Polyurethaan triblock copolymers with mono-disperse hard segments. Influence of the hard segment length on thermal and thermomechanical properties

A. Araichimani, Kasper K.J. Baack, R.J. Gaymans

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

Polyurethane triblock copolymers were synthesized by reacting 4,4-methylenebis(phenyl isocyanate) (MDI)-endcapped poly(tetramethylene oxide) (PTMO) with mono-amine-amide (MMA) units. Four different MMA units were used, i.e. no-amide (6m), mono-amide (6B), di-amide (6T6m) and tri-amide (6T6B), based on hexylamine (6m), 1,6-hexamethylenediamine (6), terephthalic acid (T), and benzoic acid (B). The PTMO had a molecular weight of 2000 g/mol. Thermal and thermo-mechanical properties were studied by means of differential scanning calorimetry and dynamic mechanical analysis, respectively. The structure of the carbonyl bond was explored by infra-red analysis and the elastic behavior of the materials by compression set experiments. The triblock polyurethanes with mono-disperse, hard end-segments displayed low molecular weights (3200-3800 g/mol). The crystallinity of the MDI urethane-urea group was found to depend on the structure of the amide. Increasing the number of amide bonds in the mono-disperse hard segment increased the modulus and the hard segment melting temperature, and decreased the compression set values. The low temperature properties were hardly affected by the amide length
Original languageUndefined
Pages (from-to)1222-1230
JournalPolymer engineering and science
Volume48
Issue number6
Publication statusPublished - 2008

Keywords

  • METIS-254530
  • IR-68864

Cite this

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title = "Polyurethaan triblock copolymers with mono-disperse hard segments. Influence of the hard segment length on thermal and thermomechanical properties",
abstract = "Polyurethane triblock copolymers were synthesized by reacting 4,4-methylenebis(phenyl isocyanate) (MDI)-endcapped poly(tetramethylene oxide) (PTMO) with mono-amine-amide (MMA) units. Four different MMA units were used, i.e. no-amide (6m), mono-amide (6B), di-amide (6T6m) and tri-amide (6T6B), based on hexylamine (6m), 1,6-hexamethylenediamine (6), terephthalic acid (T), and benzoic acid (B). The PTMO had a molecular weight of 2000 g/mol. Thermal and thermo-mechanical properties were studied by means of differential scanning calorimetry and dynamic mechanical analysis, respectively. The structure of the carbonyl bond was explored by infra-red analysis and the elastic behavior of the materials by compression set experiments. The triblock polyurethanes with mono-disperse, hard end-segments displayed low molecular weights (3200-3800 g/mol). The crystallinity of the MDI urethane-urea group was found to depend on the structure of the amide. Increasing the number of amide bonds in the mono-disperse hard segment increased the modulus and the hard segment melting temperature, and decreased the compression set values. The low temperature properties were hardly affected by the amide length",
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author = "A. Araichimani and Baack, {Kasper K.J.} and R.J. Gaymans",
year = "2008",
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Polyurethaan triblock copolymers with mono-disperse hard segments. Influence of the hard segment length on thermal and thermomechanical properties. / Araichimani, A.; Baack, Kasper K.J.; Gaymans, R.J.

In: Polymer engineering and science, Vol. 48, No. 6, 2008, p. 1222-1230.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Polyurethaan triblock copolymers with mono-disperse hard segments. Influence of the hard segment length on thermal and thermomechanical properties

AU - Araichimani, A.

AU - Baack, Kasper K.J.

AU - Gaymans, R.J.

PY - 2008

Y1 - 2008

N2 - Polyurethane triblock copolymers were synthesized by reacting 4,4-methylenebis(phenyl isocyanate) (MDI)-endcapped poly(tetramethylene oxide) (PTMO) with mono-amine-amide (MMA) units. Four different MMA units were used, i.e. no-amide (6m), mono-amide (6B), di-amide (6T6m) and tri-amide (6T6B), based on hexylamine (6m), 1,6-hexamethylenediamine (6), terephthalic acid (T), and benzoic acid (B). The PTMO had a molecular weight of 2000 g/mol. Thermal and thermo-mechanical properties were studied by means of differential scanning calorimetry and dynamic mechanical analysis, respectively. The structure of the carbonyl bond was explored by infra-red analysis and the elastic behavior of the materials by compression set experiments. The triblock polyurethanes with mono-disperse, hard end-segments displayed low molecular weights (3200-3800 g/mol). The crystallinity of the MDI urethane-urea group was found to depend on the structure of the amide. Increasing the number of amide bonds in the mono-disperse hard segment increased the modulus and the hard segment melting temperature, and decreased the compression set values. The low temperature properties were hardly affected by the amide length

AB - Polyurethane triblock copolymers were synthesized by reacting 4,4-methylenebis(phenyl isocyanate) (MDI)-endcapped poly(tetramethylene oxide) (PTMO) with mono-amine-amide (MMA) units. Four different MMA units were used, i.e. no-amide (6m), mono-amide (6B), di-amide (6T6m) and tri-amide (6T6B), based on hexylamine (6m), 1,6-hexamethylenediamine (6), terephthalic acid (T), and benzoic acid (B). The PTMO had a molecular weight of 2000 g/mol. Thermal and thermo-mechanical properties were studied by means of differential scanning calorimetry and dynamic mechanical analysis, respectively. The structure of the carbonyl bond was explored by infra-red analysis and the elastic behavior of the materials by compression set experiments. The triblock polyurethanes with mono-disperse, hard end-segments displayed low molecular weights (3200-3800 g/mol). The crystallinity of the MDI urethane-urea group was found to depend on the structure of the amide. Increasing the number of amide bonds in the mono-disperse hard segment increased the modulus and the hard segment melting temperature, and decreased the compression set values. The low temperature properties were hardly affected by the amide length

KW - METIS-254530

KW - IR-68864

M3 - Article

VL - 48

SP - 1222

EP - 1230

JO - Polymer engineering and science

JF - Polymer engineering and science

SN - 0032-3888

IS - 6

ER -