Layers of Distinct Mobility in Densely Grafted Dendrimer Arborescent Polymer Hybrids.

Physical Review Letters
Panagiotis KardasisGeorge Floudas

Abstract

Melts of multiarm stars of 1,4-polybutadiene (dendrimer arborescent hybrids) with very high branching functionality (f) and small arm molar mass behave as jammed colloids and show distinct layers of segmental mobility. Three mobility layers were identified, comprising outer, intermediate, and near-core segments, all displaying a Vogel-Fulcher-Tammann temperature dependence. The respective glass temperatures increase as f^{1/2}. Our findings pave the way for further progress in this field by reconsidering previous theoretical treatments based on a single friction coefficient in hybrid nanoparticles such as densely grafted stars.

References

Mar 12, 2010·Nature·Tao Xie
Feb 2, 2015·The Journal of Chemical Physics·Alexandros ChremosPeter F Green
Feb 10, 2020·The Journal of Chemical Physics·Jinpeng FanFrancis W Starr
Oct 22, 2020·ACS Nano·Jiarul MidyaArash Nikoubashman

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Citations

Oct 9, 2021·ACS Nano·Daniele ParisiDimitris Vlassopoulos

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