Results 1 to 10 of about 3,727 (188)

FT-IR measurement as a simple tool for following formation of acidic functional groups in maleic anhydride containing polymers [PDF]

MethodsX, 2023
Titration is a measurement for maleic-anhydride containing polymers with significant chemicals consumption, time and human resource requirement meanwhile all the carbonyl groups have to be supposed to be in the cyclic form but it is not always the ...
Csilla Varga
doaj   +2 more sources

Triphenylphosphine‐Catalyzed Synthesis of β‐Thiopropionate Thioesters or Esters via the Reaction of Maleic Anhydride with Thiols and Alcohols [PDF]

ChemistryOpen
In this study, the one‐pot reaction of maleic anhydride with a combination of aromatic and aliphatic thiols, or with an alcohol and thiol mixture, in the presence of triphenylphosphine catalyst has been investigated.
Hamed Ahmadi, Sepideh Abbasifard, Najmeh Nowrouzi, Mohammad Abbasi   +3 more
doaj   +2 more sources

Simultaneous Determination by Selective Esterification of Trimellitic, Phthalic, and Maleic Anhydrides in the Presence of Respective Acids [PDF]

ACS Omega, 2023
Jacopo Ceccarelli, Stefano Dugheri, Giovanni Cappelli, Niccolò Fanfani, Donato Squillaci, Elisabetta Bucaletti, Nicola Mucci, Giulio Arcangeli   +7 more
doaj   +2 more sources

Closed-loop chemical recycling of cross-linked polymeric materials based on reversible amidation chemistry

Nature Communications, 2022
Closed-loop chemical recycling provides a solution to the end-of-use problem of synthetic polymers but the design of dynamic bonds for preparing chemically recyclable cross-linked polymers remains challenging.
Bo Qin, Siyuan Liu, Zehuan Huang, Lingda Zeng, Jiang-Fei Xu, Xi Zhang   +5 more
doaj   +1 more source

OH chemistry of non-methane organic gases (NMOGs) emitted from laboratory and ambient biomass burning smoke: evaluating the influence of furans and oxygenated aromatics on ozone and secondary NMOG formation [PDF]

Atmospheric Chemistry and Physics, 2019
Chamber oxidation experiments conducted at the Fire Sciences Laboratory in 2016 are evaluated to identify important chemical processes contributing to the hydroxy radical (OH) chemistry of biomass burning non-methane organic gases (NMOGs).
M. M. Coggon, M. M. Coggon, C. Y. Lim, A. R. Koss, A. R. Koss, A. R. Koss, K. Sekimoto, K. Sekimoto, K. Sekimoto, B. Yuan, B. Yuan, B. Yuan, J. B. Gilman, D. H. Hagan, V. Selimovic, K. J. Zarzana, K. J. Zarzana, K. J. Zarzana, S. S. Brown, J. M. Roberts, M. Müller, R. Yokelson, A. Wisthaler, A. Wisthaler, J. E. Krechmer, J. L. Jimenez, J. L. Jimenez, C. Cappa, J. H. Kroll, J. de Gouw, J. de Gouw, C. Warneke, C. Warneke   +32 more
doaj   +1 more source

Diels‐Alder Reactivity of a Chiral Anthracene Template with Symmetrical and Unsymmetrical Dienophiles: A DFT Study

ChemistryOpen, 2020
In this work, we used Density Functional Theory calculations to assess the factors that control the reactivity of a chiral anthracene template with three sets of dienophiles including maleic anhydrides, maleimides and acetoxy lactones in the context of ...
Jennifer P. Hernández‐Mancera, Prof. Francisco Núñez‐Zarur, Prof. Ricardo Vivas‐Reyes   +2 more
doaj   +1 more source

Acylation Reaction of Polystyrene with Organic Anhydrides and Investigation of the Physico-Mechanical Properties

Eurasian Chemico-Technological Journal, 2000
The acylation reaction of polystyrene with organic anhydrides, such as maleic and ace-tic anhydrides were investigated in the presence of cationic catalysis (AlCl3, BF3В·O(C2H5)2, FeCl3, SnCl4, TiCl4, ZnCl2), to synthesise some polyfunctional (carbonyl-,
R. Kurbanova, R. Mirzaoglu, M. Ersoz, E. Ozcan, E. Guler, V. Pamuk   +5 more
doaj   +1 more source

Maleic anhydride

, 2023
The German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re-evaluated maleic anhydride [108-31-6], considering all toxicological end points. Available publications and unpublished study reports are described in detail. Maleic anhydride is an irritant to the upper respiratory tract.
Hartwig, A, MAK Commission, Arand, Michael   +2 more
openaire   +1 more source

Crystalline Structure of Cellulose in Wood after Chemical Modification Using Cyclic Acid Anhydrides (Maleic and Succinic)

BioResources, 2023
The chemical modification of wood can be directed to improve various properties, e.g., the dimensional stability, hardness properties, and/or durability properties, against weathering. In this study, a Romanian softwood species Abies alba L.
Carmen-Alice Teacă
doaj   +2 more sources

Citraconylation and maleylation on the catalytic and thermodynamic properties of raw starch saccharifying amylase from Aspergillus carbonarius

Heliyon, 2020
Amylase capable of raw starch digestion presents a cheap and easier means of reducing sugar generation from various starch sources. Unfortunately, its potential for use in numerous industrial processes is hindered by poor stability.
Tochukwu Nwamaka Nwagu, Hideki Aoyagi, Bartholomew Okolo, Anene Moneke, Shigeki Yoshida   +4 more
doaj   +1 more source