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Citation: ZHOU Li-Li, DENG Peng-Yang, WU Hang, DONG Li-Song. Crystallization of Poly(3-hydroxybutyrate-co-3-hydroxy-valerate) with Terephthalic Acid as Heterogeneous Nucleating Agent[J]. Chinese Journal of Applied Chemistry, ;2006, 23(1): 89-93. shu

Crystallization of Poly(3-hydroxybutyrate-co-3-hydroxy-valerate) with Terephthalic Acid as Heterogeneous Nucleating Agent

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
2.
b Graduate School of the Chinese Academy of Sciences, Beijing

Corresponding author: DONG Li-Song,
Received Date: 5 February 2005
Available Online: 22 August 2005

The crystallization behavior of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was investigated by means of differential scanning calorimetry(DSC).The results show that terephthalic acid(TPA) is a most effective heterogeneous nucleating agent for the crystallization of PHBV.When the mass fraction of terephthalic acid was 0.5%, the initial crystallization temperature increased from 90℃ to 110℃ and the temperature range of crystallization decreased by 2.5 times.The crystalline enthalpy increased by 20 J/g.The Avrami exponent n reached to 7.0 calculated by means of Avrami's equation, the fold surface free energy σ_e of PHBV decreased remarkably estimated according to Lauritzen-Hoffman theory.
- PHBV,
- nucleating agent,
- crystallization rate
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