INFLUENCE OF LIClO[4] ADDITION ON STRUCTURE AND MISCIBILITY FEATURES
OF PEO-PPO-PEO BLOCK COPOLYMER AND ITS BLENDS WITH PMMA HOMOPOLYMER,
V.V.Shilov, Yu. P.Gomza, A.E.Nesterov, Institute of Macromolecular
Chemistry, Ukraine National Academy of Sciences, Kharkivske shausse,
48, 02160 Kyiv, Ukraine and M.V.Burmistr Ukrainian State
Chemical-Technological University, Pr. Gagarina, 8, Dnepropetrovsk,
49005, Ukraine
Solvent-free block copolymer/dissolved salt systems as well as blends
based on homopolymer, block copolymer and dissolved salt are not
studied up to now, in spite of importance of such systems both with
practical and fundamental point of view.
Here the results of thermal properties, structure and miscibility
behavior of PEO-PPO-PEO block copolymer, PEO-PPO-PEO/PMMA blends as
well as the corresponding LiClO[4] based solvent-free composite
polymer electrolytes carried out using different scanning calorimetry,
wide-angle X-ray scattering, small-angle X-ray scattering and optical
turbidity techniques are reported.
It was shown that the pure copolymer does not show any microphase
separation effects in the temperature range studied. The WAXS and
SAXS data reveal large structural changes induced by the salt. and as
a result of introduction of salt. The PEO-PPO-PEO/PMMA blends are
partially compatible and show LCST behavior. The increase of the PPO
content in the blockcopolymer leads to bimodal displacement in the
area of lower temperatures. Introduction of the salt promotes
increasing stability of a single-phase state of the blends.

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