Effects of stereocomplex nuclei or spherulites on crystalline morphology and crack behavior of poly(L -lactic acid)

Siti Nurkhamidah, Eamor M. Woo

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15 Citations (Scopus)

Abstract

Introduction of sc-PLA crystals as small nuclei or large sc-PLA spherulites has great influence on patterning the inter-phase boundaries and reducing the cracks in crystallized PLLA in mixtures with PDLA. Unmelted sc-PLA crystals as nuclei induce cracks in later-crystallized PLLA, whereas co-crystallization of PLLA with PDLA to develop simultaneous PLLA and sc-PLA spherulites is effective in altering the inter-phases for minimizing the cracks. PLLA co-crystallized with sc-PLA spherulites tends to be more compact than PLLA spherulites crystallizing on sc-PLA nuclei. In general, the sc-PLA spherulites suppress the occurrence of a stressed interphase in PLLA spherulites and the depth of cooling-induced cracks is also decreased.

Original languageEnglish
Pages (from-to)1663-1670
Number of pages8
JournalMacromolecular Chemistry and Physics
Volume212
Issue number15
DOIs
Publication statusPublished - 2011 Aug 2

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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