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Miscibility, thermal properties and polymorphism of stereocomplexation of high-molecular-weight polylactide/poly(D,L-lactide) blends

Li, Yi ; Han, Changyu ; Bian, Yijie ; Dong, Qinglin ; Zhao, Hongwei ; Zhang, Xin ; Xu, Mingzhi ; Dong, Lisong

Thermochimica acta, 2014-03, Vol.580, p.53-62 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Miscibility, thermal properties and polymorphism of stereocomplexation of high-molecular-weight polylactide/poly(D,L-lactide) blends
  • Autor: Li, Yi ; Han, Changyu ; Bian, Yijie ; Dong, Qinglin ; Zhao, Hongwei ; Zhang, Xin ; Xu, Mingzhi ; Dong, Lisong
  • Assuntos: Blend ; Blends ; Crystal structure ; Crystallization ; Dynamical systems ; Dynamics ; Melting ; Miscibility ; Nonisothermal crystallization ; Poly(D-lactide) ; Poly(L-lactide) ; Polymer blends ; Stereocomplex
  • É parte de: Thermochimica acta, 2014-03, Vol.580, p.53-62
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: •High-molecular-weight sc-PLA and PDLLA blends were prepared.•The Tgs of the blends fit Gordon–Taylor equation.•Dynamic and isothermal crystallization of blends were assessed.•Full stereocomplexation was formed with 70wt% PDLLA.•Nucleation mechanism of sc-PLA was unaffected. High-molecular-weight stereocomplex-poly(L- and D-lactide) (sc-PLA) and poly(D, L-lactide) (PDLLA) blends were prepared by solution blending. The miscibility, crystallization kinetics, melting behavior and crystal structure of sc-PLA/PDLLA blends were investigated. The single composition-dependent Tgs of the blends indicated the miscible characteristic of the blend system at all compositions. The interesting aspect of this research is that the polymorphic crystallization of high-molecular-weight sc-PLA could be tailored by incorporation of miscible PDLLA with different dynamic and isothermal crystallization conditions. Full stereocomplexation can be formed with 70wt% PDLLA, irregardless of the crystallization conditions. The possible mechanism of the polymorphic crystallization of high-molecular-weight sc-PLA by incorporation of miscible PDLLA has been tried to propose.
  • Editor: Elsevier B.V
  • Idioma: Inglês;Holandês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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