Hoffmann S, Willner L, Richter D, Arbe A, Colmenero J, Farago B
Institut fur Festkorperforschung, Forschungszentrum Julich, 52425 Julich, Germany and Institut Laue-Langevin, 156X, 38042 Grenoble CEDEX, France.
Phys Rev Lett. 2000 Jul 24;85(4):772-5. doi: 10.1103/PhysRevLett.85.772.
In order to investigate the origin of the often invoked nanoheterogeneities in miscible polymer blends, we have performed quasielastic neutron scattering experiments on the component dynamics within the miscible polymer blend polyisoprene/polyvinyl ether including the pure components as a reference. We find that the apparent local heterogeneities observed by spectroscopic techniques originate from the chain specific crossover properties between entropy driven and local chain dynamics and are, thus, a purely dynamical phenomenon.
为了研究在互溶聚合物共混物中经常被提及的纳米级不均匀性的起源，我们对互溶聚合物共混物聚异戊二烯/聚乙烯基醚（包括纯组分作为参考）中的组分动力学进行了准弹性中子散射实验。我们发现，通过光谱技术观察到的明显局部不均匀性源于熵驱动和局部链动力学之间的链特异性交叉特性，因此是一种纯粹的动力学现象。
