Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
| Autor: | Suzan Aline Casarin, Maurício Pinheiro de Oliveira, Eliton S. Medeiros, Amélia S.F. Santos, Neymara C. Nepomuceno, Leonardo Fábio Rivas, José Augusto Marcondes Agnelli, Alcides de Oliveira Wanderley Neto, Marie Isabele Alencar, Antônio Marcos de Medeiros |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science PHB 02 engineering and technology Raw material engineering.material recycling 010402 general chemistry lcsh:Chemical technology 01 natural sciences Crystallinity biopolymer Ultimate tensile strength Chemical Engineering (miscellaneous) Thermal stability lcsh:TP1-1185 Fourier transform infrared spectroscopy Composite material reprocessing degradation Organic Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences engineering Extrusion Biopolymer 0210 nano-technology |
| Zdroj: | Polímeros, Volume: 27, Issue: 2, Pages: 122-128, Published: 29 JUN 2017 Polímeros v.27 n.2 2017 Polímeros (São Carlos. Online) Associação Brasileira de Polímeros (ABPol) instacron:ABPO Polímeros, Iss 0 Repositório Institucional da UNIFESP Universidade Federal de São Paulo (UNIFESP) instacron:UNIFESP |
| Popis: | National Foundation for Science and Technology Development (CNPq) Mechanical recycling of biodegradable plastics has to be encouraged, since the consumption of energy and raw materials can be reduced towards a sustainable development in plastics materials. In this study, the evolution of thermal and mechanical properties, as well as structural changes of poly(hydroxybutyrate) (PHB) up to three extrusion cycles were investigated. Results indicated a significant reduction in mechanical properties already at the second extrusion cycle, with a reduction above 50% in the third cycle. An increase in the crystallinity index was observed due to chemicrystallization process during degradation by chain scission. On the other hand, significant changes in the chemical structure or in thermal stability of PHB cannot be detected by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analyses (TGA), respectively. Univ Fed Rio Grande Norte UFRN, Dept Mat Engn DEMat, Natal, RN, Brazil Univ Fed Sao Carlos UFSCar, Dept Mat Engn DEMa, Sao Carlos, SP, Brazil Univ Fed Paraiba UFPB, Dept Mat Engn DEMAT, Joao Pessoa, Paraiba, Brazil Univ Fed Rio Grande Norte UFRN, Dept Chem DQ, Natal, RN, Brazil Univ Fed Sao Paulo UNIFESP, Inst Sci & Technol ICT, Sao Jose Dos Campos, SP, Brazil Univ Fed Sao Paulo UNIFESP, Inst Sci & Technol ICT, Sao Jose Dos Campos, SP, Brazil Web of Science |
| Databáze: | OpenAIRE |
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