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The influence of the morphology on the dynamics in ordered diblock copolymer melts
Author(s) -
Papadakis Christine M.,
Almdal Kristoffer,
Mortensen Kell,
Rittig Frank,
Štěpánek Petr
Publication year - 2000
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200012)162:1<275::aid-masy275>3.0.co;2-m
Subject(s) - copolymer , materials science , dynamic light scattering , hexagonal crystal system , micelle , scattering , light scattering , phase (matter) , morphology (biology) , chemical physics , polymer chemistry , crystallography , polymer , optics , nanotechnology , chemistry , composite material , nanoparticle , physics , organic chemistry , aqueous solution , biology , genetics
We report on polarized and depolarized dynamic light scattering (DLS) measurements on two asymmetric poly(ethylene‐ alt ‐propylene‐ block ‐dimethylsiloxane) (PEP‐PDMS) diblock copolymers in bulk. Apart from the disordered phase, the samples form various ordered morphologies below their respective order‐to‐disorder transition temperatures: One of the samples forms the hexagonal structure composed of PEP cylinders in a PDMS matrix, whereas the other one forms three ordered structures as a function of temperature, among them two cubic micellar structures and a non‐cubic structure. We report here on the dynamic processes found in polarized DLS measurements in the disordered, hexagonal, cubic micellar and non‐cubic structure in the same material.