Morphology and phase transitions in styrene-butadiene-styrene triblock copolymer grafted with polyhedral oligomeric silsesquioxanes

Daniel B. Drazkowski, Andre Lee

    Research output: ResearchConference contribution

    Abstract

    Symmetrie triblock copolymer of styrene-butadiene-styrene (SBS) was grafted with varying amounts of polyhedral oligomeric silsesquioxane (POSS) with different organic moieties. The POSS, R′R7Si8O 12, was designed to contain a single silane functional group, R', which was used to graft onto the dangling 1,2 butadienes in the midbutadiene block, while the other seven identical organic group, R7, interact with styrene end-blocks at different level. Morphology and phase transitions of these POSS-modified SBS triblock copolymers were investigated using time-resolved small angle X-ray scattering and rheological methods. It was observed for isobutyl moiety POSS (iBu-POSS), appears to show a high affinity to stay in the butadiene domain. While phenyl moiety POSS (Ph-POSS), due to its preference with styrene blocks, the driving force to reduce enthalpy comes at expense of the entropy to remain in butadiene domain, leading to a qualitative change at the interface of phase separated domains.

    LanguageEnglish (US)
    Title of host publication2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings
    Pages56-59
    Number of pages4
    Volume2
    StatePublished - 2007
    Event2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007 - Santa Clara, CA, United States
    Duration: May 20 2007May 24 2007

    Other

    Other2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007
    CountryUnited States
    CitySanta Clara, CA
    Period5/20/075/24/07

    Profile

    Butadiene
    Block copolymers
    Styrene
    Phase transitions
    X ray scattering
    Silanes
    Grafts
    Functional groups
    Enthalpy
    Entropy

    Keywords

    • Block copolymers
    • Order-disorder transition
    • Order-Order transition
    • POSS
    • SAXS

    ASJC Scopus subject areas

    • Mechanical Engineering

    Cite this

    Drazkowski, D. B., & Lee, A. (2007). Morphology and phase transitions in styrene-butadiene-styrene triblock copolymer grafted with polyhedral oligomeric silsesquioxanes. In 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings (Vol. 2, pp. 56-59)

    Morphology and phase transitions in styrene-butadiene-styrene triblock copolymer grafted with polyhedral oligomeric silsesquioxanes. / Drazkowski, Daniel B.; Lee, Andre.

    2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings. Vol. 2 2007. p. 56-59.

    Research output: ResearchConference contribution

    Drazkowski, DB & Lee, A 2007, Morphology and phase transitions in styrene-butadiene-styrene triblock copolymer grafted with polyhedral oligomeric silsesquioxanes. in 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings. vol. 2, pp. 56-59, 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Santa Clara, CA, United States, 5/20/07.
    Drazkowski DB, Lee A. Morphology and phase transitions in styrene-butadiene-styrene triblock copolymer grafted with polyhedral oligomeric silsesquioxanes. In 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings. Vol. 2. 2007. p. 56-59.
    Drazkowski, Daniel B. ; Lee, Andre. / Morphology and phase transitions in styrene-butadiene-styrene triblock copolymer grafted with polyhedral oligomeric silsesquioxanes. 2007 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2007, Technical Proceedings. Vol. 2 2007. pp. 56-59
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    abstract = "Symmetrie triblock copolymer of styrene-butadiene-styrene (SBS) was grafted with varying amounts of polyhedral oligomeric silsesquioxane (POSS) with different organic moieties. The POSS, R′R7Si8O 12, was designed to contain a single silane functional group, R', which was used to graft onto the dangling 1,2 butadienes in the midbutadiene block, while the other seven identical organic group, R7, interact with styrene end-blocks at different level. Morphology and phase transitions of these POSS-modified SBS triblock copolymers were investigated using time-resolved small angle X-ray scattering and rheological methods. It was observed for isobutyl moiety POSS (iBu-POSS), appears to show a high affinity to stay in the butadiene domain. While phenyl moiety POSS (Ph-POSS), due to its preference with styrene blocks, the driving force to reduce enthalpy comes at expense of the entropy to remain in butadiene domain, leading to a qualitative change at the interface of phase separated domains.",
    keywords = "Block copolymers, Order-disorder transition, Order-Order transition, POSS, SAXS",
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    N2 - Symmetrie triblock copolymer of styrene-butadiene-styrene (SBS) was grafted with varying amounts of polyhedral oligomeric silsesquioxane (POSS) with different organic moieties. The POSS, R′R7Si8O 12, was designed to contain a single silane functional group, R', which was used to graft onto the dangling 1,2 butadienes in the midbutadiene block, while the other seven identical organic group, R7, interact with styrene end-blocks at different level. Morphology and phase transitions of these POSS-modified SBS triblock copolymers were investigated using time-resolved small angle X-ray scattering and rheological methods. It was observed for isobutyl moiety POSS (iBu-POSS), appears to show a high affinity to stay in the butadiene domain. While phenyl moiety POSS (Ph-POSS), due to its preference with styrene blocks, the driving force to reduce enthalpy comes at expense of the entropy to remain in butadiene domain, leading to a qualitative change at the interface of phase separated domains.

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