Influence of mixed soft segments on microphase separation of polyurea elastomers

Autchara Pangon, Gregory P. Dillon, James Patrick Runt

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This paper describes the influence of mixed poly(tetramethylene oxide) (PTMO) soft segments on microphase separation and morphology, hydrogen bonding, and polymer transitions for a series of alternating polyurea copolymers prepared from a single modified diphenylmethane diisocyanate. The fraction of two PTMO soft segments [with molecular weight = 1000 and 250 g/mol] was systematically varied and incorporated during bulk polymerization. ATR-FTIR spectroscopy confirmed that the intended polymers were synthesized and was used to determine the state of the local hydrogen bonding in these copolymers. Systematic changes in hard domain microstructure as a function of soft segment composition were clearly observed in AFM tapping mode phase images: the polyureas become progressively disordered with increasing content of the shorter PTMO. This was confirmed in a quantitative fashion using small-angle X-ray scattering. Results from dynamic mechanical analysis experiments reveal rather significant changes in dynamic segmental relaxations and storage moduli at 25°C for this series of polyureas, which are in keeping with the findings from other experiments.

Original languageEnglish (US)
Pages (from-to)1837-1844
Number of pages8
JournalPolymer
Volume55
Issue number7
DOIs
StatePublished - Apr 1 2014

Fingerprint

Elastomers
Microphase separation
Oxides
Hydrogen bonds
Polymers
Copolymers
Dynamic mechanical analysis
X ray scattering
Elastic moduli
Experiments
Molecular weight
Polymerization
Spectroscopy
Microstructure
Chemical analysis
polyurea
polytetramethylene glycol

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Pangon, Autchara ; Dillon, Gregory P. ; Runt, James Patrick. / Influence of mixed soft segments on microphase separation of polyurea elastomers. In: Polymer. 2014 ; Vol. 55, No. 7. pp. 1837-1844.
@article{fa5d48265bc34e9783f506c03dfde9f6,
title = "Influence of mixed soft segments on microphase separation of polyurea elastomers",
abstract = "This paper describes the influence of mixed poly(tetramethylene oxide) (PTMO) soft segments on microphase separation and morphology, hydrogen bonding, and polymer transitions for a series of alternating polyurea copolymers prepared from a single modified diphenylmethane diisocyanate. The fraction of two PTMO soft segments [with molecular weight = 1000 and 250 g/mol] was systematically varied and incorporated during bulk polymerization. ATR-FTIR spectroscopy confirmed that the intended polymers were synthesized and was used to determine the state of the local hydrogen bonding in these copolymers. Systematic changes in hard domain microstructure as a function of soft segment composition were clearly observed in AFM tapping mode phase images: the polyureas become progressively disordered with increasing content of the shorter PTMO. This was confirmed in a quantitative fashion using small-angle X-ray scattering. Results from dynamic mechanical analysis experiments reveal rather significant changes in dynamic segmental relaxations and storage moduli at 25°C for this series of polyureas, which are in keeping with the findings from other experiments.",
author = "Autchara Pangon and Dillon, {Gregory P.} and Runt, {James Patrick}",
year = "2014",
month = "4",
day = "1",
doi = "10.1016/j.polymer.2014.02.009",
language = "English (US)",
volume = "55",
pages = "1837--1844",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",
number = "7",

}

Influence of mixed soft segments on microphase separation of polyurea elastomers. / Pangon, Autchara; Dillon, Gregory P.; Runt, James Patrick.

In: Polymer, Vol. 55, No. 7, 01.04.2014, p. 1837-1844.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of mixed soft segments on microphase separation of polyurea elastomers

AU - Pangon, Autchara

AU - Dillon, Gregory P.

AU - Runt, James Patrick

PY - 2014/4/1

Y1 - 2014/4/1

N2 - This paper describes the influence of mixed poly(tetramethylene oxide) (PTMO) soft segments on microphase separation and morphology, hydrogen bonding, and polymer transitions for a series of alternating polyurea copolymers prepared from a single modified diphenylmethane diisocyanate. The fraction of two PTMO soft segments [with molecular weight = 1000 and 250 g/mol] was systematically varied and incorporated during bulk polymerization. ATR-FTIR spectroscopy confirmed that the intended polymers were synthesized and was used to determine the state of the local hydrogen bonding in these copolymers. Systematic changes in hard domain microstructure as a function of soft segment composition were clearly observed in AFM tapping mode phase images: the polyureas become progressively disordered with increasing content of the shorter PTMO. This was confirmed in a quantitative fashion using small-angle X-ray scattering. Results from dynamic mechanical analysis experiments reveal rather significant changes in dynamic segmental relaxations and storage moduli at 25°C for this series of polyureas, which are in keeping with the findings from other experiments.

AB - This paper describes the influence of mixed poly(tetramethylene oxide) (PTMO) soft segments on microphase separation and morphology, hydrogen bonding, and polymer transitions for a series of alternating polyurea copolymers prepared from a single modified diphenylmethane diisocyanate. The fraction of two PTMO soft segments [with molecular weight = 1000 and 250 g/mol] was systematically varied and incorporated during bulk polymerization. ATR-FTIR spectroscopy confirmed that the intended polymers were synthesized and was used to determine the state of the local hydrogen bonding in these copolymers. Systematic changes in hard domain microstructure as a function of soft segment composition were clearly observed in AFM tapping mode phase images: the polyureas become progressively disordered with increasing content of the shorter PTMO. This was confirmed in a quantitative fashion using small-angle X-ray scattering. Results from dynamic mechanical analysis experiments reveal rather significant changes in dynamic segmental relaxations and storage moduli at 25°C for this series of polyureas, which are in keeping with the findings from other experiments.

UR - http://www.scopus.com/inward/record.url?scp=84897089940&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897089940&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2014.02.009

DO - 10.1016/j.polymer.2014.02.009

M3 - Article

VL - 55

SP - 1837

EP - 1844

JO - Polymer

JF - Polymer

SN - 0032-3861

IS - 7

ER -