Poly(Lactic Acid) Filled with Cassava Starch‐g‐Soybean Oil Maleate

Kiangkitiwan, Nopparut; Srikulkit, Kawee

doi:10.1155/2013/860487

Cited by 12 publications

(5 citation statements)

References 10 publications

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“…Increasing screw speed decreases reaction time, but also results in increased mixing in the extruder, which is in good agreement with previous work [46]. The interaction term of MA content and screw speed has a negative effect on melt processing [47]. The square effects on elongation are shown in terms of MA content ( X 2 ) and screw speed level ( X 3 ).…”

Section: Resultssupporting

confidence: 89%

Optimization of Extrusion Variables and Maleic Anhydride Content on Biopolymer Blends Based on Poly(hydroxybutyrate-co-hydroxyvalerate)/Poly(vinyl acetate) with Tapioca Starch

Lui

Peng

2018

Polymers

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Poly(3-hyroxybutyrate-co-3-hydroxyvalerate) (PHBV), poly(vinyl acetate) (PVAc), and tapioca starch are environment-friendly materials. The present study used these materials to produce biodegradable plastic pellets by melt extrusion. The tapioca starch content of composite formulations, the maleic anhydride content, and the screw speed of the extruder were chosen as variables for the extrusion process. A Box-Behnken response surface design was used to establish mathematical models to predict the relationship between the operating variables and the objective attributes (tensile strength, elongation at break, and water absorption) of the blends. Blend morphology was also assessed. The regression coefficients revealed that the extrusion parameters most significantly affecting extrudate responses were tapioca starch content and maleic anhydride content, both showing significant (p < 0.01) linear effects. The results of the analysis of variance found the models are in good agreement with experimental results as informed by high correlation coefficients (R2 > 0.9), with no significant lack of fit. From the numerical analysis, optimized operating variables (20.13% tapioca starch content, 10.14% maleic anhydride content, and a screw speed of 41.3 rpm) produced a product with optimum values of 16.4 MPa tensile strength, 13.2% elongation at break, and 30.94% water absorption.

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Section: Resultssupporting

confidence: 89%

Optimization of Extrusion Variables and Maleic Anhydride Content on Biopolymer Blends Based on Poly(hydroxybutyrate-co-hydroxyvalerate)/Poly(vinyl acetate) with Tapioca Starch

Lui

Peng

2018

Polymers

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“…The mass loss stage between 160 and 230 °C shows the contribution of the glycerol degradation, which occurs in this temperature range. The increase of this peak with the increase of glycerol content supports this statement.…”

Section: Resultsmentioning

confidence: 97%

Biobased polymer films from avocado oil extraction residue: Production and characterization

Santos

Pagno

Costa

et al. 2016

J of Applied Polymer Sci

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In view of the increasing interest in the use of residues from the food industry as source for packing applications, the by‐product of the mechanical extraction of avocado oil is an attractive product as it consists basically a hydrated and defatted pulp, rich in proteins, fibers. and oil. This work aims to produce biobased polymer films from avocado oil extraction residue. Seven film‐forming solutions were elaborated from puree and the additives tested were glycerol, cassava starch, and microcrystalline cellulose. The films obtained from the pure residue presented brittle behavior. All films presented low values of water vapor permeability (0.064 to 0.446 g mm m−2·kPa−1 h−1) and medium water soluble fraction (43.79 to 56.92%). The films with cassava starch and glycerol presented the best results, with mechanical (tensile: 2.70 MPa; elongation: 13.7%) and thermal properties in the range typically found in the literature for biobased films. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43957.

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“…Generally, the impact strength of neat PLA has been reported to increase with chitin and reduce with starch content above 10% due to incompatibility with PLA [33]. Minimal work has been reported on the impact strength from a blend of 10% chitin/starch with PLA.…”

Section: Tensile Propertiesmentioning

confidence: 99%

The Role of Two-Step Blending in the Properties of Starch/Chitin/Polylactic Acid Biodegradable Composites for Biomedical Applications

et al. 2020

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The current research trend for excellent miscibility in polymer mixing is the use of plasticizers. The use of most plasticizers usually has some negative effects on the mechanical properties of the resulting composite and can sometimes make it toxic, which makes such polymers unsuitable for biomedical applications. This research focuses on the improvement of the miscibility of polymer composites using two-step mixing with a rheomixer and a mix extruder. Polylactic acid (PLA), chitin, and starch were produced after two-step mixing, using a compression molding method with decreasing composition variation (between 8% to 2%) of chitin and increasing starch content. A dynamic mechanical analysis (DMA) was used to study the mechanical behavior of the composite at various temperatures. The tensile strength, yield, elastic modulus, impact, morphology, and compatibility properties were also studied. The DMA results showed a glass transition temperature range of 50 °C to 100 °C for all samples, with a distinct peak value for the loss modulus and factor. The single distinct peak value meant the polymer blend was compatible. The storage and loss modulus increased with an increase in blending, while the loss factor decreased, indicating excellent compatibility and miscibility of the composite components. The mechanical properties of the samples improved compared to neat PLA. Small voids and immiscibility were noticed in the scanning electron microscopy images, and this was corroborated by X-ray diffraction graphs that showed an improvement in the crystalline nature of PLA with starch. Bioabsorption and toxicity tests showed compatibility with the rat system, which is similar to the human system.

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Poly(Lactic Acid) Filled with Cassava Starch‐g‐Soybean Oil Maleate

Cited by 12 publications

References 10 publications

Optimization of Extrusion Variables and Maleic Anhydride Content on Biopolymer Blends Based on Poly(hydroxybutyrate-co-hydroxyvalerate)/Poly(vinyl acetate) with Tapioca Starch

Optimization of Extrusion Variables and Maleic Anhydride Content on Biopolymer Blends Based on Poly(hydroxybutyrate-co-hydroxyvalerate)/Poly(vinyl acetate) with Tapioca Starch

Biobased polymer films from avocado oil extraction residue: Production and characterization

The Role of Two-Step Blending in the Properties of Starch/Chitin/Polylactic Acid Biodegradable Composites for Biomedical Applications

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