Constraint Release Mechanisms for H-Polymers Moving in Linear Matrices of Varying Molar Masses

Helen Lentzakis, Salvatore Costanzo, DImitris Vlassopoulos, Ralph H. Colby, Daniel Jon Read, Hyojoon Lee, Taihyun Chang, Evelyne Van Ruymbeke

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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.

Original languageEnglish (US)
Pages (from-to)3010-3028
Number of pages19
JournalMacromolecules
Volume52
Issue number8
DOIs
StatePublished - Apr 23 2019

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Lentzakis, H., Costanzo, S., Vlassopoulos, DI., Colby, R. H., Read, D. J., Lee, H., Chang, T., & Ruymbeke, E. V. (2019). Constraint Release Mechanisms for H-Polymers Moving in Linear Matrices of Varying Molar Masses. Macromolecules, 52(8), 3010-3028. https://doi.org/10.1021/acs.macromol.9b00251