Weak interaction, marginal miscibility, and ring-band spherulites in blends of poly(vinylidene fluoride) with polyesters

Shu Hsien Li, E. M. Woo

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Fourier transform infrared (FTIR) spectroscopy, optical microscopy (OM), and differential scanning calorimetry (DSC) techniques were used to probe phase behavior and interactions in blends of poly(vinylidene fluoride) (PVDF) and polyesters [poly(trimethylene adipate) (PTA) and poly(pentamethylene adipate) (PPA)] of relatively low crystallizability, DSC thermal analysis and OM characterization proved that PVDF was miscible with PTA and PPA with a low lower critical solution temperature. Small negative values of the interaction parameters (x12 -0.13 for a PVDF/PPA blend) were obtained with the meltingpoint depression method. FTIR spectroscopy results revealed that interactions between -CF2 of PVDF and the -C=O group of the polyester were weak, in agreement with the thermal analysis results. An increase in the coarseness and/or ring-band spacing further provided supportive evidence that miscibility did exist between the polyester and PVDF constituents in the blends. Pattern changes in ring-band spherulites of the miscible blends further substantiated the favorable, though weak, interactions between the PVDF and polyester constituents.

Original languageEnglish
Pages (from-to)766-777
Number of pages12
JournalJournal of Applied Polymer Science
Volume107
Issue number2
DOIs
Publication statusPublished - 2008 Jan 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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