Amorphous copolyesters based on bibenzoic acids and neopentyl glycol

Hans Eliot Edling, Ryan J. Mondschein, Mark K. Davis, Timothy Edward Long, Sam Richard Turner

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

High Tg amorphous copolyester thermoplastics were synthesized by incorporating 4,4′-bibenzoate (4,4′BB) and 3,4′-bibenzoate moieties into the polyester backbone via melt polycondensation. The high levels of crystallinity typically associated with 4,4′BB containing polyesters were suppressed through copolymerization of ethylene glycol, 1,4-cyclohexane dimethanol, and neopentyl glycol (NPG) diols. NPG was shown to be highly effective in suppressing crystallization and was used to produce amorphous compositions with Tg’s as high as 129 °C. Diol ratios were determined by 1H NMR spectroscopy and molecular weights were assessed with inherent viscosity (ηinh). Thermogravimetric analysis showed single-step weight losses in the range of 395–419 °C. Differential scanning calorimetry was used to determine melting points and glass transition temperatures over a wide range of copolyester compositions and identified amorphous compositions. Dynamic mechanical analysis confirmed Tg’s and was used to study β-relaxations below the Tg. Rheological analysis revealed the effect of NPG structures on shear thinning and thermal stability.

Original languageEnglish
JournalJournal of Polymer Science, Part A: Polymer Chemistry
DOIs
Publication statusAccepted/In press - 2018 Jan 1
Externally publishedYes

Fingerprint

Glycols
Polyesters
Acids
Chemical analysis
Ethylene Glycol
Shear thinning
Dynamic mechanical analysis
Polycondensation
Cyclohexane
Crystallization
Ethylene glycol
Copolymerization
Thermoplastics
Nuclear magnetic resonance spectroscopy
Melting point
Thermogravimetric analysis
Differential scanning calorimetry
Thermodynamic stability
Molecular weight
Viscosity

Keywords

  • amorphous
  • bibenzoate
  • calorimetry
  • cyclohexanedimethanol
  • neopentyl glycol
  • polyester
  • rheology

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Eliot Edling, H., Mondschein, R. J., Davis, M. K., Long, T. E., & Richard Turner, S. (Accepted/In press). Amorphous copolyesters based on bibenzoic acids and neopentyl glycol. Journal of Polymer Science, Part A: Polymer Chemistry. https://doi.org/10.1002/pola.29296

Amorphous copolyesters based on bibenzoic acids and neopentyl glycol. / Eliot Edling, Hans; Mondschein, Ryan J.; Davis, Mark K.; Long, Timothy Edward; Richard Turner, Sam.

In: Journal of Polymer Science, Part A: Polymer Chemistry, 01.01.2018.

Research output: Contribution to journalArticle

Eliot Edling, Hans ; Mondschein, Ryan J. ; Davis, Mark K. ; Long, Timothy Edward ; Richard Turner, Sam. / Amorphous copolyesters based on bibenzoic acids and neopentyl glycol. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2018.
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