) ,chemistry ,Chain (algebraic topology) ,Chemical physics ,Materials Chemistry ,Relaxation (approximation) ,0210 nano-technology - Abstract
We investigate the influence of the environment on the relaxation dynamics of well-defined H-polymers diluted in a matrix of linear chains. The molar mass of the linear chain matrix is systematically varied and the relaxation dynamics of the H-polymer is probed by means of linear viscoelastic measurements, with the aim to understand its altered motion in different blends, compared to its pure melt state. Our results indicate that short unentangled linear chains accelerate the relaxation of both the branches and the backbone of the H-polymers by acting as an effective solvent. On the other hand, the relaxation of the H-polymer in an entangled matrix is slowed-down, with the degree of retardation depending on the entanglement number of the linear chains. We show that this retardation can be quantified by considering that the H-polymers are moving in a dilated tube at the rhythm of the motion of the linear matrix.
- Published
- 2019