A highly regular hexagonally perforated lamellar structure in a quiescent diblock copolymer

Yueh Lin Loo; Richard Alan Register; Douglas H. Adamson; Anthony J. Ryan

doi:10.1021/ma050237l

A highly regular hexagonally perforated lamellar structure in a quiescent diblock copolymer

Yueh Lin Loo, Richard Alan Register, Douglas H. Adamson, Anthony J. Ryan

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54 Scopus citations

Abstract

The highly regular hexagonally perforated lamellar (HPL) structure, which is metastable with respect to the gyroid (G) phase in quiescent diblock copolymers, was investigated. The two polystyrene-poly(ethylene-alt-propylene) S/EP were synthesized by sequential anionic polymerization of styrene and then isoprene, and the polysisoprene block selectively hydrogenated to EP. It was observed that anionically polymerized block copolymers showed compositional polydispersity between chains, which in principle permits equilibrium coexistence of ordered phases. The results show that quenching S/EP 9/14 from the G phase at 290 and 230°C did not produce any signature of the HPL structure even after 7 h.

Original language	English (US)
Pages (from-to)	4947-4949
Number of pages	3
Journal	Macromolecules
Volume	38
Issue number	11
DOIs	https://doi.org/10.1021/ma050237l
State	Published - May 31 2005

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma050237l

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title = "A highly regular hexagonally perforated lamellar structure in a quiescent diblock copolymer",

abstract = "The highly regular hexagonally perforated lamellar (HPL) structure, which is metastable with respect to the gyroid (G) phase in quiescent diblock copolymers, was investigated. The two polystyrene-poly(ethylene-alt-propylene) S/EP were synthesized by sequential anionic polymerization of styrene and then isoprene, and the polysisoprene block selectively hydrogenated to EP. It was observed that anionically polymerized block copolymers showed compositional polydispersity between chains, which in principle permits equilibrium coexistence of ordered phases. The results show that quenching S/EP 9/14 from the G phase at 290 and 230°C did not produce any signature of the HPL structure even after 7 h.",

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T1 - A highly regular hexagonally perforated lamellar structure in a quiescent diblock copolymer

AU - Loo, Yueh Lin

AU - Register, Richard Alan

AU - Adamson, Douglas H.

AU - Ryan, Anthony J.

PY - 2005/5/31

Y1 - 2005/5/31

N2 - The highly regular hexagonally perforated lamellar (HPL) structure, which is metastable with respect to the gyroid (G) phase in quiescent diblock copolymers, was investigated. The two polystyrene-poly(ethylene-alt-propylene) S/EP were synthesized by sequential anionic polymerization of styrene and then isoprene, and the polysisoprene block selectively hydrogenated to EP. It was observed that anionically polymerized block copolymers showed compositional polydispersity between chains, which in principle permits equilibrium coexistence of ordered phases. The results show that quenching S/EP 9/14 from the G phase at 290 and 230°C did not produce any signature of the HPL structure even after 7 h.

AB - The highly regular hexagonally perforated lamellar (HPL) structure, which is metastable with respect to the gyroid (G) phase in quiescent diblock copolymers, was investigated. The two polystyrene-poly(ethylene-alt-propylene) S/EP were synthesized by sequential anionic polymerization of styrene and then isoprene, and the polysisoprene block selectively hydrogenated to EP. It was observed that anionically polymerized block copolymers showed compositional polydispersity between chains, which in principle permits equilibrium coexistence of ordered phases. The results show that quenching S/EP 9/14 from the G phase at 290 and 230°C did not produce any signature of the HPL structure even after 7 h.

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A highly regular hexagonally perforated lamellar structure in a quiescent diblock copolymer

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