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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Thermoreversible crosslinked thermoplastic starch

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Autor(es):
Nossa, Tamires S. [1, 2] ; Belgacem, Naceur M. [2] ; Gandini, Alessandro [1, 3] ; Carvalho, Antonio J. F. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Mat Engn, BR-13566590 Sao Carlos, SP - Brazil
[2] INP Pagora, Inst Polytecn Grenoble, Lab Genie Procedes Papetiers, F-38402 St Martin Dheres - France
[3] Univ Sao Paulo, Chem Inst Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Polymer International; v. 64, n. 10, p. 1366-1372, OCT 2015.
Citações Web of Science: 7
Resumo

A novel furan-modified thermoreversible crosslinked thermoplastic starch was synthesized. The crosslinking mechanism was based on a thermoreversible furan/maleimide adduct formed by the Diels - Alder reaction. Thermoplastic starch (TPS) was first modified by forming a urethane linkage between the product of the reaction of furfuryl alcohol with 4,4-methylene diphenyldiisocyanate and a starch hydroxyl group. Crosslinking was then achieved by the addition of 1,1-(methylene-di-4,1-phenylene) bismaleimide to the furan-grafted starch in solution (dimethylsulfoxide) and in the molten state during conventional extrusion. The materials were characterized by Fourier transform infrared and H-1 NMR spectroscopy. The thermoreversible reaction was assessed by viscosity measurement and H-1 NMR, for the system in dimethylsulfoxide, and by solubility tests, hot-pressing experiments and dynamic mechanical analysis measurements for the extruded product. The crosslinked product showed a higher storage modulus and water resistance than its non-crosslinked counterpart, opening novel opportunities to widen the range of TPS applications. (c) 2015 Society of Chemical Industry (AU)

Processo FAPESP: 10/20155-0 - Blendas de Amido Termoplástico Modificado por Extrusão Reativa
Beneficiário:Tamires de Souza Nossa
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 12/04688-4 - Amido termoplástico com reticulação termorreversível
Beneficiário:Tamires de Souza Nossa
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado