Tacticity effects on glass transition and phase behavior in binary blends of poly(methyl methacrylate)s of three different configurations

Ling Chang, E. M. Woo

研究成果: Article同行評審

27 引文 斯高帕斯(Scopus)

摘要

Using optical and scanning electron microscopies, dynamic mechanical analysis, and differential scanning calorimetry, this study investigated effects of tacticity in PMMAs on the phase behavior in three pairs of binary blends comprising any two of isotactic-, syndiotactic-, and atactic-PMMAs. Miscibility was confirmed for all three binary blends (i.e., aPMMA/iPMMA, aPMMA/sPMMA, and iPMMA/sPMMA); however, the Tgvs. composition relationships for the aPMMA/iPMMA blend differ significantly. Configurational tacticity may lead to subtle differences in molecular interactions in the tactic polymers; and in turn such difference in the interactions causes variation in the glass transition and phase behavior in these three blends. This study also points out that the miscibility nature in iPMMA/sPMMA may constitute a prerequisite condition (necessary but not sufficient) for its tendency in forming complexes.

原文English
頁(從 - 到)198-202
頁數5
期刊Polymer Chemistry
1
發行號2
DOIs
出版狀態Published - 2010 4月 1

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 生物化學
  • 聚合物和塑料
  • 有機化學

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