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

Shu Hsien Li, E. M. Woo

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)766-777
頁數12
期刊Journal of Applied Polymer Science
107
發行號2
DOIs
出版狀態Published - 2008 1月 15

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 表面、塗料和薄膜
  • 聚合物和塑料
  • 材料化學

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