Unusual Radiating-Stripe Morphology in Nonequimolar Mixtures of Poly(l -lactic acid) with Poly(d -lactic acid)

Hsin Ping Chen, Selvaraj Nagarajan, Eamor M. Woo

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

Extensive microscopic and thermal analyses and X-ray diffraction characterizations are conducted to investigate an unusual morphology and its evolution in extreme nonequimolar mixtures of poly(L-lactic acid)(PLLA) with poly(D-lactic acid) (PDLA) containing a trace amount of stereocomplex crystals. Radiating-stripe spherulites are crystallized on first-grown PLLA/PDLA sc-crystals that act as template substrates for later-grown PLLA. Growth kinetics are analyzed to attempt interpretations on understanding why the unusual PLLA morphology with distinct large radiating dendrites can be packed only in narrow ranges of nonequimolar PLLA/PDLA = 98/2 to 90/10 mixtures and only when crystallized within a suitable Tc range of 125-140 °C. Additionally, the interior lamellar assembly for the radiating-stripe PLLA spherulites is dissected to correlate with this unusual morphology with rodlike optical birefringence patterns.

原文English
頁(從 - 到)2157-2168
頁數12
期刊Macromolecules
53
發行號6
DOIs
出版狀態Published - 2020 三月 24

All Science Journal Classification (ASJC) codes

  • 有機化學
  • 聚合物和塑料
  • 無機化學
  • 材料化學

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