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Updated: Jul 16, 2026

Controlled Synthesis and Fluorescence Tracking of Highly Uniform Poly(N-isopropylacrylamide) Microgels
Published on: September 8, 2016
New class of dynamics in concentrated polymer gels
C Svanberg1, T Uematsu, P Berntsen
1Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden. svanberg@fy.chalmers.se
Abstract:
We show that concentrated poly(methyl methacrylate) solution exhibits a new class of coupled dynamics, which can be regarded as an intermediate between the collective diffusion of solutions and the structural relaxations of glasses. This class of dynamics have a relaxation rate that is directly proportional to the wave vector. The transition from diffusive to coupled collective dynamics occurs at smaller length scales with increasing polymer concentration and decreasing temperature. The experimental observations can be understood by considering the contributions from physical cross-links interconnected by stiff polymer segments.
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