Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/261
Título: | Mechanical, dynamic-mechanical, and thermal properties of soy protein-based thermoplastics with potential biomedical applications |
Autor(es): | Vaz, Cláudia M. Mano, J. F. Fossen, M. Tuil, R. F. van Graaf, L. A. de Reis, R. L. Cunha, A. M. |
Palavras-chave: | Thermoplastic proteins Injection molding Dynamic-mechanical analysis Biomaterials |
Data: | 2002 |
Editora: | Marcel Dekker |
Revista: | Journal of Macromolecular Science Part B Physics |
Citação: | "Journal of Macromolecular Science : Physics". 41:1 (2002) 33-46. |
Resumo(s): | In this study the tensile and the dynamic-mechanical behavior of injection-molded samples of various soy protein thermoplastic compounds were evaluated as a function of the amount of glycerol, type and amount of ceramic reinforcement, and eventual incorporation of coupling agents. The incorporation of glycerol into a soy-based matrix resulted in its plasticization, as confirmed by the drop in stiffness (storage and elastic modulus) above 20°C and a decrease in the protein glass transition temperature. Differential scanning calorimetric thermograms proved the occurrence of conformational changes in the soy protein during processing. Furthermore, the developed soy protein-based thermoplastics showed a thermal stability up to 100°C, as confirmed by thermogravimetric analysis. The reinforcement of the soy protein matrix with a ceramic filler (tricalcium phosphate) was shown to be effective for amounts above 10% w/w. The introduction of an amino-coupling agent led to a plasticizing effect, detected in the mechanical and dynamic-mechanical properties of the resulting materials. The results also show a good qualitative agreement between the properties obtained from quasi-static and dynamic experiments. The materials present a range of properties that might allow for their use eventually in a range of biomedical applications. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/261 |
DOI: | 10.1081/MB-120002344 |
ISSN: | 0022-2348 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | 3B’s - Artigos em revistas/Papers in scientific journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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CMV_DMASoy_JMS2992.pdf Acesso restrito! | 23,52 MB | Adobe PDF | Ver/Abrir |