Blends of Thermoplastic Starch Modified by Reactive Extrusion
Effect of the molecular architecture of poly(ε-caprolactone-b-ethylene glycol) mul...
A new process for preparation of thermoplastic blends with high polar polymers
| Full text | |
| Author(s): |
Carmona, Vitor Brait
[1, 2]
;
Correa, Ana Carolina
[1]
;
Marconcini, Jose Manoel
[1]
;
Capparelli Mattoso, Luis Henrique
[1]
Total Authors: 4
|
| Affiliation: | [1] Embrapa Instrumentat, Natl Lab Nanotechnol Agribusiness LNNA, BR-13560970 Sao Carlos, SP - Brazil
[2] Fed Univ Sao Carlos UFSCar, Grad Program Mat Sci & Engn PPG CEM, Sao Carlos, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 23, n. 1, p. 83-89, MAR 2015. |
| Web of Science Citations: | 28 |
| Abstract | |
Biodegradable ternary blends of thermoplastic starch (TPS), poly(epsilon-caprolactone) (PCL) and poly(lactic acid) (PLA) were prepared by one-step extrusion based on the complementary mechanical properties between both ductile PCL and rigid PLA and also low cost TPS. TPS/PCL/PLA blend was prepared using equal mass fraction of each component and presented as an incompatible material. We then evaluated the addition of citric acid, maleic anhydride and methylene diphenyl diisocyanate (MDI) as compatibilizing agents in the ternary blend. They did not significantly affect thermal stabilities of the ternary blends but induced PCL and PLA crystallization. Adding 2 wt% of MDI caused an increase in melt viscosity of the ternary blend suggesting that urethane linkages were formed with TPS and it also was efficient in order to obtain notable improvements in tensile strength and ductility of the ternary blend. (AU) | |
| FAPESP's process: | 08/08264-9 - Study of the degradation of biodegradable polymers by light, heat and microorganisms in composted soil |
| Grantee: | Adriana de Campos Pastre |
| Support Opportunities: | Scholarships in Brazil - Post-Doctorate |