Crystallization and solid-state structure of model poly(ethylene oxide) blends

James Patrick Runt

Research output: Contribution to journalArticle

Abstract

This paper presents an overview of several studies whose overall goal is to elucidate the solid state microstructure and crystallization kinetics of melt-miscible polymer blends. Model blends were prepared with poly(ethylene oxide) and four amorphous polymer diluents: two exhibiting relatively weak intermolecular interactions with PEO and two exhibiting strong interactions. Small-angle x-ray scattering experiments showed that the introduction of strong intermolecular interactions promoted diluent segregation over relatively large length scales, regardless of diluent mobility at the crystallization temperature. In addition, at a given Tc, spherulitic growth rates for blends with the strongly interacting polymers are considerably lower than those with weakly interacting polymers with comparable Tgs. To a first approximation, growth rates for PEO and the blends can be superposed when normalized by the degree of supercooling and T - Tg. Finally, the chapter concludes with a brief review of recent time-resolved small and wide-angle x-ray experiments conducted on PEO and the same blends.

Original languageEnglish (US)
Pages (from-to)218-231
Number of pages14
JournalACS Symposium Series
Volume739
StatePublished - Dec 1 1999

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Crystallization
Polyethylene oxides
Polymers
X rays
Supercooling
Crystallization kinetics
Polymer blends
Experiments
Scattering
Microstructure
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "This paper presents an overview of several studies whose overall goal is to elucidate the solid state microstructure and crystallization kinetics of melt-miscible polymer blends. Model blends were prepared with poly(ethylene oxide) and four amorphous polymer diluents: two exhibiting relatively weak intermolecular interactions with PEO and two exhibiting strong interactions. Small-angle x-ray scattering experiments showed that the introduction of strong intermolecular interactions promoted diluent segregation over relatively large length scales, regardless of diluent mobility at the crystallization temperature. In addition, at a given Tc, spherulitic growth rates for blends with the strongly interacting polymers are considerably lower than those with weakly interacting polymers with comparable Tgs. To a first approximation, growth rates for PEO and the blends can be superposed when normalized by the degree of supercooling and T - Tg. Finally, the chapter concludes with a brief review of recent time-resolved small and wide-angle x-ray experiments conducted on PEO and the same blends.",
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Crystallization and solid-state structure of model poly(ethylene oxide) blends. / Runt, James Patrick.

In: ACS Symposium Series, Vol. 739, 01.12.1999, p. 218-231.

Research output: Contribution to journalArticle

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