Properties of crosslinked polyurethanes synthesized from 4,4′-diphenylmethane diisocyanate and polyester polyol

H. C. Jung; S. J. Kang; W. N. Kim; Y. B. Lee; K. H. Choe; S. H. Hong; S. B. Kim

doi:10.1002/1097-4628(20001017)78:3<624::AID-APP180>3.0.CO;2-O

Properties of crosslinked polyurethanes synthesized from 4,4′-diphenylmethane diisocyanate and polyester polyol

H. C. Jung^*
, S. J. Kang
, W. N. Kim
, Y. B. Lee
, K. H. Choe
, S. H. Hong
, S. B. Kim

^*Corresponding author for this work

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

39 Citations (Scopus)

Abstract

Polyurethanes were synthesized using the high functional 4,4′-diphenyl-methane diisocyanate (MDI), polyester polyol, and 1,4-butane diol. The synthesized polyurethanes were analyzed using differential scanning calorimeter (DSC), dynamic mechanical thermal analysis (DMTA), Fourier transform infrared (FTIR) spectrometer, and swelling measurement using N,N′-dimethylformamide. From the result of thermal analysis by DSC and DMTA, single T_gs were observed in the polyurethane samples at all the formulated compositions. From this result, it is suggested that the polyurethanes synthesized in this study have crosslinked structure rather than the phase-separated segmented structure because of the high functionality (f = 2.9) of the MDI. By annealing the polyurethane samples using DSC, the T_gs were increased by 4.7-16.0°C at the various annealing temperatures. From the results of FTIR and swelling measurement of polyurethanes, it is suggested that the increase of T_g of the polyurethanes by annealing is not due to increase of the hydrogen bond strength but mainly due to the increase of the crosslink density.

Original language	English
Pages (from-to)	624-630
Number of pages	7
Journal	Journal of Applied Polymer Science
Volume	78
Issue number	3
DOIs	https://doi.org/10.1002/1097-4628(20001017)78:3<624::AID-APP180>3.0.CO;2-O
Publication status	Published - 2000 Oct

ASJC Scopus subject areas

General Chemistry
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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10.1002/1097-4628(20001017)78:3<624::AID-APP180>3.0.CO;2-O

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title = "Properties of crosslinked polyurethanes synthesized from 4,4′-diphenylmethane diisocyanate and polyester polyol",

abstract = "Polyurethanes were synthesized using the high functional 4,4′-diphenyl-methane diisocyanate (MDI), polyester polyol, and 1,4-butane diol. The synthesized polyurethanes were analyzed using differential scanning calorimeter (DSC), dynamic mechanical thermal analysis (DMTA), Fourier transform infrared (FTIR) spectrometer, and swelling measurement using N,N′-dimethylformamide. From the result of thermal analysis by DSC and DMTA, single Tgs were observed in the polyurethane samples at all the formulated compositions. From this result, it is suggested that the polyurethanes synthesized in this study have crosslinked structure rather than the phase-separated segmented structure because of the high functionality (f = 2.9) of the MDI. By annealing the polyurethane samples using DSC, the Tgs were increased by 4.7-16.0°C at the various annealing temperatures. From the results of FTIR and swelling measurement of polyurethanes, it is suggested that the increase of Tg of the polyurethanes by annealing is not due to increase of the hydrogen bond strength but mainly due to the increase of the crosslink density.",

author = "Jung, \{H. C.\} and Kang, \{S. J.\} and Kim, \{W. N.\} and Lee, \{Y. B.\} and Choe, \{K. H.\} and Hong, \{S. H.\} and Kim, \{S. B.\}",

year = "2000",

month = oct,

doi = "10.1002/1097-4628(20001017)78:3<624::AID-APP180>3.0.CO;2-O",

language = "English",

volume = "78",

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T1 - Properties of crosslinked polyurethanes synthesized from 4,4′-diphenylmethane diisocyanate and polyester polyol

AU - Jung, H. C.

AU - Kang, S. J.

AU - Kim, W. N.

AU - Lee, Y. B.

AU - Choe, K. H.

AU - Hong, S. H.

AU - Kim, S. B.

PY - 2000/10

Y1 - 2000/10

N2 - Polyurethanes were synthesized using the high functional 4,4′-diphenyl-methane diisocyanate (MDI), polyester polyol, and 1,4-butane diol. The synthesized polyurethanes were analyzed using differential scanning calorimeter (DSC), dynamic mechanical thermal analysis (DMTA), Fourier transform infrared (FTIR) spectrometer, and swelling measurement using N,N′-dimethylformamide. From the result of thermal analysis by DSC and DMTA, single Tgs were observed in the polyurethane samples at all the formulated compositions. From this result, it is suggested that the polyurethanes synthesized in this study have crosslinked structure rather than the phase-separated segmented structure because of the high functionality (f = 2.9) of the MDI. By annealing the polyurethane samples using DSC, the Tgs were increased by 4.7-16.0°C at the various annealing temperatures. From the results of FTIR and swelling measurement of polyurethanes, it is suggested that the increase of Tg of the polyurethanes by annealing is not due to increase of the hydrogen bond strength but mainly due to the increase of the crosslink density.

AB - Polyurethanes were synthesized using the high functional 4,4′-diphenyl-methane diisocyanate (MDI), polyester polyol, and 1,4-butane diol. The synthesized polyurethanes were analyzed using differential scanning calorimeter (DSC), dynamic mechanical thermal analysis (DMTA), Fourier transform infrared (FTIR) spectrometer, and swelling measurement using N,N′-dimethylformamide. From the result of thermal analysis by DSC and DMTA, single Tgs were observed in the polyurethane samples at all the formulated compositions. From this result, it is suggested that the polyurethanes synthesized in this study have crosslinked structure rather than the phase-separated segmented structure because of the high functionality (f = 2.9) of the MDI. By annealing the polyurethane samples using DSC, the Tgs were increased by 4.7-16.0°C at the various annealing temperatures. From the results of FTIR and swelling measurement of polyurethanes, it is suggested that the increase of Tg of the polyurethanes by annealing is not due to increase of the hydrogen bond strength but mainly due to the increase of the crosslink density.

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JO - Journal of Applied Polymer Science

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ER -

Properties of crosslinked polyurethanes synthesized from 4,4′-diphenylmethane diisocyanate and polyester polyol

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