نتایج جستجو برای: phosphazene
تعداد نتایج: 170 فیلتر نتایج به سال:
Organocatalysis for polymer chemistry has become a subject of significant interest in the last two decades. In this contribution, we have studied evolution microstructure poly(L-lactide) solution toluene at 105 °C presence various organocatalysts. Weak bases such as triethylamine and DMAP (4-dimethylaminopyridine) lead to low extent epimerization chain scission reaction. The DBU (1,8-diazabicyc...
A novel type of phosphazene containing an additive that acts both as a catalyst and flame retardant for benzoxazine binders is presented in this study. The synthesis derivative hexachlorocyclotriphosphazene (HCP) meta-toluidine was carried out the medium latter, which made it possible to achieve complete substitution chlorine atoms initial HCP. Thermal flammability characteristics modified comp...
Using the long-range correction (LC) density functional theory (DFT) scheme introduced by Iikura et al. [J. Chem. Phys. 115, 3540 (2001)] and the Coulomb-attenuating model (CAM-B3LYP) of Yanai et al. [Chem. Phys. Lett. 393, 51 (2004)], we have calculated a series of properties that are known to be poorly reproduced by standard functionals: Bond length alternation of pi-conjugated polymers, pola...
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