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Journal articles on the topic 'Polylactic acid polymers'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Sreekumar, Kalyani, B. Bindhu, and K. Veluraja. "Perspectives of polylactic acid from structure to applications." Polymers from Renewable Resources 12, no. 1-2 (2021): 60–74. http://dx.doi.org/10.1177/20412479211008773.

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The demand for an adoption of renewable resources rather than finitely available non renewable sources for industrial purposes are rising, with the growing environmental constraints. Polymers being one of the crucial part of almost all the industries, pioneer in the list of sources needed for various applications. This makes polymers that can be obtained from renewable sources being studied widely and are anticipated to make a revolution in the field of packaging industry, medical field, and automobile industry. Polylactic acid (PLA) is one among such biopolymers, which is an aliphatic polyest

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2

Bhandari, Netra Lal, Ganesh Bhandari, Sunita Bista, Basant Pokhrel, Kabita Bist, and Kedar Nath Dhakal. "Degradation of fundamental polymers/plastics used in daily life: a review." BIBECHANA 18, no. 1 (2021): 240–53. http://dx.doi.org/10.3126/bibechana.v18i1.29619.

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Polymers are made from the monomers that are used for packaging purposes. The degradation of polymers can take place either abiotic or biotic pathways. Abiotic pathway occurs from thermal, photo-degradation, and catalytic methods whereas, biotic occurs in presence of different types of microorganisms. The degradation of polymers (polyethylene and polylactic acid) was explained by the thermal, catalytic, and biodegradation process. The thermal degradation of polyethylene and polylactic acid was explained by the thermogravimetric analysis (TGA) curve. Catalysts such as zeolites and amorphous sil

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3

Lunt, James, and Andrew L. Shafer. "Polylactic Acid Polymers from Com. Applications in the Textiles Industry." Journal of Industrial Textiles 29, no. 3 (2000): 191–205. http://dx.doi.org/10.1177/152808370002900304.

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Tables 10 and 11 summarize the key takeaways. Looking at the world of “Technical Textiles” (Table 12) it is clear that this unique spectrum of properties will allow PLA polymers to participate in a wider range of markets. In particular, in this segment, the unique combination of outstanding resistance to sunlight, resiliency, and elastic recovery offers potential for use in tents, patio umbrellas, and awnings. In addition, automotive applications requiring high moisture wicking and UV stability, such as seating will benefit from these materials. The high loft and resiliency offers promise in s

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4

Salehiyan, Reza, A. A. Yussuf, Nurul Fatin Hanani, Azman Hassan, and Abozar Akbari. "Polylactic acid/polycaprolactone nanocomposite." Journal of Elastomers & Plastics 47, no. 1 (2013): 69–87. http://dx.doi.org/10.1177/0095244313489906.

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5

Kumar Singh, Sanjay, Prashant Anthony, and Abhishek Chowdhury. "High Molecular Weight Poly(lactic acid) Synthesized with Apposite Catalytic Combination and Longer time." Oriental Journal of Chemistry 34, no. 4 (2018): 1984–90. http://dx.doi.org/10.13005/ojc/3404036.

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Biodegradable polymeric materials derived from renewable resources have attracted tremendous attention in different application. Polylactic acid (PLA) is one of the most useful biodegradable polymers. It is difficult to synthesize high molecular weight polylactic acid by direct polycondensation. The present work describes the synthesis of high molecular weight PLA by varying the duration of reaction and changing the sequence of catalyst addition. Binary catalyst used was SnCl2.2H2O/maleic anhydride and p-toluene sulfonic acid. PLA with molecular weight (6.503X105) was obtained in 50 hours. FTI

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6

Sahu, Govind, M. S. Rajput, and S. P. Mahapatra. "Effect of Calcium Phosphate on Tensile and Rheological Properties of Polylactic Acid (PLA)." Materials Science Forum 969 (August 2019): 404–8. http://dx.doi.org/10.4028/www.scientific.net/msf.969.404.

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From the last few decades, biodegradable composites have become best alternatives over the petro based polymer because these degrade in the simple compound in the natural environments. Among the available biodegradable polymers, polylactic acid (PLA) is more popular due to its biocompatibility and mechanical properties, that can be used in the biomedical application, such as sutures, bone and ligament fixation screws etc. In this study, synthesis of PLA was performed by ring opening polymerization and Calcium phosphate/Polylactic acid (PLA) bio-composites were prepared by melt mixing technique

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7

Malchikhina, Alena I., Evgeny N. Bolbasov, and Sergey I. Tverdokhlebov. "The Influence of Radio Frequency Magnetron Sputtering on Biodegradable Polymers Surface Properties." Advanced Materials Research 1040 (September 2014): 795–99. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.795.

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The paper investigated the modifying possibility of the biodegradable polymer materials surface (polylactic acid and polycaprolactone) in radio frequency discharge plasma, initiating hydroxyapatite solid target sputtering. It was demonstrated that discharge plasma treatment adjusts the surface properties of biodegradable polymers – surface free energy and the wetting angle. The disadvantage of biodegradable polymers, limiting their use in reconstructive medicine, is their hydrophobicity. The surface of biodegradable polymers becomes hydrophilic after modification.

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8

Peng, Qingyuan, Jingzhen Cheng, Shaorong Lu, and Yuqi Li. "Electrospun hyperbranched polylactic acid–modified cellulose nanocrystals/polylactic acid for shape memory membranes with high mechanical properties." Polymers for Advanced Technologies 31, no. 1 (2019): 15–24. http://dx.doi.org/10.1002/pat.4743.

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9

Kawashima, Nobuyuki. "A Development of Polylactic Acid as Bio-based Polymers." Journal of Synthetic Organic Chemistry, Japan 61, no. 5 (2003): 496–505. http://dx.doi.org/10.5059/yukigoseikyokaishi.61.496.

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10

Fang, Qi, and Milford A. Hanna. "Rheological properties of amorphous and semicrystalline polylactic acid polymers." Industrial Crops and Products 10, no. 1 (1999): 47–53. http://dx.doi.org/10.1016/s0926-6690(99)00009-6.

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11

Fukada, Eiichi. "Recent Topics of Ferroelectric Polymers-Polyurea and Polylactic Acid." Kobunshi 43, no. 3 (1994): 214–17. http://dx.doi.org/10.1295/kobunshi.43.214.

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12

Lada, Zoi G., Amaia Soto Beobide, Georgios N. Mathioudakis, and George A. Voyiatzis. "Fe(II) Spin Crossover/Polymer Hybrid Materials: Investigation of the SCO Behavior via Temperature-Dependent Raman Spectroscopy, Physicochemical Characterization and Migration Release Study." Molecules 26, no. 1 (2021): 201. http://dx.doi.org/10.3390/molecules26010201.

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Polymeric composites constitute an appealing class of materials with applications in various fields. Spin crossover (SCO) coordination complexes are switchable materials with potential use in data storage and sensors. Their incorporation into polymers can be considered an effective method for their wider practical application. In this study, Fe(II) SCO/polylactic acid hybrid polymeric composites have been prepared by film casting. The mononuclear coordination complex [Fe{N(CN)2}2(abpt)2] was incorporated into polylactic acid. The morphological, structural and thermoanalytical characterization

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13

Ortenzi, Marco Aldo, Stefano Gazzotti, Begonya Marcos, et al. "Synthesis of Polylactic Acid Initiated through Biobased Antioxidants: Towards Intrinsically Active Food Packaging." Polymers 12, no. 5 (2020): 1183. http://dx.doi.org/10.3390/polym12051183.

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Polylactide (PLA)-based polymers, functionalized with biobased antioxidants, were synthesized, to develop an intrinsically active, biobased and potentially biodegradable material for food packaging applications. To achieve this result, phenolic antioxidants were exploited as initiators in the ring opening polymerization of l-lactide. The molecular weight, thermal properties and in vitro radical scavenging activity of the polymers obtained were compared with the ones of a PLA Natureworks 4043D, commonly used for flexible food packaging applications. The most promising synthesized polymer, beari

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14

Frone, A. N., S. Berlioz, J. F. Chailan, D. M. Panaitescu, and D. Donescu. "Cellulose fiber-reinforced polylactic acid." Polymer Composites 32, no. 6 (2011): 976–85. http://dx.doi.org/10.1002/pc.21116.

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15

Al, Gulyaz, Deniz Aydemir, Bulent Kaygin, Nadir Ayrilmis, and Gokhan Gunduz. "Preparation and characterization of biopolymer nanocomposites from cellulose nanofibrils and nanoclays." Journal of Composite Materials 52, no. 5 (2017): 689–700. http://dx.doi.org/10.1177/0021998317713589.

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The aim of this study was to investigate the effects of cellulose nanofibrils and nanoclays on the mechanical, thermal, and morphological properties of polyhydroxybutyrate and polylactic acid bio-polymers. Polyhydroxybutyrate and polylactic acid as a polymer matrix and nanoclays and cellulose nanofibrils as reinforcing nano-fillers were used to prepare the biopolymer nanocomposites in twin screw extruder. Density, flexure strength and flexure modulus, tensile strength and tensile modulus, impact strength, thermal properties, and morphological characterization of the obtained biopolymer nanocom

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16

Nagarajan, Selvaraj, M. S. Kiran, John Tsibouklis, and Boreddy Siva Rami Reddy. "Multifunctional star-shaped polylactic acid implants for use in angioplasty." J. Mater. Chem. B 2, no. 38 (2014): 6549–59. http://dx.doi.org/10.1039/c4tb00272e.

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17

Barmouz, Mohsen, and Amir Hossein Behravesh. "Foaming and thermal characteristics of bio-based polylactic acid–thermoplastic polyurethane blends." Journal of Cellular Plastics 54, no. 6 (2018): 931–55. http://dx.doi.org/10.1177/0021955x18793841.

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This paper reports a research work on characterization of foamed biocompatible polylactic acid–thermoplastic polyurethane blends in terms of microstructural, thermal, and physical properties. The brittleness of the polylactic acid is compensated via blending with an elastoplastic phase of thermoplastic polyurethane. A range of low bulk density foam with a high cell density was produced in a solid state foaming process. Addition of thermoplastic polyurethane phase acted against the cell growth and thus foam expansion, apparently due to its inherent lower storage modulus, which weakens the polym

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18

Scripcaru, Andrei, Norin Forna, Alexandru Bogdan Ciubara, et al. "The Advantages of Bioresorbable INION� Implants in Traumatology Design, polymer composition and preliminary results." Materiale Plastice 56, no. 1 (2019): 47–50. http://dx.doi.org/10.37358/mp.19.1.5120.

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Some disadvantages of traditional metallic implants used in orthopedics and traumatology prompted the development of bioresorbable polymer devices.The aim of this experimental study is to emphasize the characteristics of INION� resorbable implants (regarding design and polymers compositions), as well as to evaluate the results when using these innovative implants in two trauma cases. The polymers used in manufacturing INION� devices (Trimethylene Carbonate/TMC; L-Polylactic acid/LPLA; D,L Polylactic acid/DLPLA; Polyglycolic acid/PGA) degrade in alpha-hydroxy acids, gradually losing their hardn

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19

Tajdari, Ali, Amir Babaei, Alireza Goudarzi, and Razie Partovi. "Preparation and study on the optical, mechanical, and antibacterial properties of polylactic acid/ZnO/TiO2 shared nanocomposites." Journal of Plastic Film & Sheeting 36, no. 3 (2020): 285–311. http://dx.doi.org/10.1177/8756087919900365.

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In this research, first, ZnO nanorods were synthesized by hydrothermal method and characterized in terms of morphological and structural properties by means of field emission scanning electron microscopy, Fourier transform infrared, and X-ray diffraction techniques. Subsequently, polylactic acid/ZnO, polylactic acid/TiO2, and polylactic acid/ZnO/TiO2 nanocomposites with different percentages of nanoparticles and two different types of ZnO morphologies were prepared and their microstructural, optical, mechanical, hydrolytic degradation, and antibacterial properties were investigated. Field emis

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20

Yammine, Paolo, Rima Kassab, and Dima Moussa. "Encapsulation of an antifungal agent within biodegradable polymers: composition effect." JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 3 (2016): 4274–79. http://dx.doi.org/10.24297/jac.v12i3.2168.

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Polylactic acid and poly(lactic-co-glycolic acid) are two aliphatic polyesters commonly used in drug delivery systems. Having a hydrophobic nature, they could be used for the encapsulation of hydrophobic drugs such as Amphotericin B. Drug-loaded microspheres were prepared using solvent evaporation by changing the ratio of Polylactic acid to poly(lactic-co-glycolic acid) in the organic mixture. Results showed that higher drug encapsulation and drug loading values were seen for formulations having higher lactide content. This had also influenced the drug release rate which was slower at higher l

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21

Huang, Yi, Yu Wang, and Jiarui Wen. "A Study on modification of polylactic acid and its biomedical application." E3S Web of Conferences 308 (2021): 02008. http://dx.doi.org/10.1051/e3sconf/202130802008.

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Polylactic acid (PLA) is one of the most extensively studied biodegradable materials. PLA is a versatile material with excellent bio-compatibility, bioabsorbability, biodegradability, and low toxicity. As an environmentally friendly polymer, PLA is favored by researchers and has explored many commercial applications, playing an important role in medicine and industry to replace many traditional petrochemical-based polymers. However, the strength and mechanical properties of PLA need to be improved to meet the practical application of multiple scenarios. The purpose of this review is to explore

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22

Punet, Xavier, Riccardo Levato, Isabelle Bataille, Didier Letourneur, Elisabeth Engel, and Miguel A. Mateos-Timoneda. "Polylactic acid organogel as versatile scaffolding technique." Polymer 113 (March 2017): 81–91. http://dx.doi.org/10.1016/j.polymer.2017.02.056.

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23

LUNT, JAMES, and REW L. SHAFER. "Polylactic Acid Polymers from Corn. Applications in the Textiles Industry." Journal of Industrial Textiles 29, no. 3 (2000): 191–205. http://dx.doi.org/10.1106/lvy7-vbvf-v8lr-l5at.

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24

FOLTYNOWICZ, ZENON, and PATRYCJA JAKUBIAK. "Polylactic acid - biodegradable polymer obtained from vegetable resources." Polimery 47, no. 11/12 (2002): 769–74. http://dx.doi.org/10.14314/polimery.2002.769.

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25

Thepthawat, Apicha, and Kawee Srikulkit. "Improving the properties of polylactic acid by blending with low molecular weight polylactic acid-g-natural rubber." Polymer Engineering & Science 54, no. 12 (2013): 2770–76. http://dx.doi.org/10.1002/pen.23835.

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26

Taha, Iman M., and Gerhard Ziegmann. "Potential of Sisal Reinforced Biodegradable Polylactic Acid and Polyvinyl Alcohol Composites." Key Engineering Materials 425 (January 2010): 167–78. http://dx.doi.org/10.4028/www.scientific.net/kem.425.167.

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The application of natural fibres as polymer reinforcement is of extreme interest, especially in combination with biodegradable polymers. Such “green” composite represent a step forward to eco-design and environmentally friendly applications. The use of biodegradable polylactic acid (PLA) on the basis of renewable resources in addition to the biodegradable polyvinyl alcohol (PVA) on petrochemical basis is compared in this study with the application of polypropylene (PP) as a surrounding matrix for sisal fibres. According to the law of similarities, the chemically similar structure of natural f

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27

Alimuzzaman, Shah, R. Hugh Gong, and Mahmudul Akonda. "Nonwoven polylactic acid and flax biocomposites." Polymer Composites 34, no. 10 (2013): 1611–19. http://dx.doi.org/10.1002/pc.22561.

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28

Horváth, Tibor, Tamás József Szabó, and Kálmán Marossy. "Polylactic Acid as a Potential Alternatives of Traditional Plastic Packagings in Food Industry." International Journal of Engineering and Management Sciences 5, no. 2 (2020): 123–29. http://dx.doi.org/10.21791/ijems.2020.2.16.

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Huge quantity of synthetic polymers is used as packaging materials in different fields of food industries. A significant part of these polymers applied as a primary, direct food contact construction. The scoped application area is the sweet industry. In this field Polystyrol (PS), Polypropylene (PP) and Polyethylene terephthalate (PET) have used but during the last fifteen years the usage of PET has been grown. In one hand the price of this material is efficient, form other hand the PET is the one of the most safe (for food industrial applications) petrol chemical plastic that can be used as p

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29

Eawwiboonthanakit, Netnapa, Mariatti Jaafar, Zuratul Ain Abdul Hamid, Mitsugu Todo, and Banhan Lila. "Tensile Properties of Poly(L-Lactic) Acid(PLLA) Blends." Advanced Materials Research 1024 (August 2014): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amr.1024.179.

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Poly (L-lactic) Acid (PLLA) is one type of degradable polymer which mostly used for bioplastic. PLLA has strength and modulus comparable with another commercial polymer and not degrade in general environment, however PLLA exhibits brittle fracture. In the present study, blending between PLLA with other polymers was carried out to improve the brittleness of PLLA resin. Polymers that been used in the blending process are synthetic rubber, waste rubber, acrylonitrile butadiene styrene (ABS) and polylactic acid microsphere. Blend ratio (98/2) was considered in the study . The tensile properties an

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30

Arif, Uzma, Sajjad Haider, Adnan Haider, et al. "Biocompatible Polymers and their Potential Biomedical Applications: A Review." Current Pharmaceutical Design 25, no. 34 (2019): 3608–19. http://dx.doi.org/10.2174/1381612825999191011105148.

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Background: Biocompatible polymers are gaining great interest in the field of biomedical applications. The term biocompatibility refers to the suitability of a polymer to body and body fluids exposure. Biocompatible polymers are both synthetic (man-made) and natural and aid in the close vicinity of a living system or work in intimacy with living cells. These are used to gauge, treat, boost, or substitute any tissue, organ or function of the body. A biocompatible polymer improves body functions without altering its normal functioning and triggering allergies or other side effects. It encompasse

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31

Decorosi, Francesca, Maria Luna Exana, Francesco Pini, et al. "The Degradative Capabilities of New Amycolatopsis Isolates on Polylactic Acid." Microorganisms 7, no. 12 (2019): 590. http://dx.doi.org/10.3390/microorganisms7120590.

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Polylactic acid (PLA), a bioplastic synthesized from lactic acid, has a broad range of applications owing to its excellent proprieties such as a high melting point, good mechanical strength, transparency, and ease of fabrication. However, the safe disposal of PLA is an emerging environmental problem: it resists microbial attack in environmental conditions, and the frequency of PLA-degrading microorganisms in soil is very low. To date, a limited number of PLA-degrading bacteria have been isolated, and most are actinomycetes. In this work, a method for the selection of rare actinomycetes with ex

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32

Ishihara, Shota, Yuta Hikima, and Masahiro Ohshima. "Preparation of open microcellular polylactic acid foams with a microfibrillar additive using coreback foam injection molding processes." Journal of Cellular Plastics 54, no. 4 (2018): 765–84. http://dx.doi.org/10.1177/0021955x18770441.

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Open microcellular polylactic acid foams with a fibrous polytetrafluoroethylene additive were prepared by a coreback foam injection molding technique. The effects of this fibrous additive on the foam cell structure were investigated. Fibrous polytetrafluoroethylene forms a network structure in polylactic acid in metering and mixing processes. The fibrous polytetrafluoroethylene network increased the viscoelasticity of polylactic acid and provided polylactic acid with a strain-hardening property. The network also provided heterogeneous bubble nucleation sites for physical foaming. However, beca

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33

Kittikorn, Thorsak, Wantani Chaiwong, Emma Stromberg, Rosana M. Torro, Monika Ek, and Sigbritt Karlsson. "Enhancement of interfacial adhesion and engineering properties of polyvinyl alcohol/polylactic acid laminate films filled with modified microfibrillated cellulose." Journal of Plastic Film & Sheeting 36, no. 4 (2020): 368–90. http://dx.doi.org/10.1177/8756087920915745.

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This work was done to improve the interfacial adhesion and engineering performance of polyvinyl alcohol/polylactic acid laminate film by altering the polyvinyl alcohol phase surface properties via incorporating microfibrillated cellulose modified by propionylation. Incorporating the modified microfibrillated cellulose into polyvinyl alcohol film improved adhesion between film layers during the laminating process. Improved peel strength and tensile properties confirmed that modified microfibrillated cellulose can produce better bonding between polyvinyl alcohol and polylactic acid via mechanica

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34

Cazacu, Georgeta, Raluca Nicoleta Darie-Nita, Oana Chirila, et al. "Environmentally Friendly Polylactic Acid/Modified Lignosulfonate Biocomposites." Journal of Polymers and the Environment 25, no. 3 (2016): 884–902. http://dx.doi.org/10.1007/s10924-016-0868-2.

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35

Teymoorzadeh, Hedieh, and Denis Rodrigue. "Morphological, mechanical, and thermal properties of injection molded polylactic acid foams/composites based on wood flour." Journal of Cellular Plastics 54, no. 2 (2016): 179–97. http://dx.doi.org/10.1177/0021955x16671304.

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In this work, injection molding was used to produce polylactic acid foams using azodicarbonamide as a chemical foaming agent and to study the effect of wood flour concentration (15, 25, and 40% wt.) on morphology (scanning electron microscopy), density (gas pycnometry), as well as mechanical (tensile, flexural, and impact) and thermal (differential scanning calorimetry) properties. In particular, density reduction was controlled by the amount of material injected (shot size). The results showed that polylactic acid properties increased with wood content, but decreased with density reduction. N

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36

Liu, X., L. Yu, K. Dean, et al. "Improving Melt Strength of Polylactic Acid." International Polymer Processing 28, no. 1 (2013): 64–71. http://dx.doi.org/10.3139/217.2667.

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37

Shamsuri, Ahmad Adlie, Siti Nurul Ain Md. Jamil, and Khalina Abdan. "A Brief Review on the Influence of Ionic Liquids on the Mechanical, Thermal, and Chemical Properties of Biodegradable Polymer Composites." Polymers 13, no. 16 (2021): 2597. http://dx.doi.org/10.3390/polym13162597.

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Biodegradable polymers are an exceptional class of polymers that can be decomposed by bacteria. They have received significant interest from researchers in several fields. Besides this, biodegradable polymers can also be incorporated with fillers to fabricate biodegradable polymer composites. Recently, a variety of ionic liquids have also been applied in the fabrication of the polymer composites. In this brief review, two types of fillers that are utilized for the fabrication of biodegradable polymer composites, specifically organic fillers and inorganic fillers, are described. Three types of

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38

Mohd Asri, Syazeven Effatin Azma, Zainoha Zakaria, Azman Hassan, and Mohamad Kassim Mohamad Haafiz. "Mechanical Properties of Polylactic Acid/Treated Fermented Chitin Nanowhiskers Biocomposites." Applied Mechanics and Materials 606 (August 2014): 89–92. http://dx.doi.org/10.4028/www.scientific.net/amm.606.89.

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The market share of biodegradable polymers from renewable sources has grown rapidly in the plastic industry. Properties of the polymers from renewable resources can be enhanced through blending and composite formation. Fermented chitin is a by-product in a bacterial prawn waste fermentation for protein recovery which has undergone mild chemical treatment producing treated fermented chitin (TFC). TFC was further acid hydrolysed to produce chitin nanowhiskers (TFCNW). The chitin nanowhiskers was used as filler in polylactic acid (PLA) through solution casting method. Atomic Force Microscopy show

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39

Hahn, Judith, Annette Breier, Harald Brünig, and Gert Heinrich. "Long-term hydrolytic degradation study on polymer-based embroidered scaffolds for ligament tissue engineering." Journal of Industrial Textiles 47, no. 6 (2017): 1305–20. http://dx.doi.org/10.1177/1528083716686940.

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Following anterior cruciate ligament injury, a mechanically stable tissue replacement is required for knee stability and to avoid subsequent damages. Tissue engineering of the anterior cruciate ligament demands a biocompatible scaffold with a controllable degradation profile to provide mechanical support for 3 to 6 months. It has been argued that embroidered textile scaffolds made of polylactic acid and poly(lactic-co-ɛ-caprolactone) fibres are a promising approach for the ligament tissue engineering with an adapted functionalization and cell seeding strategy. Therefore, the hydrolytic degrada

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40

Wang, Yesong, Dekun Kong, Qing Zhang, Wei Li, and Jiang Liu. "Process parameters and mechanical properties of continuous glass fiber reinforced composites-polylactic acid by fused deposition modeling." Journal of Reinforced Plastics and Composites 40, no. 17-18 (2021): 686–98. http://dx.doi.org/10.1177/0731684421998017.

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This article focuses on 3D printing of continuous glass fiber reinforced composites-polylactic acid by fused deposition modeling. An innovative continuous fiber reinforced composite 3D printer and self-made continuous glass fiber reinforced filament-polylactic acid are applied to study the influences of process parameters including printing temperature, speed, layer height, and fiber volume fraction on mechanical properties of continuous glass fiber reinforced composites-polylactic acid printing samples. Tensile and three-point bending tests are carried out to explore the mechanical responses

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41

Jašo, Vladislav, Gregory Glenn, Artur Klamczynski, and Zoran S. Petrović. "Biodegradability study of polylactic acid/ thermoplastic polyurethane blends." Polymer Testing 47 (October 2015): 1–3. http://dx.doi.org/10.1016/j.polymertesting.2015.07.011.

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42

Pérez Davila, Sara, Laura González Rodríguez, Stefano Chiussi, Julia Serra, and Pío González. "How to Sterilize Polylactic Acid Based Medical Devices?" Polymers 13, no. 13 (2021): 2115. http://dx.doi.org/10.3390/polym13132115.

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How sterilization techniques accurately affect the properties of biopolymers continues to be an issue of discussion in the field of biomedical engineering, particularly now with the development of 3D-printed devices. One of the most widely used biopolymers in the manufacture of biomedical devices is the polylactic acid (PLA). Despite the large number of studies found in the literature on PLA devices, relatively few papers focus on the effects of sterilization treatments on its properties. It is well documented in the literature that conventional sterilization techniques, such as heat, gamma ir

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Segliņa, Dalija, Anita Olšteine, Inta Krasnova, and Karina Juhņeviča. "Use of Packaging Materials for Extending the Shelf Life of Diploid Plum Variety ‘Kometa’." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences 67, no. 2 (2013): 174–78. http://dx.doi.org/10.2478/prolas-2013-0027.

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Polymers (films, bags and boxes) are the most widely used materials for packing of fresh fruit. Product shelf life is dependent on the packaging material barrier properties, including permeability of CO2 and O2. It focused on the uses of environmentally friendly biodegradable packaging materials for fresh fruit storage. Polypropylene, polylactic acid boxes and cardboard boxes placed in polylactic acid material bag were tested as packaging materials to extend the shelf life of diploid plum cultivar ‘Kometa’. Qualitative characteristics of plum (weight, firmness, soluble solids content and colou

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Lunt, James. "Large-scale production, properties and commercial applications of polylactic acid polymers." Polymer Degradation and Stability 59, no. 1-3 (1998): 145–52. http://dx.doi.org/10.1016/s0141-3910(97)00148-1.

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Rivière, Pauline, Tiina E. Nypelö, Michael Obersriebnig, et al. "Unmodified multi-wall carbon nanotubes in polylactic acid for electrically conductive injection-moulded composites." Journal of Thermoplastic Composite Materials 30, no. 12 (2016): 1615–38. http://dx.doi.org/10.1177/0892705716649651.

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Tailoring the properties of natural polymers such as electrical conductivity is vital to widen the range of future applications. In this article, the potential of electrically conducting multi-wall carbon nanotube (MWCNT)/polylactic acid (PLA) composites produced by industrially viable melt mixing is assessed simultaneously to MWCNT influence on the composite’s mechanical strength and polymer crystallinity. Atomic force microscopy observations showed that melt mixing achieved an effective distribution and individualization of unmodified nanotubes within the polymer matrix. However, as a trade-

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Dusselier, Michiel, Pieter Van Wouwe, Annelies Dewaele, Pierre A. Jacobs, and Bert F. Sels. "Shape-selective zeolite catalysis for bioplastics production." Science 349, no. 6243 (2015): 78–80. http://dx.doi.org/10.1126/science.aaa7169.

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Biodegradable and renewable polymers, such as polylactic acid, are benign alternatives for petrochemical-based plastics. Current production of polylactic acid via its key building block lactide, the cyclic dimer of lactic acid, is inefficient in terms of energy, time, and feedstock use. We present a direct zeolite-based catalytic process, which converts lactic acid into lactide. The shape-selective properties of zeolites are essential to attain record lactide yields, outperforming those of the current multistep process by avoiding both racemization and side-product formation. The highly produc

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Salazar Sánchez, Margarita Del Rosario, Jorge Arturo Cañas Montoya, Hector Samuel Villada Castillo, Jose Fernando Solanilla Duque, Raul Rodríguez Herrera, and Felipe Avalos Belmotes. "Biogenerated Polymers: An Enviromental Alternative." DYNA 87, no. 214 (2020): 75–84. http://dx.doi.org/10.15446/dyna.v87n214.82163.

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Biogenerated polymers are of great interest in industry in general, due to the trend of reduced use of petroleum-derived materials. However, their development costs are high and the benefit is still low. Currently, biodegradable alternatives are available from biogenerated polymers approximately 10% of the plastics market. Its consumption is estimated at 50,000 tons/year in Europe, with a share of less than 1%. In this order of ideas, the objective of this revision is to show the importance of the production of biogenerated polymers in the manufacture of biodegradable materials, from their for

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Kollar, Jakub, Andrea Morelli, Federica Chiellini, Stanislav Miertus, Dusan Bakos, and Vladimir Frecer. "Epithelial cell adhesion on films mimicking surface of polymeric scaffolds of artificial urethra compared to molecular modeling of integrin binding." Journal of Bioactive and Compatible Polymers 34, no. 3 (2019): 280–90. http://dx.doi.org/10.1177/0883911519843309.

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In this study, a combined experimental and computational study of long-term human bladder epithelial cell line HBLAK adhesion and proliferation on five different polymeric surfaces, namely hyaluronic acid, amylose, collagen, polyhydroxybutyrate, and polylactic acid, was performed with the goal to understand the nature of the attraction between various surface materials and a simplified model of the cell surface (transmembrane protein integrin). These biodegradable polymers are frequently used as scaffolds for tissue engineering. During formation of the new tissue, the scaffold polymers are gra

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Doustgani, Amir. "Doxorubicin release from optimized electrospun polylactic acid nanofibers." Journal of Industrial Textiles 47, no. 1 (2016): 71–88. http://dx.doi.org/10.1177/1528083716634033.

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Electrospinning has been known as an efficient method for fabrication of polymer nanofibers. In this study, an electrospun nanofibrous mats based on polylactic acid with a defined release using doxorubicin was developed. The effects of process parameters, such as concentration, distance, applied voltage, temperature and flow rate on the mean diameter of electrospun doxorubicin-loaded polylactic acid nanofibers were investigated. The fiber morphology and mean fiber diameter of prepared nanofibers were investigated by scanning electron microscopy. Differential scanning calorimetry was employed t

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Leluk, Karol, Stanisław Frąckowiak, Joanna Ludwiczak, Tomasz Rydzkowski, and Vijay Kumar Thakur. "The Impact of Filler Geometry on Polylactic Acid-Based Sustainable Polymer Composites." Molecules 26, no. 1 (2020): 149. http://dx.doi.org/10.3390/molecules26010149.

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Recently, biocomposites have emerged as materials of great interest to the scientists and industry around the globe. Among various polymers, polylactic acid (PLA) is a popular matrix material with high potential for advanced applications. Various particulate materials and nanoparticles have been used as the filler in PLA based matrix. One of the extensively studied filler is cellulose. However, cellulose fibres, due to their hydrophilic nature, are difficult to blend with a hydrophobic polymer matrix. This leads to agglomeration and creates voids, reducing the mechanical strength of the result

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