The impact of morphology on thermal properties and aerobic biodegradation of physically compatibilized poly (lactic acid)/co-plasticized thermoplastic starch blends

2018 ◽  
Vol 29 (12) ◽  
pp. 2880-2889 ◽  
Author(s):  
Mohsen Esmaeili ◽  
Gholamreza Pircheraghi ◽  
Reza Bagheri ◽  
Volker Altstädt
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Thermoplastic Starch ◽  
Aerobic Biodegradation ◽  
Poly Lactic Acid ◽  
Starch Blends ◽  
The Impact

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 A study on the mechanical, thermal properties and crystallization behavior of poly(lactic acid)/thermoplastic poly(propylene carbonate) polyurethane blends

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46183-46194 ◽  
Author(s):  
Jia Yang ◽  
Hongwei Pan ◽  
Xin Li ◽  
Shulin Sun ◽  
Huiliang Zhang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Impact Strength ◽  
Propylene Carbonate ◽  
Crystallization Behavior ◽  
Raw Materials ◽  
Poly Lactic Acid ◽  
Elongation At Break ◽  
Poly Propylene ◽  
The Impact

PPCU was prepared by using PPC and polyols as the raw materials and diphenyl-methane-diisocyanate (MDI) as the extender chain. The impact strength and elongation at break of PLA were remarkably enhanced by blending with PPCU.

Improvement of Poly(Lactic Acid) Properties by Using Acrylonitrile-Butadiene Rubber and Polyethylene-g-Maleic Anhydride

2019 ◽  
Vol 972 ◽  
pp. 178-184
Author(s):  
Sirirat Wacharawichanant ◽  
Chawisa Wisuttrakarn ◽  
Kasana Chomphunoi ◽  
Manop Phankokkruad
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Maleic Anhydride ◽  
Thermal Degradation ◽  
Impact Strength ◽  
Mass Loss ◽  
Poly Lactic Acid ◽  
Butadiene Rubber ◽  
Acrylonitrile Butadiene Rubber ◽  
The Impact

This research prepared poly(lactic acid) (PLA) and PLA/acrylonitrile-butadiene rubber (NBR) blends before and after adding polyethylene-g-maleic anhydride with 3 wt% of maleic anhydride (PE-g-MA3) 3 phr. The effects of NBR and PE-g-MA3 on morphological, mechanical and thermal properties of PLA and PLA blends were discussed. The morphological analysis observed the two-phase morphology of PLA/NBR blends, and it was observed the cavities generated due to NBR phase detachment during sample fracture, and droplets of NBR phase at higher NBR content. The PE-g-MA3 addition could improve adhesion between PLA and NBR phases due to the decrease of cavities in PLA matrix and droplet size of NBR. The mechanical properties showed the impact strength and strain at break of PLA/NBR blends dramatically increased when the amount of NBR increasing. The addition of PE-g-MA3 significantly improved the impact strength of PLA/NBR blends. The thermal properties showed the NBR addition had effect slightly on the melting temperature of PLA/NBR blends. The filling of NBR and PE-g-MA3 greatly decreased the percent crystallinity of PLA more than two times. The thermal degradation of pure PLA and NBR proceeds by one step, while the thermal degradation process of PLA/NBR and PLA/PE-g-MA3 proceeds by two steps. Which the first step showed a large mass loss of PLA degradation and the second step showed a small mass loss of PE-g-MA and NBR degradation.

Compostability and Ecotoxicity of Poly(lactic acid) and Starch Blends

2012 ◽  
Vol 506 ◽  
pp. 323-326 ◽  
Author(s):  
Yositar Rudeekit ◽  
Pongsaks Siriyota ◽  
Parichai Intaraksa ◽  
P. Chaiwutthinan ◽  
Monchait Tajan ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Plant Growth ◽  
Visual Inspection ◽  
Aerobic Biodegradation ◽  
Poly Lactic Acid ◽  
Ecotoxicity Test ◽  
Testing Conditions ◽  
Positive Material ◽  
Starch Blends

This paper revealed the compostability of poly (lactic acid) (PLA) and PLA/starch blends with various amounts of starch contents. The results showed that the ultimate aerobic biodegradation under controlled composting conditions of PLA and PLA/starch with 30, 50 and 70 wt% starch contents were 83.43%, 84.28%, 88.04% and 95.83%, respectively. Under the same testing conditions, the biodegradation of cellulose, as a positive material, was 84.89%. In the disintegration testing, the tested materials were completely biodegraded and no residuals were observed through visual inspection after 30 days. In ecotoxicity test, the rate of germination and plant growth of monocotyledon and dicotyledon on the resulting compost were no significant different when compared to blank compost under. It can be concluded that the PLA and PLA/starch blends were clearly safe for the ecosystem. Furthermore, these materials were biodegradable and compostable materials as they pass all requirements of ISO 17088.

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.

Effects of Processing Parameters and Nanofillers on Mechanical and Thermal Properties and Morphology of Impact Modified Poly (lactic acid)

2013 ◽  
Vol 1499 ◽  
Author(s):  
Eda Acik ◽  
Ulku Yilmazer
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Thermal Properties ◽  
Impact Strength ◽  
Random Copolymer ◽  
Processing Parameters ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Injection Molded ◽  
The Impact

ABSTRACTTernary nanocomposites of poly (lactic acid) (PLA) were produced by melt blending with two types of elastomers and five types of organoclays to obtain improved mechanical properties such as tensile strength, modulus and impact strength. One of the elastomers is a random copolymer of ethylene and glycidyl methacrylate (E-GMA) and the other one is a random terpolymer of ethylene-butyl acrylate-maleic anhydride (E-BA-MAH). Organically modified montmorillonites (OMMT) were utilized as nanofillers. XRD, DSC, tensile and impact tests were done on the injection molded samples. FTIR, SEM and TEM analyses are still in progress. As preliminary results, thermal analysis showed that the addition of compatibilizers and organoclays does not have a distinct effect on the thermal properties of the composites, and no evidence of nucleation activity of compatibilizers or organoclays was found. For all types of organoclays, the nanocomposites produced with E-GMA exhibited better mechanical properties in comparison to nanocomposites containing E-BA-MAH, especially for the impact strength.

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.

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