Fibers and Polymers

The Korean Fiber Society (한국섬유공학회)
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Epoxidized Polybutadiene as a Thermal Stabilizer for Poly(3-hydroxybutyrate). II. Thermal Stabilization of Poly(3-hydroxybutyrate) by Epoxidized Polybutadiene

  • Choi, Ju-Yol (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Lee, Jong-Keun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • You, Young (Department of Textile Engineering, School of Engineering, Chungnam National University) ;
  • Park, Won-Ho (Department of Textile Engineering, School of Engineering, Chungnam National University)
  • Published : 2003.12.01
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Abstract

Epoxidized polybutadiene (EPB) was prepared by polybutadiene (PB) with m-chloroperbenzoic acid (MCPBA) in homogeneous solution. EPB was blended with poly(3-hydroxybutyrate) (PHB) up to 30 wt% by solution-precipitation procedure. The thermal decomposition of PHB/EPB blends was studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and differential thermal analysis (DTA). The thermograms of PHB/EPB blends contained a two-step degradation process, while that of pure PHB sample exhibited only one-step degradation process. This degradation behavior of PHB/EPB blends, which have a higher thermal stability as measured by maximum decomposition temperature and residual weight, is probably due to crosslinking reactions of the epoxide groups in the EPB component with the carboxyl chain ends of PHB fragments during the degradation process, and the occurrence of such reactions can be assigned to the exothermic peaks in their DTA thermograms.

Keywords

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