Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid)

温亮; 辛忠

doi:10.1016/S1004-9541(09)60145-2

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Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid)

Updated：2026-01-06

- Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid)
- Chinese Journal of Chemical Engineering Vol. 18, Issue 6, Pages: 899-904(2010)
- Affiliations：
  
  State Key Laboratory of Chemical Engineering, East China University of Science and Technology,Shanghai,China,200237
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(09)60145-2
  CLC：
- Published：2010
- Accepted：
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WEN Liang, XIN Zhong. Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid)[J]. , 2010, 18(6): 899-904.
DOI：

WEN Liang, XIN Zhong. Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid)[J]. , 2010, 18(6): 899-904. DOI： 10.1016/S1004-9541(09)60145-2.

摘要

Abstract

The effect of a novel active nucleating agent(TBC8-eb) on the isothermal crystallization of poly(L-lactic acid) (PLLA) was studied by differential scanning calorimetry(DSC) and Fourier transform infrared spectroscopy(FTIR). The analysis on kinetics demonstrates that TBC8-eb can not only accelerate the crystallization rate but also transform most of the original spherulite crystals of PLLA into sheaf-like crystals. Furthermore

the free energy of folding(σ

) of PLLA and PLLA with TBC8-eb is 0.15 and 0.06 J·m

-2

respectively

which suggests that the addition of TBC8-eb favors the regular folding of molecule chains in the crystallization of PLLA

improv-ing its crystallization rate. The FTIR results show that TBC8-eb can accelerate the conformational ordering of PLLA in the isothermal crystallization. The conformational ordering of PLLA nucleated with TBC8-eb begins with the interchain interaction of —CH

and then a short helix emerges where a couple of —CH

groups interact.

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