Response to "Comment on 'Unified explanation of the anomalous dynamic properties of highly asymmetric polymer blends' " [J. Chem. Phys. 138, 197101 (2013)].

作者: K. L. Ngai , S. Capaccioli

DOI: 10.1063/1.4804625

关键词: Neutron diffractionThermodynamicsNeutron scatteringChain (algebraic topology)Momentum transferComputational chemistryPhysicsPolymer blendMethyl methacrylateNeutron

摘要: The Comment of Colmenero asserts no change in Fs(Q,t) the poly(ethylene oxide) (PEO) chains blends with poly(methyl methacrylate) on crossing times about 1–2 ns data obtained by neutron scattering experiments and simulations. assertion is opposite to that reported original papers where simulations were published. To make this point clear, we cite very statements made concluding indeed time interval from 60 ps dynamics PEO chain follows approximately Rouse model, but becomes slower departs model dependencies time, momentum transfer, temperature at longer past tc = ns. It noteworthy similar crossover entangled homopolymers scale was found scattering.

参考文章(7)
Martin Brodeck, Fernando Alvarez, Angel J. Moreno, Juan Colmenero, Dieter Richter, Chain Motion in Nonentangled Dynamically Asymmetric Polymer Blends: Comparison between Atomistic Simulations of PEO/PMMA and a Generic Bead−Spring Model Macromolecules. ,vol. 43, pp. 3036- 3051 ,(2010) , 10.1021/MA902820A
K. Niedzwiedz, A. Wischnewski, M. Monkenbusch, D. Richter, A.-C. Genix, A. Arbe, J. Colmenero, M. Strauch, E. Straube, Polymer chain dynamics in a random environment: heterogeneous mobilities. Physical Review Letters. ,vol. 98, pp. 168301- ,(2007) , 10.1103/PHYSREVLETT.98.168301
Silvia Arrese-Igor, Angel Alegría, Angel J. Moreno, Juan Colmenero, Anomalous molecular weight dependence of chain dynamics in unentangled polymer blends with strong dynamic asymmetry Soft Matter. ,vol. 8, pp. 3739- 3742 ,(2012) , 10.1039/C2SM07451F
M. Zamponi, A. Wischnewski, M. Monkenbusch, L. Willner, D. Richter, P. Falus, B. Farago, M. G. Guenza, Cooperative dynamics in homopolymer melts: a comparison of theoretical predictions with neutron spin echo experiments. Journal of Physical Chemistry B. ,vol. 112, pp. 16220- 16229 ,(2008) , 10.1021/JP807035Z
D. Richter, B. Ewen, B. Farago, T. Wagner, Microscopic dynamics and topological constraints in polymer melts: A neutron-spin-echo study. Physical Review Letters. ,vol. 62, pp. 2140- 2143 ,(1989) , 10.1103/PHYSREVLETT.62.2140
K. L. Ngai, S. Capaccioli, Unified explanation of the anomalous dynamic properties of highly asymmetric polymer blends The Journal of Chemical Physics. ,vol. 138, pp. 054903- 054903 ,(2013) , 10.1063/1.4789585