| Texto completo | |
| 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 |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/04688-4 - Amido termoplástico com reticulação termorreversível |
| Beneficiário: | Tamires de Souza Nossa |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |