Synthesis and characterization of poly(vinyl 2,4,6‐trinitrophenylacetal) as a new energetic binder

Abstract

Poly(vinyl alcohol) was modified by an aldehyde acetal reaction with 2,4,6-trinitrophenylacetaldehyde to give a new energetic polymer poly(vinyl 2,4,6-trinitrophenylacetal) (PVTNP). The structure of PVTNP was characterized by elemental analysis, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectra. The glass-transition temperature of PVTNP was evaluated by differential scanning calorimetry (DSC), and the thermal stability of PVTNP was tested by differential thermal analysis (DTA) and thermogravimetric analysis (TGA). DSC traces showed that the PVTNP polymer had one single glass-transition temperature at 105.3 C. DTA and TGA curves showed that the thermooxidative degradation of PVTNP in air was a three-step reaction, and the percentage of degraded PVTNP reached nearly 100% at 650 C.

Synthesis and Characterization of [60]Fullerene-Glycidyl Azide Polymer and Its Thermal Decomposition

“…Moreover, the terminal hydroxyl group of glycidyl azide polymer (GAP) can be easily modified through various reactions such as esterification, acetalization, etherification, etc. [18][19][20][21][22][23][24]. In this paper, GAP was further functionalized via esterification with malonyl dichloride and subsequent brominate reaction to afford bromomalonic acid GAP ester (BM-GAP), which can easily react with C60 through a modified Bingel reaction [25] to afford a new fullerene derivative, namely, [60]fullerene GAP (C60-GAP), which perhaps could become a new material of energetic burning rate additive.…”

Co-sintering anode and Y2O3 stabilized ZrO2 thin electrolyte film for solid oxide fuel cell fabricated by co-tape casting

“…Three peaks were observed for PVB in Fig. 2 (b), two small peaks at 365 C, 419 C and a main peak at 510 C. The peaks of 365 C and 419 C corresponded to the decomposition of the vinyl [26]. The main weigh loss occurred in the temperature range of 350e450 C. The large exothermic peak was not associated with the primary first weigh loss, but with the second stage, which occurred in the temperature of 450e600 C. These exothermic peaks could be attributed to a large oxidization reaction combined with a weight loss of volatile products [27].…”

Constrained sintering of Y2O3-stabilized ZrO2 electrolyte on anode substrate

“…At approximately 200 C, the mass loss was significant. Three peaks were observed for the green tape, 100 C, 320 C and a main peak at 490 C. The exothermic peak at 100 C was because of the combustion of the vinyl [19]. The peak of 320 C corresponded to the combustion of the starch [20].…”