skip to main content
Idioma:

Morphological investigation of polydisperse asymmetric block copolymer systems of poly(styrene) and poly(methacrylic acid) in the strong segregation regime

Asad Ayoubi, Mehran ; Zhu, Kaizheng ; Nyström, Bo ; Olsson, Ulf ; Almdal, Kristoffer ; Khokhlov, Alexei R. ; Piculell, Lennart

Journal of polymer science. Part B, Polymer physics, 2013-12, Vol.51 (23), p.1657-1671 [Periódico revisado por pares]

Hoboken, NJ: Blackwell Publishing Ltd

Texto completo disponível

Citações Citado por
  • Título:
    Morphological investigation of polydisperse asymmetric block copolymer systems of poly(styrene) and poly(methacrylic acid) in the strong segregation regime
  • Autor: Asad Ayoubi, Mehran ; Zhu, Kaizheng ; Nyström, Bo ; Olsson, Ulf ; Almdal, Kristoffer ; Khokhlov, Alexei R. ; Piculell, Lennart
  • Assuntos: Asymmetry ; block copolymers ; block polydispersity ; Chemical Sciences ; Fysikalisk kemi ; Kemi ; microdomain morphology ; microphase separation ; Natural Sciences ; Naturvetenskap ; Physical Chemistry ; rheology ; rheology, self-assembly; WAXS ; SAXS ; self-assembly ; WAXS
  • É parte de: Journal of polymer science. Part B, Polymer physics, 2013-12, Vol.51 (23), p.1657-1671
  • Notas: ark:/67375/WNG-469WJ974-L
    istex:601A682447275B03EBDD4D81E0F439FBA301FB40
    ArticleID:POLB23389
    Swedish Research Council (VR) through the Linnaeus grant for the Organizing Molecular Matter (OMM) Center of Excellence - No. 239-2009-6794
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: ABSTRACT Samples of compositionally (highly) asymmetric diblock copolymers and, also, mixtures of diblock and triblock copolymers (the latter obtained as end‐coupling products of two diblock molecules of the mixture), composed of (a) monodisperse majority block(s) of poly(styrene) (PS) and a polydisperse minority block of poly(methacrylic acid) (PMAA), microphase separate into spherical PMAA microdomains, either in disordered liquid‐like state or body‐centered‐cubic (BCC) arrangement, at various annealing temperatures T, in the strong segregation regime SSR. We found that (i) the microphase separated state is favored over an anticipated molecularly homogenous state, (ii) the spherical microdomain morphology (with BCC symmetry) is favored over an anticipated hexagonally packed cylindrical morphology, (iii) the extent of the dissolution of short PMAA blocks in the PS material can be quantified, (iv) the spherical microdomains are dilated, and (v) despite molecular‐weight (and architectural) polydispersity, well‐ordered BCC structures can be obtained. © 2013 Wiley Periodicals, Inc. J. Polym. Sci. Part B: Polym. Phys. 2013, 51, 1657–1671 Study of the self‐assembly characteristics of block copolymer systems featuring block polydispersity is a current research topic, as historically the focus has only been on those of the systems consisting of monodisperse blocks. Here, the effects of block polydispersity on compositionally highly asymmetric block copolymers of poly(styrene) and poly(methacrylic acid) in the strong segregation regime are investigated. In particular, the effects of block polydispersity on spherical microdomain size, the dissolution of the short blocks of one block into the other, and the possibility of obtaining spherical microdomains that are highly liquid crystalline are explored.
  • Editor: Hoboken, NJ: Blackwell Publishing Ltd
  • Idioma: Inglês;Russo
Links
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  4 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.