scholarly journals Kinetic Analysis of Poly(ε-caprolactone)/poly(lactic acid) Blends with Low-cost Natural Thermoplastic Starch

2020 ◽  
Vol 67 (2) ◽  
pp. 651-665
Author(s):  
Vesna Ocelić Bulatović ◽  
Miće Jakić ◽  
Dajana Kučić Grgić
Keyword(s):  
Lactic Acid ◽  
Kinetic Analysis ◽  
Low Cost ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid

Toughness and Compatibility Improvement of Thermoplastic Starch/Poly(lactic Acid) Blends

2013 ◽  
Vol 747 ◽  
pp. 67-71 ◽  
Author(s):  
Sujaree Tachaphiboonsap ◽  
Kasama Jarukumjorn
Keyword(s):  
Lactic Acid ◽  
Renewable Resources ◽  
Low Cost ◽  
High Strength ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
High Modulus ◽  
Immiscible Blend ◽  
Internal Mixer ◽  
Cost Limit

Poly (lactic acid) (PLA), produced from renewable resources, is one of the most widely used biodegradable polymers. PLA has high strength and high modulus. However, its brittleness and high cost limit its application. Starch has been used as filler for environmental friendly polymers due to its low cost, biodegradable, and availability as a renewable source. Thermoplastic starch (TPS) is a biodegradable material based on starch. Incorporation of TPS into PLA matrix can reduce material cost and increases its biodegradation rate. However, PLA and TPS form immiscible blend leading to poor mechanical properties of the blend. The compatibility of the blend can be improved by adding compatibilizers. Moreover, in order to improve toughness of the TPS/PLA blend, poly (butylenes adipate-co-terephthalate) (PBAT), is introduced into the blend. In this study, PLA/TPS blends are prepared using an internal mixer and test specimens are molded using a compression molding. TPS is obtained from cassava starch and glycerol at ratio of 70/30 wt%. The ratio of TPS/PLA blend is 10/90 wt%. Poly (lactic acid) grafted maleic anhydride (PLA-g-MA) is used as a compatibilizer at contents of 3, 5, and 7 phr. PBAT content is 10 wt%. Mechanical, morphological, and thermal properties of the blends are investigated.

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

Adipate and Citrate Esters as Plasticizers for Poly(Lactic Acid)/Thermoplastic Starch Sheets

2014 ◽  
Vol 23 (1) ◽  
pp. 54-61 ◽  
Author(s):  
Marianne Ayumi Shirai ◽  
Carmen Maria Olivera Müller ◽  
Maria Victória Eiras Grossmann ◽  
Fabio Yamashita
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid

Properties and Biodegradation of Thermoplastic Starch Obtained from Grafted Starches with Poly(lactic acid)

2019 ◽  
Vol 27 (11) ◽  
pp. 2607-2617 ◽  
Author(s):  
Z. B. Cuevas-Carballo ◽  
S. Duarte-Aranda ◽  
G. Canché-Escamilla
Keyword(s):  
Lactic Acid ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid
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