Synthesis and Investigation of the New Derivatives of Poly(Epichlorohydrin) Containing Energetic Groups

Abstract

In this research, poly(epichlorohydrin)(PECH) is modified by phenylhydrazine as well as 4-nitrophenylhydrazine and 2,4-dinitro phenylhydrazine. The chemical structures of the new derivatives of PECH are analyzed by Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR) and ultraviolet-visible (UV) techniques as well as carbon-hydrogen-nitrogen (CHN) ultimate analysis. Thermal characteristics of reaction products are studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Moreover, glass transition temperature (T g ) of these new polymers are determined. The results indicate that modifications of the poly(epichlorohydrin) are carried out successfully. The new energetic derivatives of PECH are good candidates for chemical industries, which may be considered as a novel class of energetic binders.Keywords: PECH · phenyl hydrazine · 4-nitrophenylhydrazine · 2,4-dinitrophenylhydrazine · energetic poly(epichlorohydrin) 2 Experimental MaterialsAll the chemicals used in this work were of analytical grade. Epichlorohydrin and N,N-dimethylacetamide (DMAc) were purchased from sigma-Aldrich. Tin tetrachloride (SnCl 4 ), phenylhydrazine, 4-nitrophenylhydrazine, 2,4-dinitrophenylhydrazine, ethylene glycol and dichloromethane were obtained from [a] F.

MXene reinforced microporous bacterial cellulose/sodium alginate dual crosslinked cryogel for bone tissue engineering

“…This change suggests the formation of hydrogen bonding between surface functional groups on MXene nanosheets and -OH groups on BC fragment nanofibers. Additionally, a peak at 1129 cm −1 associated with -C-O-stretching vibrations characteristic of tertiary alcohols provides evidence of exchange of epoxy groups on ECH, confirming the presence of chemical cross-linking in the cryogel structure [44]. It is important to note that the combination of physical and chemical cross-linking mechanisms plays an important role in enhancing the mechanical properties of these cryogels.…”

The crystal structure of 3-chloro-1-hydrazino-2,4,6-trinitrobenzene, C6H4ClN5O6

“…Nitrophenyl hydrazine derivatives have broad applications in the fields of medicinal and materials chemistry; they can be used as test reagents for carbonyl groups and as intermediates for the synthesis of pharmaceuticals [5][6][7][8][9].…”

Evaluation of the Effect of the Central Block Type on Viscosity-Temperature Characteristics of Epichlorohydrin Polymers

“…The polymerization warrants the formation of polymers having a blocktype structural constitution, in which the corresponding type of the hydroxyl-bearing compound serves as central units, epichlorohydrin monomeric units as the side groups and hydroxyls as the terminal groups. The structures of the epichlorohydrin polymers were confirmed by 1 H, 13 C, NMR and IR spectroscopies and gel-permeation chromatography. The level of the molecularweight characteristics of the test compounds was found to be little dependent on the type of the hydroxyl-bearing compound, whereas the viscosity and activation energy of the viscous flow are largely governed by the central block of the polymer.…”

“…Полимеризация обеспечивает образование полимеров блочного структурного построения, центральными звеньями которых выступает соответствующий тип гидроксилсодержащего соединения, боковые -мономерные звенья глицидилхлорида, терминальные группы -гидроксильные. Структура эпихлоргидриновых полимеров подтверждена методами 1 Н, 13 С ЯМР-и ИК-спектроскопии, гель-проникающей хроматографией. Установлено, что уровень молекулярно-массовых характеристик исследованных образцов слабо зависит от типа гидроксилсодержащего соединения, в то время как вязкость и энергия активации вязкого течения в значительной степени определяются центральным блоком полимера.…”