Microphase separation in double crystalline poly (ethylene oxide)-block-poly (caprolactone)/poly (4-vinyl phenol) blends

Salim, Nisa V., Hanley, Tracey and Guo, Qipeng 2011, Microphase separation in double crystalline poly (ethylene oxide)-block-poly (caprolactone)/poly (4-vinyl phenol) blends, in SCM-5 2011 : 5th International Symposium on the Separation and Characterization of Natural and Synthetic Macromolecules : Book of abstracts, [Unibook], [Amsterdam, The Netherlands], pp. 35-35.

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Title Microphase separation in double crystalline poly (ethylene oxide)-block-poly (caprolactone)/poly (4-vinyl phenol) blends
Author(s) Salim, Nisa V.
Hanley, Tracey
Guo, Qipeng
Conference name Separation and Characterization of Natural and Synthetic Macromolecules. Symposium (5th : 2011 : Amsterdam, The Netherlands)
Conference location Amsterdam, The Netherlands
Conference dates 26-28 Jan. 2011
Title of proceedings SCM-5 2011 : 5th International Symposium on the Separation and Characterization of Natural and Synthetic Macromolecules : Book of abstracts
Editor(s) Aalbers, Tom
Verschuren, Peter
Publication date 2011
Conference series Separation and Characterization of Natural and Synthetic Macromolecules. Symposium
Start page 35
End page 35
Publisher [Unibook]
Place of publication [Amsterdam, The Netherlands]
Keyword(s) hydrogen bonding
microphase separation
intermolecular interactions
Summary We report microphase separation induced by competitive hydrogen bonding interactions in double crystalline diblock copolymer/homopolymer blends of poly(ethylene oxide)-block-poly(ɛ-caprolactone) (PEO-b-PCL) and poly(4-vinyl phenol) (PVPh). The diblock copolymer PEO-b-PCL consists of two immiscible crystallizable blocks wherein both PEO and PCL blocks can form hydrogen bonds with PVPh. In these A-b-B/C diblock copolymer/homopolymer blends, microphase separation takes place due to the disparity in intermolecular interactions; specifically PVPh and PEO block interact strongly whereas PVPh and PCL block interact weakly. The TEM and SAXS results show that the cubic PEO-b-PCL diblock copolymer changes into ordered hexagonal cylindrical morphology upon addition of 20 wt % PVPh followed by disordered bicontinuous phase in the blend with 40 wt % PVPh and then to homogenous phase at 60 wt% PVPh and above. Up to 40 wt % PVPh there is only weak interaction between PVPh and PCL due to the selective hydrogen bonding between PVPh and PEO. However, with higher PVPh concentration, the blends become homogeneous since a sufficient amount of PVPh is available to form hydrogen bonds with both PEO and PCL. A structural model was proposed to explain the self-assembly and morphology of these blends based on the experimental results obtained. The formation of nanostructures and changes in morphologies depend on the relative strength of hydrogen bonding interaction between each block of the block copolymer and the homopolymer (1-3).
ISBN 9781616279431
1616279435
Language eng
Field of Research 091209 Polymers and Plastics
Socio Economic Objective 870303 Polymeric Materials (e.g. Paints)
HERDC Research category E3 Extract of paper
Persistent URL http://hdl.handle.net/10536/DRO/DU:30042289

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