Abstract
Bacterial polyester poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) containing 5 mol% 4HB was composited with different calcium carbonate (CaCO 3) fillers. The effect of CaCO3 contents on thermal properties, mechanical property, and crystallization kinetics was evaluated. The thermal stability of P3/4HB was reduced by mixing with CaCO3 particles. With increasing CaCO3 content, the elongation at break, tensile strength, and impact strength decrease; however, elastic modulus increases. When P3/4HB with 20 mol% 4HB was added into the P3/4HB/CaCO 3 composite, the impact strength were enhanced significantly; however, the elongation at break and tensile strength were only slight to moderate improvements. However, when compared with nano- and light-CaCO 3, heavy CaCO3 had the best mechanical properties. The nonisothermal and isothermal crystallization results demonstrated that the crystallization rate of P3/4HB was reduced and the highest crystallinity was obtained for all kinds of CaCO3 fillers at 40 phr content.
Original language | English (US) |
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Pages (from-to) | 1134-1142 |
Number of pages | 9 |
Journal | Polymer Composites |
Volume | 32 |
Issue number | 7 |
DOIs | |
State | Published - Jul 1 2011 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Chemistry(all)
- Polymers and Plastics
- Materials Chemistry