Citation: Li-fen Zhao, Jun Cheng, Xiu-juan Tian, Ru-liang Zhang. Miscibility and Isothermal Crystallization of Poly(L-lactide) and Poly(trimethylene carbonate) Blends[J]. Chinese Journal of Polymer Science, ;2015, 33(3): 499-507. doi: 10.1007/s10118-015-1604-4 shu

Miscibility and Isothermal Crystallization of Poly(L-lactide) and Poly(trimethylene carbonate) Blends

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School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Corresponding author: Li-fen Zhao,
Received Date: 4 July 2014
Revised Date: 27 September 2014

Fund Project: This work was financially supported by the Shandong Province High School Science Technology Fund Planning Project (No. J13LA52).

Miscibility, isothermal crystallization kinetics, and morphology of poly(L-lactide)/poly(trimethylene carbonate) (PLLA/PTMC) crystalline/amorphous blends were studied by differential scanning calorimetry (DSC) and optical microscopy (OM). The heterogeneity of OM images and an unchanged glass transition temperature showed that PLLA was immiscible with PTMC. During isothermal crystallization, the crystallization rate of PLLA improved when the PTMC content was low ( 20%). However, when the PTMC content was high ( 30%), the crystallization rate decreased significantly. The reason of these nonlinear changes in crystal kinetics was analyzed according to the nucleation and growth process by virtue of a microscope heating stage. The isothermal crystallization morphologies of the blends were also studied by polarized optical microscopy and the results confirmed the conclusions obtained from crystallization kinetics.
- Poly(L-lactide),
- Poly(trimethylene carbonate),
- Miscibility,
- Crystal kinetics
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沈阳化工大学材料科学与工程学院沈阳 110142