Heat-counteracted strategy for tailoring the cell structure and properties of sustainable poly(butylene succinate) foams
| Autor: | Changhua Liu, Xiao-Zhou Ma, Lin Gan, Dong Wang, Junfeng Yue, Jin Huang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Exothermic reaction
Materials science Polymers and Plastics Flexural modulus Organic Chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Endothermic process Decomposition 0104 chemical sciences Polybutylene succinate chemistry.chemical_compound Thermal conductivity Azodicarbonamide chemistry Flexural strength Chemical engineering Materials Chemistry 0210 nano-technology |
| Zdroj: | Polymer. 155:50-57 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2018.09.029 |
| Popis: | Sustainable poly(butylene succinate) (PBS) with low melt strength suffered serious heat-release from azodicarbonamide (AC) during foaming process, resulting in cell collapse and low properties. Herein, a heat-counteracted strategy was developed to counteract the exothermic effect from AC decomposition by utilizing the endothermic effect of endothermic expandable microspheres (EnEMs). During the foaming process of PBS, the heat release from AC was tailored by optimizing the EnEMs/AC loading ratio and related theoretical calculation was established. The closed-cell fraction of PBS foams was improved from 21% to almost 100%. The thermal conductivity of PBS foams decreased from 58 to 22 mW/(m·K). In addition, the flexural strength was enhanced from 3 to 21 MPa and the flexural modulus from 106 to 278 MPa. This strategy was verified to be feasible in theory and practice. |
| Databáze: | OpenAIRE |
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