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.
UV-curable waterborne polyurethanes (CO2-UV-WPUs) with CO2-polyols as soft segment were firstly synthesized. In addition to the good mechanical performance, the coexistence of carbonate and ether moieties in soft segment assured the excellent hydrolysis resistance of CO2-UV-WPU compared with polybutylene adipate glycol based waterborne polyurethane (PBA-UV-WPU). Its retention of tensile strength reached...
A series of polyrotaxane (PR)-based triblock copolymers comprising a PR middle block and poly(n-butyl methacrylate) (PBMA) flanked blocks were prepared via bulk ATRP of n-butyl methacrylate initiated with polypseudorotaxanes self-assembled from α-cyclodextrins (α-CDs) with 2-bromoisobutyryl terminated Pluronic 17R4 at 35 °C. Their structure was verified by 1 H NMR, FTIR, GPC, WXRD and TGA...
Biodegradable polyrotaxane (PR)-based triblock copolymers were synthesized via the atom transfer radical polymerization (ATRP) of N-isopropylacrylamide (NIPAAm) initiated with polypseudorotaxanes (PPRs) consisting of a distal 2-bromopropiomyl bromide end-capping poly(ε-caprolactone) (Br-PCL-Br) and a varying amount of α-cyclodextrins (α-CDs) in the presence of Cu(I)Br/PMDETA at 25 °C in aqueous solution...
With the aim of multifunctionalized all-optical photorefractive polymers bearing a non-conjugated main chain (NCMC), four novel norbornene-containing monomers were synthesized by introduction of different alkyl spacers between the functional chromophore and norbornene group. The polymers were prepared via ring-opening metathesis polymerization (ROMP) and characterized by IR, UV–Vis, GPC, DSC, TG,...
It was reported that polyrotaxanes (PRs) comprising β-cyclodextrins (β-CDs) and Pluronic F127 end-capped with poly(N-isopropylacrylamide) blocks show a β-CD aggregated state in which the threaded β-CDs are self-aggregated into a typical channel-type crystal structure after water incubation. At the same time, they converse into a β-CD dispersed state in which the entrapped β-CDs are randomly dispersed...
Herein novel polyrotaxanes (PRs) comprising γ-CDs and Pluronic F127 end-capped using poly(N-isopropylacrylamide) blocks were prepared via the atom transfer radical polymerization in aqueous medium at room temperature. The structure was characterized in detail by 1 H NMR, 2D NOESY NMR, FTIR, GPC, WXRD and DSC analyses. Solvent treatments were conducted on the resulting PRs via incubation in...
Block copolymer self-assembly is a burgeoning subject in polymer and materials science driven by both fundamental and applied inspirations. Whereas the vast majority of block copolymer studies have focused on highly symmetric morphologies, here we report the first observation of an unusual asymmetric cylindrical phase in thick films of an organic/organometallic block copolymer, poly(styrene-block-ferrocenyldimethylsilane)...
The preparation and photocatalytic properties of titanium dioxide (TiO 2 )–fluoropolymer fiber nanocomposites were studied. The fluoropolymer nanofibers with carboxyl group were prepared by electrospinning. The complex was formed between carboxyl on fluoropolymer electrospun fiber surface and titanium ion, and then the TiO 2 nanoparticles were immobilized on the surface of fluoropolymer...
The diffuse scattering from the surfaces of melt and glassy polymer brushes has been studied systematically for the first time using polystyrene (PS) and poly(n-butylacrylate) (PnBA) brushes synthesized by free radical polymerization. The data show unambiguously that the diffuse scattering behavior varies systematically with brush thickness for both types of brushes. We attribute a cross-over in scattering...
The dynamic and steady state behavior of metallocene linear low density polyethylene (m-LLDPE) blended with metallocene high density polyethylene (m-HDPE) and with low density polyethylene (LDPE) were measured in parallel plate rheometer at 160, 180, and 200°C. The composition dependence of zero shear viscosity η0, the characteristic relaxation time τ0 and the characteristic frequency ω0 of m-LLDPE/m-HDPE...
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.