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Crystallization of a Self-Assembling Nucleator in Poly(L-lactide) Melt

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  • معلومة اضافية
    • Publisher Information:
      American Chemical Society 2021-09-01
    • نبذة مختصرة :
      [EN]In the present work, crystallization of a soluble nucleator N, N′, N″-tricyclohexyl-1,3,5-benzenetricarboxylamide (TMC-328) in a poly(l-lactic acid) (PLLA) matrix has been studied at different temperatures. Based on the change in solubility with temperature, different levels of supersaturation of TMC-328 in a PLLA matrix can be obtained. This nucleator presents a fibrous structure produced via self-assembling and develops into an interconnected network when the temperature is lowered. The TMC-328 crystal nuclei density is quantified via optical microscopy, using the average distance of the adjacent fibrillar structure, which shows a steady decrease with the decrease in temperature. The crystallization rates of TMC-328 were assessed through rheological measurements of network formation. Both fibrils’ density and crystallization kinetics display a power law dependence on supersaturation. For the first time, the solid–melt interfacial energy, the size of the critical nucleus, and the number of molecules making up the critical nucleus of the nucleator TMC-328 in the PLLA matrix have been determined by adopting the classical nucleation theory. The subsequent crystallization of PLLA induced by this nucleator was investigated as a function of the fibrils’ spatial density. The crystallization rate of PLLA is enhanced with the increase in the TMC-328 fibrils’ density because of the availability of a larger nucleating surface. The self-assembled fibril of TMC-328 can serve as shish to form a hybrid shish-kebab structure after the crystallization of PLLA, regardless of the number of nucleation sites.
    • الموضوع:
      crystal morphology; tailoring crystallization; mechanical-properties; phase-behavior; kinetics; agent; acid; performance; polylactide; PLLA; info:eu-repo/semantics/article
    • Availability:
      Open access content. Open access content
    • Note:
      W.W. thanks the China Scholarship Council (CSC) for funding his Ph.D. scholarship. We would like to thank the financial support provided by the BIODEST project; this project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement no. 778092.
      English
    • Other Numbers:
      ESUPV oai:addi.ehu.es:10810/53805
      1286735052
    • Contributing Source:
      REPOSITORIO DE LA UNIVERSIDAD DEL PAIS
      From OAIster®, provided by the OCLC Cooperative.
    • الرقم المعرف:
      edsoai.on1286735052
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