Role of hard segment induced nanosized domain on concentrated solutions and bulk properties of ether based thermoplastic polyurethanes

K. W. Lem, D. S. Lee, J. R. Haw, G. S. Song, S. Curran, S. Sund, Z. Iqbal, C. Brumlik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A systematic study was conducted to investigate the effect of hard segment molecular weight on concentrated solution and bulk properties of thermoplastic ether based polyurethanes (TPUs). The molar feed was used to determine the molecular weight of the hard segment, and the weight fraction of the hard segment was then calculated as the ratio of the molecular weight of the hard segment to the number average molecular weight of the TPU determined by GPC. Similar to the study of dilution solution properties [1], it was found that rheological properties in concentration solutions, thermal properties and mechanical properties in the bulk were significantly affected at low weight fraction of the hard segment. Also, a limiting weight fraction of the hard segment was found at about 0.4 at above which the increase in weight fraction of the hard segment has a diminishing effect on the rheological properties in concentrated solution, thermal properties and dynamical mechanical properties in bulk.

Original languageEnglish (US)
Title of host publicationTechnical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
Pages60-63
Number of pages4
StatePublished - Nov 23 2011
EventNanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011 - Boston, MA, United States
Duration: Jun 13 2011Jun 16 2011

Publication series

NameTechnical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
Volume1

Other

OtherNanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
CountryUnited States
CityBoston, MA
Period6/13/116/16/11

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Keywords

  • A limiting weight fraction of the hard segment
  • Bulk properties
  • Concentration solution properties
  • Han plot
  • Thermoplastic polyurethanes (TPUs)

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