The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Cellulose supported copper(0) was used as a highly active heterogeneous catalyst to synthesize N-glycosyl-1,2,3-triazoles from glycosyl azides and alkynes. Cellulose-Cu(0) catalysed the cycloaddition reaction to produce the corresponding products in good to excellent yields in water. This heterogeneous catalyst has the advantages of high catalytic reactivity and low copper leaching. The separation...
An approach to enhancing the volumetric expansion on polymerization of spirobislactone is proposed. This approach suggests a molecular modification of spirobislactone through attaching a rigid pendant segment bearing maleimido group to its aromatic ring. An additional volumetric expansion is achieved from loose molecular packing in cured resins due to the steric hindrance effect among rigid pendent...
A novel modifier for bismaleimide (BMI), 2,4-di (2-allylphenoxy)-6-(2-naphthyloxy)-1,3,5-triazine (DAPNPT) with higher yield was prepared in one-pot by reacting cyanuric chloride with 2-allylphenol at first, and then by directly treating the adduct with 2-naphthol without separation. The chemical structure of the monomer was characterized by FTIR, mass spectrum, 1H NMR and 13C NMR. By means of differential...
A series of new polybismaleimide oligomers with different molecular weight have been synthesized via Diels-Alder(DA) reaction of 4,4′-(bismaleimidodiphenyl) methane and bis(2-furylmethoxy)diphenyl silane first, then aromatization of the corresponding DA products. The prepared oligomers were characterized by FTIR, 1 HNMR, and the aromatization conditions were determined by FTIR and DSC. The...
Polypyrrole (PPy) was electrochemically synthesized in boron trifluoride ethyl ether (BTEE) whose acidity was adjusted with additional ethyl ether (EE). A high quality PPy film can be synthesized in a wide mole ratio range of BTEE/EE and under mild conditions. The obtained film showed the highest tensile strength (90MPa) we had ever seen and good anisotropy in electrical conductivity. The structure...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.