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Park, Lee Soon
School of Materials Science and Engineering
Research Interests
  • Flexible OLED new materials, process and fabrication
  • Touch Screen Panel(TSP) new materials and process new materials and process
  • Nano-materials synthesis and application (Ag nano-wire and metal mesh electrode)

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SYNTHESIS OF COPOLY(ETHYLENE TEREPHTHALATE/IMIDE)S AND CRYSTALLIZATION KINETICS

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Title
SYNTHESIS OF COPOLY(ETHYLENE TEREPHTHALATE/IMIDE)S AND CRYSTALLIZATION KINETICS
Author
Park, Lee SoonLee, Dong Chan
Keywords
Activation energy; Antimony compounds; Catalysts; Crystallization; Monomers; Polycondensation; Polyethylene terephthalates; Polyimides; Reaction kinetics; Synthesis (chemical)
Issue Date
1995-10
Publisher
WILEY-BLACKWELL
Citation
POLYMER ENGINEERING AND SCIENCE, v.35, no.20, pp.1629 - 1635
Abstract
Copoly(ethylene terephthalate/imide)s (PETI) were prepared by melt polycondensation of bis(2-hydroxyethyl)terephthalate (BHET) and imide containing comonomer, 4,4'-bis[(4-carbo-2-hydroxyethoxy)phthalimido]diphenylmethane (BHEI) with Sb2O3 as catalyst at 280 degrees C under vacuum (-1 mm Hg). The change of T-m with an increase of the BHEI repeat unit in the PETI copolymer was analyzed by the Flory equation. On isothermal crystallization, a longer induction time and a lower activation energy than for the PET homopolymer were observed with an increasing amount of the BHEI repeat unit. The Avrami exponent, n, increased from 1.5 to 2.3 as the content of BHEI or crystallization temperature was increased. The Avrami rate constant K decreased with the increase of the BHEI unit. On nonisothermal crystallization, the Ozawa equation and Lawton plot were used to investigate the effect of BHEI units on the crystallization kinetics of PETI copolymers. From the change of the cooling crystallization function and the result of the Lawton plot, it was found that the BHEI unit effectively decreases the rate of crystallization
URI
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DOI
10.1002/pen.760352009
ISSN
0032-3888
Appears in Collections:
MSE_Journal Papers
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