Glass transition and miscibility in blends of two semicrystalline polymers

Poly(aryl ether ketone) and poly(ether ether ketone)

Eamor Woo, Yi Chern Tseng

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Binary melt-blended mixtures of two aryl ether ketone polymers (i.e., a new poly(aryl ether ketone) (code name PK99) and poly(ether ether ketone) (PEEK), have been studied. Polymer miscibility in glassy amorphous (or melt) domains has been demonstrated for the binary blend comprising of two aryl-ether-ketone-type semicrystalline polymers. Composition-dependent, single Tg was observed within full composition range in the PK99/PEEK blends, and the narrow Tg breadth also suggests that the scale of mixing was fine and uniform. To better resolve any possible overlapping Tg's, physical aging was imposed on a comparison set of blend samples for the purpose of improving detectability of overlapped multiple transitions if existing. The result still showed one single Tg. The relative sharp Tg and lack of cloud point transition suggest that the scale of molecular intermixing is good. Phase homogeneity was further confirmed using optical and scanning electron microscopy. The X-ray diffractograms suggest that isomorphism does not exist in the PK99/PEEK blends and that the crystal forms of the respective polymers remain distinct and unchanged by the miscibility in the amorphous region.

Original languageEnglish
Pages (from-to)1485-1494
Number of pages10
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume37
Issue number13
DOIs
Publication statusPublished - 1999 Jul 1

Fingerprint

Polyether ether ketones
Polymer blends
Ketones
ketones
Ether
Glass transition
Ethers
ethers
Polymers
solubility
Solubility
glass
polymers
Chemical analysis
Aging of materials
X rays
Crystals
Scanning electron microscopy
isomorphism
transition points

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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abstract = "Binary melt-blended mixtures of two aryl ether ketone polymers (i.e., a new poly(aryl ether ketone) (code name PK99) and poly(ether ether ketone) (PEEK), have been studied. Polymer miscibility in glassy amorphous (or melt) domains has been demonstrated for the binary blend comprising of two aryl-ether-ketone-type semicrystalline polymers. Composition-dependent, single Tg was observed within full composition range in the PK99/PEEK blends, and the narrow Tg breadth also suggests that the scale of mixing was fine and uniform. To better resolve any possible overlapping Tg's, physical aging was imposed on a comparison set of blend samples for the purpose of improving detectability of overlapped multiple transitions if existing. The result still showed one single Tg. The relative sharp Tg and lack of cloud point transition suggest that the scale of molecular intermixing is good. Phase homogeneity was further confirmed using optical and scanning electron microscopy. The X-ray diffractograms suggest that isomorphism does not exist in the PK99/PEEK blends and that the crystal forms of the respective polymers remain distinct and unchanged by the miscibility in the amorphous region.",
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