Journal
PHYSICA B
Volume 297, Issue 1-4, Pages 50-54Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4526(00)00836-X
Keywords
neutron spin echo; polymer
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Poly(N-vinylcaprolactam) was studied by SANS and NSE around the coil-globule transition (T-C = 32 degreesC) at the threshold of overlapping of molecules in D2O-solution (C = 0.5 wt%, mass M = 1 x 10(6)). For T greater than or equal to T-C chain units' interaction grown by temperature increase makes coils collapsed. In the dynamics, an anomalous behaviour was observed: together with a slowing down of the diffusion as in the Rouse model, in the globular state the chains demonstrate fast stretched oscillations. (C) 2001 Elsevier Science B.V. All rights reserved.
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