Oppositely synchronized lamellar bending in poly(L-lactic acid) versus poly(D-lactic acid) blended with poly(1,4-butylene adipate)

Siti Nurkhamidah, Eamor Woo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Lamellar bending habits, as influenced by molecular-chain chirality, in packing into dendritic spherulites with specific optical patterns are discussed using two model polymers of opposite chirality that are blended with a common polymer as examples: i) poly(l-lactic acid)/poly(butylene adipate) (PLLA/PBA) and ii) poly(d-lactic acid)/PBA (PDLA/PBA) blends. The bending habits in the spherulites of PLLA or PDLA blended with PBA are dictated by the chirality, specifically the counterclockwise and clockwise directions for the PLLA/PBA (50:50) and PDLA/PBA (50:50) blends, respectively. Straight lamellae in spiral lozenge crystals are packed with crystal aggregates of PLLA on top of the flat-on lamellae plates acting as a basal plane during crystallization at T c; spiral lozenge-crystal frameworks are surrounded by needle-like crystals resembling PBA crystals.

Original languageEnglish
Pages (from-to)978-987
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume215
Issue number10
DOIs
Publication statusPublished - 2014 Jan 1

All Science Journal Classification (ASJC) codes

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

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