| Full text | |
| Author(s): |
Nossa, Tamires S.
[1, 2]
;
Belgacem, Naceur M.
[2]
;
Gandini, Alessandro
[1, 3]
;
Carvalho, Antonio J. F.
[1]
Total Authors: 4
|
| Affiliation: | [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
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Polymer International; v. 64, n. 10, p. 1366-1372, OCT 2015. |
| Web of Science Citations: | 7 |
| Abstract | |
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) | |
| FAPESP's process: | 10/20155-0 - Blends of Thermoplastic Starch Modified by Reactive Extrusion |
| Grantee: | Tamires de Souza Nossa |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 12/04688-4 - Thermoplastic starch with Thermo-reversible cross-linking |
| Grantee: | Tamires de Souza Nossa |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |