Self-assembly and competitive hydrogen bonding interactions of double crystalline diblock copolymer/homopolymer blends

Salim, N.V., Guo, Q. and Hanley, T.L. 2011, Self-assembly and competitive hydrogen bonding interactions of double crystalline diblock copolymer/homopolymer blends, in ISACS6 2011 : Proceedings of the International Symposia on Advancing the Chemical Sciences : Challenges in Organic Materials and Supramolecular Chemistry, Royal Society of Chemistry, [Beijing, China], pp. 1-1.

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Title Self-assembly and competitive hydrogen bonding interactions of double crystalline diblock copolymer/homopolymer blends
Author(s) Salim, N.V.
Guo, Q.
Hanley, T.L.
Conference name International Symposia on Advancing the Chemical Sciences (2011 : Beijing, China)
Conference location Beijing, China
Conference dates 2-5 Sep. 2011
Title of proceedings ISACS6 2011 : Proceedings of the International Symposia on Advancing the Chemical Sciences : Challenges in Organic Materials and Supramolecular Chemistry
Editor(s) [Unknown]
Publication date 2011
Conference series International Symposia on Advancing the Chemical Sciences
Start page 1
End page 1
Publisher Royal Society of Chemistry
Place of publication [Beijing, China]
Keyword(s) nanostructure
polymer
self-assembly
Summary In the present work, nanostructured blends were prepared from double crystalline diblock copolymer poly(ɛ-caprolactone)-block-poly(ethylene oxide) and homopolymer 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 homogeneous phase at 60 wt % PVPh and above blends. 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 microphase 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.
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:30042293

Document type: Conference Paper
Collections: Centre for Material and Fibre Innovation
Institute for Frontier Materials
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