Mechanical properties, thermal stability, and crystallization kinetics of poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/calcium carbonate composites
| Autor: | Kaitian Xu, Yongchao Ding, Cui Shujun, Yaya Yang, Jianyun He |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Polymers and Plastics Concentration effect Izod impact strength test General Chemistry chemistry.chemical_compound Crystallinity Calcium carbonate chemistry Ultimate tensile strength Materials Chemistry Ceramics and Composites Thermal stability Composite material Elongation Elastic modulus |
| Zdroj: | Polymer Composites. 32:1134-1142 |
| ISSN: | 0272-8397 |
| DOI: | 10.1002/pc.21131 |
| Popis: | Bacterial polyester poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) containing 5 mol% 4HB was composited with different calcium carbonate (CaCO3) 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/CaCO3 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-CaCO3, 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. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers |
| Databáze: | OpenAIRE |
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