Results 151 to 160 of about 148,360 (199)

Poly(lactic acid) composites with poly(lactic acid)‐modified carbon nanotubes

Journal of Polymer Science Part A: Polymer Chemistry, 2013
ABSTRACTThis work reports the study of the effect of chemical functionalization of carbon nanotubes on their dispersion in poly(lactic acid). The nanotubes were functionalized by the 1,3‐dipolar cycloaddition reaction, generating pyrrolidine groups at the nanotube surface. Further reaction of the pyrrolidine groups with poly(lactic acid) was studied in
Novais, R. M., Simon, Frank, Potschke, Petra, Villmow, Tobias, Covas, J. A., Paiva, M. C.   +5 more
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Biodegradable poly(lactic acid) polymers

Journal of Biomedical Materials Research, 1971
AbstractThe synthesis of poly(lactic acids) from the cyclic lactides and properties of the polymers prepared have been described. Degradation rates in vitro under homogeous and heterogeneous conditions have been measured. The kinetics of deesterification under homogeneous conditions is second order and an activation energy of 11 Kcal/mol has been ...
R K, Kulkarni, E G, Moore, A F, Hegyeli, F, Leonard   +3 more
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Poly(lactic acid) based hydrogels

Advanced Drug Delivery Reviews, 2016
Polylactide (PLA) and its copolymers are hydrophobic polyesters used for biomedical applications. Hydrogel medicinal implants have been used as drug delivery vehicles and scaffolds for tissue engineering, tissue augmentation and more. Since lactides are non-functional, they are copolymerized with hydrophilic monomers or conjugated to a hydrophilic ...
Arijit, Basu, Konda Reddy, Kunduru, Sindhu, Doppalapudi, Abraham J, Domb, Wahid, Khan   +4 more
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Electrospinning of Poly(Lactic Acid)/Poly(Lactic Acid-Co-Lysine) Blend

Applied Mechanics and Materials, 2014
Electrospun poly (lactic acid)/poly (lactic acid-co-lysine) (PLA/PLL) blend were prepared, and the structures including fibers, beads and microspheres and properties of electrospun material were characterized. Viscosity, conductivity and surface tension of electrospinning solution had critical effect on the structures of the electrospun blend.
Jun Yan Yao, Yu Jie Li, Zhi Du, Ming He Chen   +3 more
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Spinnability and characterization of poly(D‐lactic acid)‐blended poly(L‐lactic acid) filament yarns

Journal of Applied Polymer Science, 2021
AbstractConventional textiles are produced mainly by petroleum‐based polymeric materials, which are not biodegradable, cause serious pollution, and waste problems. Especially, poly(ethylene terephthalate) is the most used thermoplastic polyester in various textile applications.
Onur Celen, Hasan Basri Kocer
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Poly(lactic acid)

2009
Abstract Major Applications L-PLA is used as sutures and dental, orthopaedic, and drug delivery devices. D,L-PLA is used mainly for drug delivery. Both are of interest in the area of tissue engineering. Properties of Special Interest Good biocompatibility; biodegradable mainly by simple hydrolysis; bioresorbable; very good processability;
Lichun Lu, Antonios G Mikos
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Bioresorbable films of polycaprolactone blended with poly(lactic acid) or poly(lactic-co-glycolic acid)

International Journal of Biological Macromolecules, 2023
Recent complications on the use of polypropylene meshes for hernia repair has led to the development of meshes or films, which were based on resorbable polymers such as polycaprolactone (PCL), polylactic acid (PLA) and poly(lactic-co-glycolic acid) (PLGA).
Jagan Mohan, Dodda, Mina Ghafouri, Azar, Petr, Bělský, Miroslav, Šlouf, Veronika, Gajdošová, Phanindra Babu, Kasi, Luis Oliveros, Anerillas, Tomáš, Kovářík   +7 more
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Sculptra (Injectable Poly-L-Lactic Acid)

Facial Plastic Surgery Clinics of North America, 2007
As contemporary antiviral therapy provides patients who have HIV effective long-term management of their disease, the prevalence of facial HIV-associated lipoatrophy is increasing. Sculptra (Dermik Laboratories, Berwyn, Pennsylvania) (injectable poly-L-lactic acid) is US Food and Drug Administration approved for the treatment of HIV-associated ...
Sanjay P, Keni, Douglas M, Sidle
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Different enantioselectivity of two types of poly(lactic acid) depolymerases toward poly(l-lactic acid) and poly(d-lactic acid)

Polymer Degradation and Stability, 2011
Abstract Poly(lactic acid) (PLA) depolymerases are categorized into protease-type and lipase-type. Protease-types can hydrolyze poly( l -lactic acid) (PLLA) but not poly( d -lactic acid) (PDLA). Lipase-types, including cutinase-like enzyme (CLE) from Cryptococcus sp. strain S-2 preferentially hydrolyze PDLA.
Fusako Kawai, Kosuke Nakadai, Emiko Nishioka, Hajime Nakajima, Hitomi Ohara, Kazuo Masaki, Haruyuki Iefuji   +6 more
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Enhanced Stereocomplex Formation of Poly(L‐lactic acid) and Poly(D‐lactic acid) in the Presence of Stereoblock Poly(lactic acid)

Macromolecular Bioscience, 2007
AbstractStereoblock poly(lactic acid) (sb‐PLA) is incorporated into a 1:1 polymer blend system of poly(L‐lactic acid) (PLLA) and poly(D‐lactic acid) (PDLA) that has a high molecular weight to study its addition effect on the stereocomplex (sc) formation of PLLA and PDLA. The ternary polymer blend films are first prepared by casting polymer solutions of
Kazuki, Fukushima, Yoon-Hee, Chang, Yoshiharu, Kimura   +2 more
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