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.

Preparation and Characterization of Poly(Lactic Acid)-g-Maleic Anhydride + Starch Blends

2009 ◽  
Vol 277 (1) ◽  
pp. 69-80 ◽  
Author(s):  
Victor H. Orozco ◽  
Witold Brostow ◽  
Wunpen Chonkaew ◽  
Betty L. López
Keyword(s):  
Lactic Acid ◽  
Maleic Anhydride ◽  
Poly Lactic Acid ◽  
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

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

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

scholarly journals Water Absorption and Thermomechanical Characterization of Extruded Starch/Poly(lactic acid)/Agave Bagasse Fiber Bioplastic Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
F. J. Aranda-García ◽  
R. González-Núñez ◽  
C. F. Jasso-Gastinel ◽  
E. Mendizábal
Keyword(s):  
Lactic Acid ◽  
Water Absorption ◽  
Impact Resistance ◽  
Thermoplastic Starch ◽  
Thermomechanical Behavior ◽  
Poly Lactic Acid ◽  
Content Increase ◽  
Fiber Fracture ◽  
Bagasse Fiber

Water absorption and thermomechanical behavior of composites based on thermoplastic starch (TPS) are presented in this work, wherein the concentration of agave bagasse fibers (ABF, 0–15 wt%) and poly(lactic acid) (PLA, 0–30 wt%) is varied. Glycerol (G) is used as starch (S) plasticizer to form TPS. Starch stands as the polymer matrix (70/30 wt/wt, S/G). The results show that TPS hygroscopicity decreases as PLA and fiber content increase. Storage, stress-strain, and flexural moduli increase with PLA and/or agave bagasse fibers (ABF) content while impact resistance decreases. The TPS glass transition temperature increases with ABF content and decreases with PLA content. Micrographs of the studied biocomposites show a stratified brittle surface with a rigid fiber fracture.

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.

Morphological, Mechanical, and Thermal Characterization of Poly(Lactic Acid)/Cellulose Multifilament Fibers Prepared by Melt Spinning

2016 ◽  
Vol 37 (4) ◽  
pp. 1193-1205 ◽  
Author(s):  
Tassadit Aouat ◽  
Mustapha Kaci ◽  
Eric Devaux ◽  
Christine Campagne ◽  
Aurélie Cayla ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Melt Spinning ◽  
Thermal Characterization ◽  
Poly Lactic Acid

scholarly journals In Vitro Characterization of Poly(Lactic Acid)/ Poly(Hydroxybutyrate)/ Thermoplastic Starch Blends for Tissue Engineering Application

2021 ◽  
Vol 30 ◽  
pp. 096368972110210
Author(s):  
Martina Culenova ◽  
Ivana Birova ◽  
Pavol Alexy ◽  
Paulina Galfyova ◽  
Andreas Nicodemou ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Lactic Acid ◽  
Thermoplastic Starch ◽  
Biological Behavior ◽  
Poly Lactic Acid ◽  
Cytotoxicity Test ◽  
In Vitro Characterization ◽  
Custom Made

Complex in vitro characterization of a blended material based on Poly(Lactic Acid), Poly(Hydroxybutyrate), and Thermoplastic Starch (PLA/PHB/TPS) was performed in order to evaluate its potential for application in the field of tissue engineering. We focused on the biological behavior of the material as well as its mechanical and morphological properties. We also focused on the potential of the blend to be processed by the 3D printer which would allow the fabrication of the custom-made scaffold. Several blends recipes were prepared and characterized. This material was then studied in the context of scaffold fabrication. Scaffold porosity, wettability, and cell-scaffold interaction were evaluated as well. MTT test and the direct contact cytotoxicity test were applied in order to evaluate the toxic potential of the blended material. Biocompatibility studies were performed on the human chondrocytes. According to our results, we assume that material had no toxic effect on the cell culture and therefore could be considered as biocompatible. Moreover, PLA/PHB/TPS blend is applicable for 3D printing. Printed scaffolds had highly porous morphology and were able to absorb water as well. In addition, cells could adhere and proliferate on the scaffold surface. We conclude that this blend has potential for scaffold engineering.

Thermal Characterization of Biodegradable Poly (Lactic Acid)/Clay Nanocomposites

2009 ◽  
pp. 219-225 ◽  
Author(s):  
Parakalan Krishnamachari ◽  
Jian Zhang ◽  
Jizhong Yan ◽  
Abolghasem Shahbazi ◽  
Leonard Uitenham ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermal Characterization ◽  
Poly Lactic Acid ◽  
Clay Nanocomposites ◽  
Biodegradable Poly
Sign in / Sign up

Export Citation Format

Share Document