Thermal behavior of ring-band versus maltese-cross spherulites: Case of monomorphic poly(ethylene adipate)

Eamor M. Woo, Pi Ling Wu, Ming Chien Wu, Kai Cheng Yan

研究成果: Article同行評審

53 引文 斯高帕斯(Scopus)

摘要

Two types of spherulites, extinction-ring and Maltese-cross, in polyethylene adipate) (PEA) were identified, isolated, and separately characterized using DSC and polarized-light optical microscopy (POM). Ring-band spherulites in PEA occurred only in a very narrow temperature range roughly between 25 and 30°C, while Maltese-cross spherulites at 35°C and above or at 20°C and below. Thermal behavior of ring-spherulites is interpreted, analyzed, and compared to that of Maltese-cross spherulites. The thermal behavior, like the morphology, was found to be significantly different between these two types of spherulites. Among the three multiple melting peaks in PEA, the highest P3 is proven to be related to melting of lamellae in the ring-band spherulites; P1 and P2, whose relative extent of overlapping is dependent on the temperature of crystallization, are related to melting of lamellae in the regular ringless spherulites. This study has provided urgent and timely evidence for one major step further in the interpretation of relationships between the thermal behavior, melting, and extinction-ring versus Maltese-cross spherulites in semi-crystalline polymers.

原文English
頁(從 - 到)2232-2243
頁數12
期刊Macromolecular Chemistry and Physics
207
發行號23
DOIs
出版狀態Published - 2006 12月 1

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
  • 有機化學
  • 材料化學

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