Crystallization of Poly(L-lactide) in a Confined Space between Polycarbonate Layers

Ri Chao Zhang*, Zhihuan Huang, Dan Sun, Ai Lu, Meiling Zhong, Zhenxing Fang, Dehui Ji, Guangyao Xiong, Yizao Wan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this paper, various thicknesses of PLLA film between PC layers are obtained by spin coating of different amount of solution. The crystal morphologies and isothermal crystallization rates of poly(L-lactide) (PLLA) in the confined spaces between polycarbonate (PC) layers have been studied by polarized optical microscopy. The Crystal morphologies of poly(L-lactide) are little influenced by the thickness of PLLA films between PC layers. Nevertheless, the crystal growth and nucleation rates of PLLA films between PC layers are remarkably affected by the thickness of PLLA films. In the confined space, the nucleation and growth rates of PLLA films decrease as its thickness decreases. The observed phenomena has been ascribed to the reduction of molecular chain mobility, and the slow diffusion process of molecular chains. The results offer greater insights into the materials process-structure-property relationship, and help with design of future biomaterials with tailored/controlled structures/properties (such as crystallinity/ degradation rate) for specific biomedical applications.

Original languageEnglish
Pages (from-to)171-179
Number of pages9
JournalJournal of Polymer Materials
Issue number2
Publication statusPublished - Jun 2018


  • Confined spaces
  • Diffusion
  • Growth rate
  • Poly(L-lactide)
  • Polycarbonate

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry


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