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Self-assembled structures in d8-polystyreneblock- polyisoprene/polystyrene blends in the weak segregation regime: SAXS and TEM study
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SYSNO ASEP 0326760 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Self-assembled structures in d8-polystyreneblock- polyisoprene/polystyrene blends in the weak segregation regime: SAXS and TEM study Title Samouspořádané struktury ve směsích polystyren-blok- polyisopren/polystyren ve stadiu slabé segregace: Studie metodami SAXS a TEM Author(s) Holoubek, Jaroslav (UMCH-V) RID
Baldrian, Josef (UMCH-V)
Hromádková, Jiřina (UMCH-V) RID
Steinhart, Miloš (UMCH-V) RIDSource Title Polymer International. - : Wiley - ISSN 0959-8103
Roč. 58, č. 7 (2009), s. 762-774Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords diblock copolymers ; homopolymer/copolymer blends ; SAXS Subject RIV CD - Macromolecular Chemistry R&D Projects GA202/09/2078 GA ČR - Czech Science Foundation (CSF) GESON/06/E005 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000267728100007 DOI 10.1002/pi.2589 Annotation This paper reports an investigation of the microphase-separated morphology in blends of d-PS –PI with homo-PS in the weak segregation regime. The parameter rM = MH/MC (where MH and MC are the weight-average molecular weights of the homopolymer and corresponding block copolymer chain) was selected to encompass all possible types of mutual homopolymer/block copolymer sizes. The PS block chains behave as a wet brush for rM < 1 The domain spacing D increases systematically with increasing concentration of homopolymer wP and increasing rM regardless of the implemented specific morphology, but the slope of the periodicity D versus wP relation is smaller than in the intermediate and strong segregation regimes. The parameters rM and 3/2N (where is the Flory-Huggins parameter and N the number of segments per chain) characterize the slope of the D versus wP relation in the weak and intermediate segregation regimes. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2010
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