The Ultrasensitivity of Living Polymers

Details The Ultrasensitivity of Living Polymers The Ultrasensitivity of Living Polymers

2002-07-20

arxiv.org/abs/cond-mat/0207498v4

Phys. Rev. Lett. v.90 118301 (2003)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.118301

Synthetic and biological living polymers are self-assembling chains whose chain length distributions (CLDs) are dynamic. We show these dynamics are ultrasensitive: even a small perturbation (e.g. temperature jump) non-linearly distorts the CLD, eliminating or massively augmenting short chains. The origin is fast relaxation of mass variables (mean chain length, monomer concentration) which perturbs CLD shape variables before these can relax via slow chain growth rate fluctuations. Viscosity relaxation predictions agree with experiments on the best-studied synthetic system, alpha-methylstyrene.

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