Effects of miscible diluent of poly(ether imide) on ring-banded morphology of poly(trimethylene terephthalate)

E. M. Woo, Pi Ling Wu

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

The melting, crystallization, and self-packed ring patterns in the spherulites of miscible blends comprising poly(trimethylene terephthalate) (PTT) and poly(ether imide) (PEI) were revealed by optical, scanning electron microscopies (PLM and SEM) and differential scanning calorimetry (DSC). Morphology and melting behavior of the miscible PTT/PEI blends were compared with the neat PTT. Ringed spherulites appeared in the miscible PTT/PEI blends at all crystallization temperatures up to 220 °C, whereas at this high temperature no rings were seen in the neat PTT. A postulation was proposed, and interrelations between rings in spherulites and the multiple lamellae distributions were investigated. The specific interactions and the segregation of amorphous PEI were discussed for interpreting the morphological changes of 220 °C-melt-crystallized PTT/PEI samples. Interlamellar segregation of PEI might be associated with multiple lamellae in the spherulites of PTT/PEI blends; therefore, rings were more easily formed in the PTT/PEI blends at all crystallization temperatures. A postulated model of uneven lamellar growth, coupled with periodical spiraling, more properly describes the possible origin of ring bands from combined effects of both interactions and segregation between the amorphous PEI and PTT in blends.

原文English
頁(從 - 到)357-365
頁數9
期刊Colloid and Polymer Science
284
發行號4
DOIs
出版狀態Published - 2006 一月 1

All Science Journal Classification (ASJC) codes

  • 物理與理論化學
  • 聚合物和塑料
  • 膠體和表面化學
  • 材料化學

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