Results 41 to 50 of about 52,519 (200)

Dicarboxylic esters: Useful tools for the biocatalyzed synthesis of hybrid compounds and polymers

Beilstein Journal of Organic Chemistry, 2015
Dicarboxylic acids and their derivatives (esters and anhydrides) have been used as acylating agents in lipase-catalyzed reactions in organic solvents. The synthetic outcomes have been dimeric or hybrid derivatives of bioactive natural compounds as well ...
Ivan Bassanini, Karl Hult, Sergio Riva
doaj   +1 more source

Methylenealkane-Based Low-Viscosity Ester Oils: Synthesis and Outlook

Lubricants, 2020
Both Group 4 poly-α-olefin (PAO) and Group 5 ester oil basestocks are used in formulations of synthetic engine oils, transmission fluids, and lubricants with leading characteristics such as low viscosity (providing fuel saving), high stability, and ...
Ilya Nifant’ev, Vladimir Bagrov, Alexander Vinogradov, Alexey Vinogradov, Sergey Ilyin, Nadezhda Sevostyanova, Sergey Batashev, Pavel Ivchenko   +7 more
doaj   +1 more source

Preparation and Characterization of Polymer- Ceramic Composite Bio-material [PDF]

Engineering and Technology Journal, 2010
This work focuses on studying the addition effect of the prepared HA powder asa filler material before and after the calcination process with different volumefractions (2.5, 5, 7.5, 10, 12.5, 15) vol% to the unsaturated polyester resin matrix.Many ...
Rabab Asim Abdul-Aziz, Waleed Asim Hanna, Kahtan Khalaf Al-khazraji   +2 more
doaj   +1 more source

Cyclic Polyesters with Closed‐Loop Recyclability from A New Chemically Reversible Alternating Copolymerization

Advanced Science
Polyesters with both cyclic topology and chemical recyclability are attractive. Here, the alternating copolymerization of cyclic anhydride and o‐phthalaldehyde to synthesize a series of cyclic and recyclable polyesters are reported for the first time ...
Xiaoxian Lu, Xun Zhang, Chengjian Zhang, Xinghong Zhang   +3 more
doaj   +1 more source

Oxidative degradation of polylactide (PLA) and its effects on physical and mechanical properties [PDF]

, 2014
The thermo-oxidative degradation of polylactide (PLA) films was studied between 70 and 150 C. It was shown that the oxidative degradation of PLA leads to a random chain cission responsible for a reduction of the molar mass.
FAYOLLE, Bruno, GUINAULT, Alain, MIQUELARD-GARNIER, Guillaume, RASSELET, Damien, RUELLAN, Alexandre, SOLLOGOUB, Cyrille   +5 more
core   +6 more sources

Copolymerization of epoxides with cyclic anhydrides catalyzed by dinuclear cobalt complexes

Beilstein Journal of Organic Chemistry, 2018
The alternating copolymerization of epoxides with cyclic anhydrides (CAs) is a highly diverse synthetic method for polyesters as the polymers’ architectures and properties can be easily controlled depending on the combination of two monomers.
Yo Hiranoi, Koji Nakano
doaj   +1 more source

Durability of biodegradable polymers for the conservation of cultural heritage [PDF]

, 2019
The use of polymers for conservation of cultural heritage is related to the possibility to slow down or stop natural deterioration which, in many cases, corresponds to stopping the entrance of liquid water and to favor spontaneous water vapor removal ...
Botta L., La Mantia F.P., Megna B., Mistretta M.C., Morreale M., Titone V.   +5 more
core   +2 more sources

Green Synthesis of Polyesters Using Surfactant Catalysts in Microemulsions: The Role of Micelle Shape and Aggregation on Polymer Formation

Orbital: The Electronic Journal of Chemistry
In this study, we explored traditional methods commonly found in the literature to analyze how surfactants and polymers interact during the synthesis of polyesters in emulsion systems. The study justifies its focus on micellar catalysis by exploring its
Vadilson Malaquias dos Santos, Fabricio Uliana, Rayanne Penha Wandenkolken Lima, Eloi Alves da Silva Filho   +3 more
doaj   +1 more source

Phosphorus-Containing Flame Retardants from Biobased Chemicals and Their Application in Polyesters and Epoxy Resins

Molecules, 2019
Phosphorus-containing flame retardants synthesized from renewable resources have had a lot of impact in recent years. This article outlines the synthesis, characterization and evaluation of these compounds in polyesters and epoxy resins.
Jacob Sag, Daniela Goedderz, Philipp Kukla, Lara Greiner, Frank Schönberger, Manfred Döring   +5 more
doaj   +1 more source

Covalent Functionalization of Bioengineered Polyhydroxyalkanoate Spheres Directed by Specific Protein-Protein Interactions

Frontiers in Bioengineering and Biotechnology, 2020
Bioengineered polyhydroxyalkanoate (PHA) spheres assembled in engineered bacteria are showing promising potential in protein immobilization for high-value applications.
Jin Xiang Wong, Jin Xiang Wong, Majela Gonzalez-Miro, Andrew J. Sutherland-Smith, Bernd H. A. Rehm   +4 more
doaj   +1 more source