Miscibility with asymmetrical interactions in blends of two carbonyl-containing polymers

Poly(vinyl acetate) with aliphatic polyesters

Cluio Shun Chang, Eamor Woo, Jia Hsien Lin

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Phase behavior, miscibility, or immiscibility in blends of two polymers with carbonyl groups, PVAc and homologous polyesters of different CH 2/CO ratios, were examined using DSC, OM and SEM. Polyesters used in this study included PES, PEA, PPA, and PBA. PVAc/polyester blends were found to be immiscible with distinctly a two-phase morphology when the polyesters' structural CH2/CO ratios are lower than 3 or higher than 4; whereas miscibility is seen in three blend systems: PVAc/PEA (CH2/CO = 3.0), PVAc/PPA (CH2/CO = 3.5), and PVAc/PBA (CH2/ CO = 4.0). Asymmetry in the Tg-composition relationships is seen in all three miscible blend systems. Such non-specific, weak and asymmetrical interactions, though sufficient to maintain borderline miscibility in the blends, may be partially responsible for leading to the noted asymmetry in the T g-composition relation of the blends. Mechanism and origin of this phenomenon of asymmetry in Tg-composition relationships in some blends may be still puzzling. Strictly speaking, the non-equilibrium phenomenon of glass transition may not be ideal for evaluating the strength of intermolecular interactions in blends. Future perfection on more suitable approaches may yet be needed.

Original languageEnglish
Pages (from-to)1404-1413
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume207
Issue number15
DOIs
Publication statusPublished - 2006 Aug 2

Fingerprint

Polyesters
polyesters
Carbon Monoxide
acetates
Polymers
solubility
Solubility
polymers
Chemical analysis
interactions
asymmetry
Phase behavior
Glass transition
Scanning electron microscopy
vinyl acetate
methylidyne
scanning electron microscopy
glass

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "Phase behavior, miscibility, or immiscibility in blends of two polymers with carbonyl groups, PVAc and homologous polyesters of different CH 2/CO ratios, were examined using DSC, OM and SEM. Polyesters used in this study included PES, PEA, PPA, and PBA. PVAc/polyester blends were found to be immiscible with distinctly a two-phase morphology when the polyesters' structural CH2/CO ratios are lower than 3 or higher than 4; whereas miscibility is seen in three blend systems: PVAc/PEA (CH2/CO = 3.0), PVAc/PPA (CH2/CO = 3.5), and PVAc/PBA (CH2/ CO = 4.0). Asymmetry in the Tg-composition relationships is seen in all three miscible blend systems. Such non-specific, weak and asymmetrical interactions, though sufficient to maintain borderline miscibility in the blends, may be partially responsible for leading to the noted asymmetry in the T g-composition relation of the blends. Mechanism and origin of this phenomenon of asymmetry in Tg-composition relationships in some blends may be still puzzling. Strictly speaking, the non-equilibrium phenomenon of glass transition may not be ideal for evaluating the strength of intermolecular interactions in blends. Future perfection on more suitable approaches may yet be needed.",
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Miscibility with asymmetrical interactions in blends of two carbonyl-containing polymers : Poly(vinyl acetate) with aliphatic polyesters. / Chang, Cluio Shun; Woo, Eamor; Lin, Jia Hsien.

In: Macromolecular Chemistry and Physics, Vol. 207, No. 15, 02.08.2006, p. 1404-1413.

Research output: Contribution to journalArticle

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