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 Edward Long

Research output: Contribution to journalArticle

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)5107-5113
Number of pages7
JournalMacromolecules
Volume50
Issue number13
DOIs
Publication statusPublished - 2017 Jul 11
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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