Preparation of modified starch-grafted poly(lactic acid) and a study on compatibilizing efficacy of the copolymers in poly(lactic acid)/thermoplastic starch blends

2012 ◽  
Vol 126 (S1) ◽  
pp. E389-E396 ◽  
Author(s):  
J. Wootthikanokkhan ◽  
P. Kasemwananimit ◽  
N. Sombatsompop ◽  
A. Kositchaiyong ◽  
S. Isarankura na Ayutthaya ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Modified Starch ◽  
Starch Blends

Poly(Ethylene Glycol) as a Compatibilizer for Poly(Lactic Acid)/Thermoplastic Starch Blends

2012 ◽  
Vol 21 (1) ◽  
pp. 151-159 ◽  
Author(s):  
Márcia Maria Favaro Ferrarezi ◽  
Márcia de Oliveira Taipina ◽  
Laura Caetano Escobar da Silva ◽  
Maria do Carmo Gonçalves
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Starch Blends ◽  
Poly Ethylene

Effect of blending conditions on mechanical, thermal, and rheological properties of plasticized poly(lactic acid)/maleated thermoplastic starch blends

2011 ◽  
Vol 124 (2) ◽  
pp. 1012-1019 ◽  
Author(s):  
J. Wootthikanokkhan ◽  
N. Wongta ◽  
N. Sombatsompop ◽  
A. Kositchaiyong ◽  
J. Wong-On ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Rheological Properties ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Starch Blends

Mechanical Properties of Poly(lactic acid) / Thermoplastic Starch Blends Crosslinked by Gamma Radiation

2013 ◽  
Vol 781-784 ◽  
pp. 467-470 ◽  
Author(s):  
Siriruck Kalapakdee ◽  
Thirawudh Pongprayoon ◽  
Kasinee Hemvichian ◽  
Phiriyatorn Suwanmala ◽  
Wararat Kangsumrith
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Gamma Radiation ◽  
Crosslinking Agent ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Optimum Dose ◽  
Gel Fraction ◽  
Twin Screw ◽  
Starch Blends

This research aims to determine the influences of radiation-induced crosslinking on the mechanical properties of polymer blends between poly (lactic acid) (PLA) and thermoplastic starch (TPS). PLA and TPS were mixed at different ratios (90:10, 80:20, 70:30, 60:40) in the presence of a crosslinking agent using a twin screw extruder. The blends were compression molded into films. The film samples were irradiated by gamma radiation at different doses. Gel fraction was used to determine crosslinking efficiency. Results showed that gamma radiation was able to induce crosslinking for PLA/TPS blends. The gel fraction and mechanical properties decreased with increasing TPS content. The optimum ratio of PLA:TPS with the maximum gel fraction and mechanical properties was 90:10 and the optimum dose was 40 kGy by gamma radiation.

scholarly journals Mechanical, Morphological and Thermal Characterization of Compatibilized Poly(lactic acid)/Thermoplastic Starch Blends

2020 ◽  
Vol 13 (1) ◽  
pp. 1-13
Author(s):  
László Lendvai ◽  
Dávid Brenn
Keyword(s):  
Lactic Acid ◽  
Interfacial Adhesion ◽  
Thermal Characterization ◽  
Thermoplastic Starch ◽  
Chain Extender ◽  
Coupling Agents ◽  
Poly Lactic Acid ◽  
Binary Blends ◽  
Starch Blends

A two-step compounding procedure was used to produce binary blends composed of poly(lactic acid) (PLA)  and thermoplastic starch (TPS) with varying component ratios. Subsequently, three different chemical connectors were introduced in order to enhance the interfacial adhesion between the PLA and the TPS. Maleic anhydride, blocked isocyanate, and chain extender were used as coupling agents. Mechanical, morphological and thermal properties of PLA/TPS blends were determined. It was revealed that the initial interfacial adhesion between the components is weak. Out of the three coupling agents introduced, the chain extender proved to be the most effective, however, the improvement achieved in the mechanical properties was still marginal. According to the thermogravimetric analysis thermal stability was not significantly affected by any of the coupling agents.

Mechanical, Thermal, and Morphological Properties of Thermoplastic Starch/Poly(lactic acid/Poly(butylene adipate-co-terephthalate) Blends

2014 ◽  
Vol 970 ◽  
pp. 312-316
Author(s):  
Sujaree Tachaphiboonsap ◽  
Kasama Jarukumjorn
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Interfacial Adhesion ◽  
Tensile Modulus ◽  
Thermoplastic Starch ◽  
Morphological Properties ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Elongation At Break ◽  
Blending Method

Thermoplastic starch (TPS)/poly (lactic acid) (PLA) blend and thermoplastic starch (TPS)/poly (lactic acid) (PLA)/poly (butylene adipate-co-terephthalate) (PBAT) blend were prepared by melt blending method. PLA grafted with maleic anhydride (PLA-g-MA) was used as a compatibilizer to improve the compatibility of the blends. As TPS was incorporated into PLA, elongation at break was increased while tensile strength, tensile modulus, and impact strength were decreased. Tensile properties and impact properties of TPS/PLA blend were improved with adding PLA-g-MA indicating the enhancement of interfacial adhesion between PLA and TPS. With increasing PBAT content, elongation at break and impact strength of TPS/PLA blends were improved. The addition of TPS decreased glass transition temperature (Tg), crystallization temperature (Tc), and melting temperature (Tm) of PLA. Tgand Tcof TPS/PLA blend were decreased by incorporating PLA-g-MA. However, the presence of PBAT reduced Tcof TPS/PLA blend. Thermal properties of TPS/PLA/PBAT blends did not change with increasing PBAT content. SEM micrographs revealed that the compatibilized TPS/PLA blends exhibited finer morphology when compared to the uncompatibilized TPS/PLA blend.

Biological Oxidative Mechanisms for Degradation of Poly(lactic acid) Blended with Thermoplastic Starch

2015 ◽  
Vol 3 (11) ◽  
pp. 2756-2766 ◽  
Author(s):  
Carlos A. Rodrigues ◽  
Aryane Tofanello ◽  
Iseli L. Nantes ◽  
Derval S. Rosa
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid

Enhancing compatibility between poly(lactic acid) and thermoplastic starch using admicellar polymerization

2016 ◽  
Vol 133 (31) ◽  
Author(s):  
Kasinee Hemvichian ◽  
Phiriyatorn Suwanmala ◽  
Wararat Kangsumrith ◽  
Prapanee Sudcha ◽  
Kamonnit Inchoto ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Admicellar Polymerization
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