Isothermal cold crystallization kinetics of polylactide/nucleating agents |
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| Authors: | Ruogu Liao Bin Yang Wei Yu Chixing Zhou |
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| Affiliation: | Department of Polymer Science and Engineering, Shanghai Jiao Tong University, People's Republic Of China |
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| Abstract: | The isothermal cold crystallization kinetics of polylactide (PLA)/nucleating agents (CaCO3, TiO2, and BaSO4, content from 0.5–2.0 wt %) was investigated by differential scanning calorimetry in the temperature range of 120–124°C. With blending nucleating agents, the crystallinity of PLA had a maximum crystallinity of 14.9%. Crystallization rate decreased with increasing crystallization temperature in the researched content range. The crystallization rate followed the Avrami equation with the exponent n around 4.5. From Lauritzen–Hoffman equation, the nucleation parameter Kg was estimated. And from the value of Kg, regime II crystallization behavior can be concluded. Then the lateral and fold surface free energy were calculated from Kg. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 310–317, 2007 |
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| Keywords: | crystallization nucleation differential scanning calorimetry (DSC) |
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