Synthesis and SANS characterization of poly(vinyl methyl ether)-block-polystyrene

Takahiro Hashimoto; Hirokazu Hasegawa; Takeji Hashimoto; Hiroshi Katayama; Masami Kamigaito; Mitsuo Sawamoto; Masayuki Imai

Synthesis and SANS characterization of poly(vinyl methyl ether)-block-polystyrene

Takahiro Hashimoto, Hirokazu Hasegawa, Takeji Hashimoto, Hiroshi Katayama, Masami Kamigaito, Mitsuo Sawamoto, Masayuki Imai

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

A solid technique to synthesize genuine diblock copolymers of poly(vinyl methyl ether) (PVME) and polystyrene (PS) for the phase behavior study was developed by the coupling reaction between end-chlorinated PVME and living PS anions. The phase behavior of the block copolymer with deuterium-labeled PS (PVME-b-DPS) was investigated by the small-angle neutron scattering (SANS) technique. The existence of a single broad peak in the SANS profile strongly suggested the formation of PVME-b-DPS block copolymer. Although the block copolymer was totally in the disordered state within the temperature range between 34 and 206°C, an increase in the scattering intensity with temperature implying an increase in the amplitude of thermal concentration fluctuation was clearly observed, as expected from the LCST-type phase behavior of PVME/PS blends.

Original language	English
Pages (from-to)	6819-6825
Number of pages	7
Journal	Macromolecules
Volume	30
Issue number	22
Publication status	Published - 1997 Nov 3
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

Cite this

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title = "Synthesis and SANS characterization of poly(vinyl methyl ether)-block-polystyrene",

abstract = "A solid technique to synthesize genuine diblock copolymers of poly(vinyl methyl ether) (PVME) and polystyrene (PS) for the phase behavior study was developed by the coupling reaction between end-chlorinated PVME and living PS anions. The phase behavior of the block copolymer with deuterium-labeled PS (PVME-b-DPS) was investigated by the small-angle neutron scattering (SANS) technique. The existence of a single broad peak in the SANS profile strongly suggested the formation of PVME-b-DPS block copolymer. Although the block copolymer was totally in the disordered state within the temperature range between 34 and 206°C, an increase in the scattering intensity with temperature implying an increase in the amplitude of thermal concentration fluctuation was clearly observed, as expected from the LCST-type phase behavior of PVME/PS blends.",

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T1 - Synthesis and SANS characterization of poly(vinyl methyl ether)-block-polystyrene

AU - Hashimoto, Takahiro

AU - Hasegawa, Hirokazu

AU - Hashimoto, Takeji

AU - Katayama, Hiroshi

AU - Kamigaito, Masami

AU - Sawamoto, Mitsuo

AU - Imai, Masayuki

PY - 1997/11/3

Y1 - 1997/11/3

N2 - A solid technique to synthesize genuine diblock copolymers of poly(vinyl methyl ether) (PVME) and polystyrene (PS) for the phase behavior study was developed by the coupling reaction between end-chlorinated PVME and living PS anions. The phase behavior of the block copolymer with deuterium-labeled PS (PVME-b-DPS) was investigated by the small-angle neutron scattering (SANS) technique. The existence of a single broad peak in the SANS profile strongly suggested the formation of PVME-b-DPS block copolymer. Although the block copolymer was totally in the disordered state within the temperature range between 34 and 206°C, an increase in the scattering intensity with temperature implying an increase in the amplitude of thermal concentration fluctuation was clearly observed, as expected from the LCST-type phase behavior of PVME/PS blends.

AB - A solid technique to synthesize genuine diblock copolymers of poly(vinyl methyl ether) (PVME) and polystyrene (PS) for the phase behavior study was developed by the coupling reaction between end-chlorinated PVME and living PS anions. The phase behavior of the block copolymer with deuterium-labeled PS (PVME-b-DPS) was investigated by the small-angle neutron scattering (SANS) technique. The existence of a single broad peak in the SANS profile strongly suggested the formation of PVME-b-DPS block copolymer. Although the block copolymer was totally in the disordered state within the temperature range between 34 and 206°C, an increase in the scattering intensity with temperature implying an increase in the amplitude of thermal concentration fluctuation was clearly observed, as expected from the LCST-type phase behavior of PVME/PS blends.

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Synthesis and SANS characterization of poly(vinyl methyl ether)-block-polystyrene

Abstract

ASJC Scopus subject areas

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