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.
Light emitting oligomers of high photoluminescence (PL) quantum efficiency were prepared and emphasized in this study. Thereby, four light emitting oligomers containing 2,3,4,5-tetraphenylthiophene (TP) moiety were prepared by Heck coupling between 2,5-bis(4-bromophenyl)-3,4-diphenylthiophene and four diene monomers. Certain diene monomers containing silyl unit were especially used in an attempt to...
Two thermotropic copolyesters with inherent rigid spirobicromane (SPI) moieties were prepared to evaluate their registry effects of neighboring chains in the mesomorphic state. Due to this chain registry effect, copolyester I-19, synthesized from polycondensation of terephthaloyl bis(4-oxybenzoyl chloride) (TOBC), heptanediol (HD, 90mol%), and SPI (10mol%) exhibited different thermal behavior between...
A thermotropic copolyester I-19 prepared from a rigid, bent spirobicromane (SPI), 1,7-heptanediol (HD), and an aromatic ester triad, TOBC (terephthaloyl bis(4-oxybenzoyl chloride), was prepared and its thermal behavior investigated by differential scanning calorimetry. Copolyester I-19 exhibited completely different DSC thermograms between samples cooled from the isotropic liquid and the mesomorphic...
The modification of novel trifunctional epoxy resins with silicon rubber to reduce stress while maintaining a high glass transition temperature is described. Trifunctional epoxy resins were synthesized from the condensation of 4-hydroxybenzaldehyde, chloroacetaldehyde or crotonaldehyde with phenol, followed by epoxidation with a halohydrin. The structure of the synthesized triphenols was characterized...
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.