Structure and properties of ultra-high molecular weight bisphenol a polycarbonate synthesized by solid-state polymerization in amorphous microlayers

In Hak Baick, Woo Jic Yang, Yun Gyong Ahn, Kwang Ho Song, Kyu Yong Choi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The structure and properties of ultrahigh molecular weight polycarbonate synthesized by solid-state polymerization in micro-layers (SSPm) are reported. A low molecular weight prepolymer derived from the melt transesterification of bisphenol A and diphenyl carbonate as a starting material was polymerized to highly amorphous and transparent polycarbonate of molecular weight larger than 300,000 g mol-1 in the micro-layers of thickness from 50 nm to 20 μm. It was observed that when the polymerization time in micro-layers was extended beyond conventional reaction time, insoluble polymer fraction increased up to 95%. Through the analysis of both soluble and insoluble polymer fractions of the high molecular weight polycarbonate by 1H NMR spectroscopy and pyrolysis-gas chromatography mass spectrometry (Py-GC/MS), branches and partially crosslinked structures have been identified. The thermal, mechanical and rheological properties of the ultra-high molecular weight nonlinear polycarbonates synthesized in this study have been measured by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and rheometry. The nonlinear chain structures of the polymer have been found to affect the polymer's thermal stability, mechanical strength, shear thinning effect, and elastic properties.

Original languageEnglish
Article number41609
JournalJournal of Applied Polymer Science
Volume132
Issue number10
DOIs
Publication statusPublished - 2014 Jan 1

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polycarbonate
Polycarbonates
Molecular weight
Polymerization
Polymers
Shear thinning
Carbonates
Transesterification
Dynamic mechanical analysis
Gas chromatography
Nuclear magnetic resonance spectroscopy
Strength of materials
Mass spectrometry
Differential scanning calorimetry
Pyrolysis
Thermodynamic stability

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)

Cite this

Structure and properties of ultra-high molecular weight bisphenol a polycarbonate synthesized by solid-state polymerization in amorphous microlayers. / Baick, In Hak; Yang, Woo Jic; Ahn, Yun Gyong; Song, Kwang Ho; Choi, Kyu Yong.

In: Journal of Applied Polymer Science, Vol. 132, No. 10, 41609, 01.01.2014.

Research output: Contribution to journalArticle

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AU - Choi, Kyu Yong

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