The sunken morphology of poly(lactic acid) stereocomplex spherulite | Zendy

Liu Yanping | Zendy; Zhang Mengnan | Zendy; Wei Hanghang | Zendy; Wang Zhen | Zendy; Zeng Jun | Zendy; Qian Li | Zendy

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The sunken morphology of poly(lactic acid) stereocomplex spherulite

Author(s) -

Liu Yanping,

Zhang Mengnan,

Wei Hanghang,

Wang Zhen,

Zeng Jun,

Qian Li

Publication year - 2019

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.5861

Subject(s) - spherulite (polymer physics) , materials science , morphology (biology) , microstructure , nanoindentation , composite material , crystallization , lactic acid , chemical engineering , polymer , genetics , bacteria , engineering , biology

The mechanical properties and microstructure of poly(lactic acid) (PLA) stereocomplex spherulite at the micrometric scale were investigated using nanoindentation and synchrotron radiation scanning X‐ray microdiffraction, which exhibits a new growth habit with more and more compact lamellae. Using atomic force microscopy and laser scanning confocal microscopy, a unique sunken morphology was found. Unbalanced surface stress and volume shrinkage are proposed as the main factors for the sunken morphology, which is also contributed by a novel growth regime driven by the hydrogen bonding between two PLA enantiomers. © 2019 Society of Chemical Industry

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