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

Hemvichian, Kasinee; Suwanmala, Phiriyatorn; Kangsumrith, Wararat; Sudcha, Prapanee; Inchoto, Kamonnit; Pongprayoon, Thirawudh; Güven, Olgun

doi:10.1002/app.43755

Cited by 15 publications

(10 citation statements)

References 33 publications

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“…The increase in the strength of the blend could be linked to the compatibility and miscibility of the polymer blend, which was confirmed by the DMA results. The same increasing trend in the tensile and yield strength values has been reported in the literature [28,29]. The tensile strength of the PLA/chitin/starch (A3 to A5) was in the range of material used for the tissue repair of cancellous/trabecular bone [30].…”

Section: Tensile Propertiessupporting

confidence: 70%

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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Section: Tensile Propertiessupporting

confidence: 70%

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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“…Furthermore, it is well known that PLA and starch are incompatible since the former is hydrophobic and the latter is hydrophilic. Various techniques and methods have been developed to improve the interface between hydrophobic PLA and hydrophilic starch, including grafting hydrophilic group (maleic anhydrate) on PLA surface; or grafting hydrophobic groups on starches, and crosslinking between PLA and starch with methylenediphenyl diisocyanate (MDI), etc. However, there is no commercial product available in the market using these techniques, mainly because of high cost (such as grafting reaction) or toxic concern (such as treatment with MDI or other crosslinking agents, etc.…”

Section: Introductionmentioning

confidence: 99%

Poly(lactic acid)/starch composites: Effect of microstructure and morphology of starch granules on performance

Khalid

Meng

Liu

et al. 2017

J of Applied Polymer Sci

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Starches used to develop biodegradable composites belong to different botanical sources that exhibit different microstructures and morphologies. This results in confused relationship and no comparison of data for applications. In this work, the most popular ten different starches were used as model materials to investigate the relationship between starch microstructure and the performance of poly(lactic acid) (PLA)/starch composites. It was found that: (a) composites filled with either well‐sized (small‐sized and non‐agglomerated) starch granules or those containing high amylose content (G‐50 and G‐80) improves the reinforcing ability of PLA, with least reduction in deformation; (b) aggregation tendency of small‐sized starch granules can be controlled using surface modification approach that not only reduces the phase‐separation between starch and PLA but also improves the dispersion; and (c) no discernible relationship exists between the starches, from different botanical sources, and the thermal performance of PLA/starch composites. The results provide practical guidelines to develop starch‐based biodegradable composites for commercial applications. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45504.

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“…The prospect of using ionizing radiation in nanotechnology is not limited to the applications mentioned in this review but will diversify to include the preparation of monoliths [65] for chromatographic applications, controlling of cavity size in molecularly imprinted polymer matrices [66], etc. There is also room to use ionizing radiation to impart compatibility to otherwise incompatible systems by radiation-induced admiscellar polymerization [67] hence deposition of very thin polymer films on hydrophopic or hydrophilic surfaces.…”

Section: Discussionmentioning

confidence: 99%

Ionizing radiation: a versatile tool for nanostructuring of polymers

Güven

2016

Pure and Applied Chemistry

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Very high energies of particulate (accelerated electrons, swift heavy ions) or electromagnetic wave (γ-, X-rays) radiation can be used to initiate free radical based reactions in solids, liquids or gases. Because of non-selectivity of absorption of X-rays, γ rays and accelerated electrons in matter free radicals are generated homogeneously in the bulk material. These free radicals on the polymers or monomers are used extensively in the synthesis and modification of polymeric materials. The unique properties of ionizing radiation make it a very useful tool in the top-down and bottom-up synthesis of nanomaterials. In this article the utilization of ionizing radiation in the form of swift heavy ions, accelerated electrons, X- and γ rays will be described for development of advanced materials by radiation-induced grafting in nanoscale, synthesis of polymeric nanoparticles, radiation-assisted synthesis of nanogels and nanocomposites. The properties difficult to be attained by other techniques will be described by giving examples for the cases of ion track-etched membranes, fuel cell membranes, sensors, detectors, cell culture media, polymer thin films embedded with metal nanoparticles, polymer/clay nanocomposites with a prospect for the future outlook.

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

Cited by 15 publications

References 33 publications

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

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

Poly(lactic acid)/starch composites: Effect of microstructure and morphology of starch granules on performance

Ionizing radiation: a versatile tool for nanostructuring of polymers

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