84051-81-0Relevant articles and documents
Synthesis and characterization of a novel fluorine-containing copolymer P(FPO/NIMMO) as a potential energetic binder
Dong, Qingfeng,Gao, Ziru,Li, Houbin,Liu, Huihui,Shuai, Jingyu,Wang, Guannan,Xiong, Yabo,Zhang, Tao,Zhu, Qing
, (2021/08/12)
The energetic polymeric binders play a key role in the solid propellants, and it create an important need for the development of the energetic binder performance. In this work, we developed a strategy for obtaining a novel fluorine-containing copolymer P(FPO/NIMMO) by the cationic ring-opening polymerization of 2-(2,2,3,3-tetrafluoro-propoxymethyl)-oxirane (FPO) and 3-nitratomethyl-3-methyloxetane (NIMMO). The chemical structure of P(FPO/NIMMO) was systemically characterized by Fourier transform infrared (FT-IR), 1H and 13C nuclear magnetic resonance (1H NMR and 13C NMR), and gel permeation chromatography (GPC). Thermogravimetric analysis (TGA-DTG) was utilized to evaluate the thermal stability of (FPO/NIMMO) and the result showed that the sharp weight loss temperature was at 215.7 °C. In comparison with PNIMMO, the P(FPO/NIMMO) had a lower glass transition temperature (Tg) of -42.7 °C detecting by the differential scanning calorimetry (DSC), indicating that it developed the better stability performance. This new strategy is devised for the utility of P(FPO/NIMMO) copolymer, enabling their extension to be potential energetic binder for solid propellants.
Practical method for the preparation of nitrate esters
Hwu,Vyas,Patel,Lin,Yang
, p. 471 - 473 (2007/10/02)
A new and cost-effective method was developed for the preparation of nitrate esters in 67-92% yields from the corresponding alkyl toluenesulfonates and sodium nitrate with a catalytic amount of tetrabutylammonium nitrate in benzene and water at 110-135°C in a sealed tube.
Kinetics and Mechanism for the Alkaline Homogeneous Hydrolysis of 1,1,1-Trimethylolethane Trinitrate
Hoffsommer, John C.,Glover, Donald J.,Burlinson, Nicholas E.
, p. 315 - 321 (2007/10/02)
The kinetics for the alkaline homogeneous hydrolysis of 1,1,1-trimethylolethane trinitrate (MTN) in 95percent ethanol-water with sodium hydroxide concentrations between 0.25 and 2.1 M and temperatures between 50.0 and 60.0 degC have been investigated.One mole of MTN was found to react with 3 mol of base and to hydrolize by a series of consecutive and competitive bimolecular and internal cyclization reactions involving three nitrate ester intermediates to form the cyclic alcohol ether 3-methyl-3-oxetanemethanol (AE) as the final major product with only trace amounts of the expected trialcohol 1,1,1-tris(hydroxymethyl)ethane (TA).MTN and its intermediates showed good second-order rate constants for the expression -d(MTN)/dt = k1(MTN) = k2(B-)(MTN), where k1 is the first-order rate constant with excess base, B-.Relative k2 values in 95percent ethanol-water, 95percent methanol-water, and water were found to be 1.0, 0.1, and 0.01, respectively.Hydrolysis kinetics and product formation for each nitrate ester intermediate have been determined, and an overall hydrolysis mechanism for MTN is presented.
