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.
The detailed knowledge of the structure and dynamics in molecular level is very relevant for our understanding of the conductivity mechanism of solid state polymer electrolytes. In this work, we have synthesized two conductive β-CD-polyether/Li+ inclusion crystals, which both have the channel-like structure formed by the β-CDs, but differ by the chemical nature of the assembled polymer chains. 1H,...
A series of high-resolution solid-state 13 C NMR experiments were performed on both unstretched and in situ stretched natural rubber samples. From the 13 C CP/MAS spectra, it was found that natural rubber does form small crystals at room temperature though the degree of crystallinity is very small. Furthermore, from the 13 C DD/MAS spectra, the crystalline signals...
The noncrystalline structures of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) copolymers were studied by variable temperature solid-state wide-line 1 H NMR and solid-state high-resolution 13 C NMR spectroscopy. It is found that at room temperature there exists a rich and rigid component in the noncrystalline region of PHB and PHBV. The...
A novel method for determining the minimum crystallizable sequence length, ζ * , of the semicrystalline copolymers was proposed recently. By applying it to several semicrystalline copolymer systems, the general applicability of the method was tested. The value of ζ * was found to be dependent on the crystallization conditions and the size of the comonomer unit. The rationality of the...
The phase structures of a series of ethylene-dimethylaminoethyl methacrylate (EDAM) copolymer samples were investigated by solid-state high-resolution 13 C n.m.r. spectroscopy. It is found that at least the α and β methylene units relative to the tertiary carbon of dimethylaminoethyl methacrylate (DAM) along the molecular chain as well as DAM comonomer units are located outside the crytalline...
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.