Synthesis of Polysulfone-Containing Poly(butylene terephthalate) Segmented Block Copolymers: Influence of Segment Length on Thermomechanical Performance

Joseph M. Dennis; Gregory B. Fahs; Nicholas G. Moon; Ryan J. Mondschein; Robert B. Moore; Garth L. Wilkes; Timothy E. Long

doi:10.1021/acs.macromol.7b00557

Synthesis of Polysulfone-Containing Poly(butylene terephthalate) Segmented Block Copolymers: Influence of Segment Length on Thermomechanical Performance

Joseph M. Dennis, Gregory B. Fahs, Nicholas G. Moon, Ryan J. Mondschein, Robert B. Moore, Garth L. Wilkes, Timothy E. Long

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

8 Scopus citations

Abstract

A facile synthesis of hydroxyethyl-functionalized poly(ether sulfone) (PESu) oligomers permitted subsequent melt transesterification into segmented block copolymers with poly(butylene terephthalate). The unique solubility of the PESu oligomers in the melt with 1,4-butanediol and dimethyl terephthalate enabled a systematic study of segment length on thermomechanical properties of the resulting block copolymers. ¹H NMR spectroscopy revealed a compositional dependence on the average segment length of the PBT. Additionally, the concert of NMR spectroscopy, DSC, and DMA highlighted critical segment lengths for crystallization and phase separation. In agreement with a relatively constant T_m and phase separation observed with DSC and DMA, respectively, small-angle X-ray scattering identified a compositionally independent lamellar thickness, while the amorphous layer thickness increased with PESu incorporation. As a result, the complementary analytical techniques provided an understanding of the morphological influence on the thermomechanical behavior of an unprecedented family of high-T_g, semicrystalline, segmented block copolymers.

Original language	English (US)
Pages (from-to)	5107-5113
Number of pages	7
Journal	Macromolecules
Volume	50
Issue number	13
DOIs	https://doi.org/10.1021/acs.macromol.7b00557
State	Published - Jul 11 2017
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/acs.macromol.7b00557

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title = "Synthesis of Polysulfone-Containing Poly(butylene terephthalate) Segmented Block Copolymers: Influence of Segment Length on Thermomechanical Performance",

abstract = "A facile synthesis of hydroxyethyl-functionalized poly(ether sulfone) (PESu) oligomers permitted subsequent melt transesterification into segmented block copolymers with poly(butylene terephthalate). The unique solubility of the PESu oligomers in the melt with 1,4-butanediol and dimethyl terephthalate enabled a systematic study of segment length on thermomechanical properties of the resulting block copolymers. 1H NMR spectroscopy revealed a compositional dependence on the average segment length of the PBT. Additionally, the concert of NMR spectroscopy, DSC, and DMA highlighted critical segment lengths for crystallization and phase separation. In agreement with a relatively constant Tm and phase separation observed with DSC and DMA, respectively, small-angle X-ray scattering identified a compositionally independent lamellar thickness, while the amorphous layer thickness increased with PESu incorporation. As a result, the complementary analytical techniques provided an understanding of the morphological influence on the thermomechanical behavior of an unprecedented family of high-Tg, semicrystalline, segmented block copolymers.",

author = "Dennis, {Joseph M.} and Fahs, {Gregory B.} and Moon, {Nicholas G.} and Mondschein, {Ryan J.} and Moore, {Robert B.} and Wilkes, {Garth L.} and Long, {Timothy E.}",

note = "Funding Information: The authors acknowledge Arnold Schneller and Axel Wilms at BASF for insightful discussions. This material is partially based upon work supported by the National Science Foundation under Grants DMR-1507245 and DMR-0923107. Publisher Copyright: {\textcopyright} 2017 American Chemical Society. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2017",

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doi = "10.1021/acs.macromol.7b00557",

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T2 - Influence of Segment Length on Thermomechanical Performance

AU - Dennis, Joseph M.

AU - Fahs, Gregory B.

AU - Moon, Nicholas G.

AU - Mondschein, Ryan J.

AU - Moore, Robert B.

AU - Wilkes, Garth L.

AU - Long, Timothy E.

N1 - Funding Information: The authors acknowledge Arnold Schneller and Axel Wilms at BASF for insightful discussions. This material is partially based upon work supported by the National Science Foundation under Grants DMR-1507245 and DMR-0923107. Publisher Copyright: © 2017 American Chemical Society. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2017/7/11

Y1 - 2017/7/11

N2 - A facile synthesis of hydroxyethyl-functionalized poly(ether sulfone) (PESu) oligomers permitted subsequent melt transesterification into segmented block copolymers with poly(butylene terephthalate). The unique solubility of the PESu oligomers in the melt with 1,4-butanediol and dimethyl terephthalate enabled a systematic study of segment length on thermomechanical properties of the resulting block copolymers. 1H NMR spectroscopy revealed a compositional dependence on the average segment length of the PBT. Additionally, the concert of NMR spectroscopy, DSC, and DMA highlighted critical segment lengths for crystallization and phase separation. In agreement with a relatively constant Tm and phase separation observed with DSC and DMA, respectively, small-angle X-ray scattering identified a compositionally independent lamellar thickness, while the amorphous layer thickness increased with PESu incorporation. As a result, the complementary analytical techniques provided an understanding of the morphological influence on the thermomechanical behavior of an unprecedented family of high-Tg, semicrystalline, segmented block copolymers.

AB - A facile synthesis of hydroxyethyl-functionalized poly(ether sulfone) (PESu) oligomers permitted subsequent melt transesterification into segmented block copolymers with poly(butylene terephthalate). The unique solubility of the PESu oligomers in the melt with 1,4-butanediol and dimethyl terephthalate enabled a systematic study of segment length on thermomechanical properties of the resulting block copolymers. 1H NMR spectroscopy revealed a compositional dependence on the average segment length of the PBT. Additionally, the concert of NMR spectroscopy, DSC, and DMA highlighted critical segment lengths for crystallization and phase separation. In agreement with a relatively constant Tm and phase separation observed with DSC and DMA, respectively, small-angle X-ray scattering identified a compositionally independent lamellar thickness, while the amorphous layer thickness increased with PESu incorporation. As a result, the complementary analytical techniques provided an understanding of the morphological influence on the thermomechanical behavior of an unprecedented family of high-Tg, semicrystalline, segmented block copolymers.

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Synthesis of Polysulfone-Containing Poly(butylene terephthalate) Segmented Block Copolymers: Influence of Segment Length on Thermomechanical Performance

Abstract

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