نتایج جستجو برای: poly n
تعداد نتایج: 1044704 فیلتر نتایج به سال:
Abstract Sets of the nonionic polymers poly( N -vinyl isobutyramide) (pNVIBAm) and -isopropyl methacrylamide) (pNIPMAm) are synthesized by radical polymerization covering molar mass range from about 20,000 to 150,000 kg mol −1 , their thermoresponsive solvent-responsive behaviors in aqueous solution studied. Both feature a lower critical temperature (LCST) apparently rare so-called type II, as ...
Poly(dG-dC) . poly(dG-dC) was modified by reaction with N-acetoxy-N-acetyl-2-aminofluorene (N-AcO-AAF). Two samples with 6.6% and 8.5% modified bases were prepared. The modified bases are randomly distributed along the polymer chain, as deduced from competition experiments between antibodies against N-2-(guanosin-8-yl)-acetylaminofluorene, modified poly(dG-dC) . poly(dG-dC), and modified DNAs. ...
Poly(p-N-chlorostyrenesulphonamide) synthesized via direct chlorination of poly[(p-styrene) sulphonamide], can be used for selective chlorination of aromatic compounds. Aromatic rings of the anisole, p-xylene, ethylbenzene and toluene are chlorinated with good yields. The polymer can be recovery, rechlorinated and reused several times.
Methoxymethylation of a variety of alcohols was performed using formaldehyde dimethyl acetal in the presence of 1,3-dichloro-5,5-dimethyl hydantoin [DCDMH] and Poly N,N′-dibromo-N-ethyl naphthyl-2,7-disulfonamide [PBNS] as catalysts at room temperature and under solvent-free conditions. Our experiments show that primary and secondary alcohols can be smoothly converted into the corresponding MOM...
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