Excluded Volume Effects and Stretched Polymer Chains
نویسنده
چکیده
The renormalized elasticity Jheory for jsolated flexible polymers developed recently by de Gennes is extended to the case of strong elongation ( Z / R F >> 1,Z is the average end-to-end length in response to a uniform tension and R F is the excluded volume Flory radius !fa free coil). I t is shown that, in this regime, the elastic restoring force f is nonlinear in the distortion and varies as Z3/’ in three dimensions. The consequences of this behavior are discussed for: (1) the coil-stretch transition in strong shear flows and (2) elastic neutron scattering.
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