Signature of multiple glassy states in micellar nanoparticle-polymer composites

2008/09/11 by A. K. Kandar, Kandar, A. K., S. K. Srivastava +9
Chemistry · Materials Science · #FOS: Physical sciences #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Pickering emulsions and particle stabilization #Soft Condensed Matter (cond-mat.soft) #Surfactants and Colloidal Systems

paper · pdf · doi:10.48550/arxiv.0809.2004

openalex publication_date 2008/09/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present results of temperature dependent measurements of dynamics of micellar nanoparticle - polymer composites of fixed volume fraction and variable polymer chain grafting density. For nanoparticles with lower grafting density we observe dynamically arrested state at low temperatures corresponding to an attractive glass while at high temperature the same system shows relaxation typical of a repulsive glass. For higher grafting density, the low temperature dynamics resembles more of a gel which crosses over to a repulsive glass at high temperature. Possible reasons for such fascinating dynamical transitions is delineated.

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