Comparison of glass transition and interpretation on miscibility in blends of amorphous polyvinyl methyl ether with highly crystallizable versus less-crystallizable polyesters

Wan Jing Chiang, E. M. Woo

研究成果: Review article同行評審

6 引文 斯高帕斯(Scopus)

摘要

Various phase behavior of blends of poly(vinyl ether)s with polyesters of two types (highly crystalline and less crystalline with different main-chains) were examined using differential scanning calorimetry (DSC) and optical microscopy (OM). Effects of varying the main-chain polarity of the constituent polyesters on the phase behavior of the blends were analyzed. Miscibility in PVME/polyester blends was found only in polyesters with backbone CH 2/CO ratio = 3.5 to 7.0). Tg-composition relationships for blends of PVME with highly crystalline polyesters (PBA, PHS) were found to differ significantly from those for PVME blends with less-crystalline polyesters (PTA, PEAz). Crystallinity of highly crystalline polyester constituents in blends caused significant asymmetry in the Tg-composition relationships, and induced positive deviation of blends' Tg above linearity; on the other hand, blends of PVME with less crystalline polyesters exhibit typical Fox or Gordon-Taylor types of relationships. The x parameters for the miscible blends were found to range from -0.17 to -0.33, reflecting generally weak interactions. Phase behavior was analyzed and compared among blends of PVME with rapidly crystallizing vs. less-crystallizing polyesters, respectively. Effects of polyesters' crystallinity and structures on phase behavior of PVME/polyester blends are discussed.

原文English
頁(從 - 到)2899-2911
頁數13
期刊Journal of Polymer Science, Part B: Polymer Physics
45
發行號20
DOIs
出版狀態Published - 2007 十月 15

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 物理與理論化學
  • 聚合物和塑料
  • 材料化學

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