Mechanical properties and hysteresis behaviour of multigraft copolymers

U. Staudinger, R. Weidisch*, Y. Zhu, S. P. Gido, D. Uhrig, J. W. Mays, H. Iatrou, Nikolaos Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

PS-PI multigraft copolymers with tri- tetra- and hexafunctional polystyrene branch points have been studied to investigate the influence of molecular architecture on morphological and tensile properties and to find novel material concepts. It was found that the morphological behaviour of these grafted copolymers can be predicted using theoretical approaches. The number of branch points, however, greatly influences the long-range order of microphase separation. Additionally, two new parameters for adjusting mechanical properties of multigraft copolymers are found in our investigations: i) functionality of the graft copolymer: tri-, tetra- or hexafunctional and 2) number of branch points per molecule. Tetra-functional multigraft copolymers show surprising high strain at break values up to 1550 %. With increasing number of branch points strain at break and tensile strength increase, where a linear dependence of mechanical properties on the number of branch points is obvious. Excellent elasticity of tetra and hexafunctional multigraft copolymers at high deformation was proved in hysteresis experiments.

Original languageEnglish (US)
Pages (from-to)42-50
Number of pages9
JournalMacromolecular Symposia
Volume233
DOIs
StatePublished - Apr 17 2006

Keywords

  • Elasticity
  • Morphology
  • Multigraft copolymers
  • Self-assembly
  • Tensile properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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