Synthesis and copolymerization of azidomethyl-substituted oxetanes: the morphology of statistical block copolymers

Mukhametshin, Timur I.; Петров, А. И.; Kuznetsova, N. V.; Петров, В. А.; Аверьянова, Н В; Garaev, I. Kh.; Kostochko, A. V.; Gubaidullin, А. Т.; Vinogradov, D. B.; Bulatov, P. V.

doi:10.1007/s10593-017-2128-3

Cited by 13 publications

(21 citation statements)

References 30 publications

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“…The temperatures of the onset of decomposition (Table 5) increased with the content of AMMO units in the Energy-Intensive Random Block Copolymers of 3,3-Bis (Nitratomethyl) Oxetane and 3-Azidomethyl-3- Methyloxetane 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 chain of copolymers, agreeing with the results for the BAMO-AMMO copolymers synthesized previously [29]. It is worth noting, that despite the absence of endotherms of melting in the crystalline melting phase in the copolymers identified by the DSC method, all samples softened at a temperature of 40-70 8C.…”

Section: Resultssupporting

confidence: 90%

“…The properties of the copolymers are similar to the ones of copolymers BAMO-AMMO [29] synthesized previously, which are thermoplastic elastomers, and can be processed into compositions in the form of a melt.…”

Section: Resultssupporting

confidence: 54%

“…It was shown that the products of reaction of aluminum alkyls with water, i. e. aluminoxanes of different length, trigger polymerization of four-membered cyclic ethers with azidomethyl groups [29,31] in the presence of trialkylaluminum and water. This was because maximum activity of catalyst systems trialkylaluminum-water ratio was achieved when an equimolar concentration of TIBA/water in the reaction mixture was used, with TIBA À0.2 mol/l, water À0.18 mol/l, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis was performed according to a modified version of the method published [29]. The BNMO (b) monomer (100-69.41 %, mol) is transferred to a reactor and thermostated in the presence of CH 2 Cl 2 (15-35 ml) at 35 8C.…”

Section: Preparation Of 33-bis(nitratomethyl)oxetane and 3-azidomethmentioning

confidence: 99%

“…It has been shown earlier that synthesis of high molecular weight copolymers (M w = 75000-120000) with random distribution of azidomethyl-substituted oxetane units can be carried out using organoaluminium catalysts, e. g. triiso-butylaluminum [29][30][31]. Such copolymers have better energetic and exploitative characteristics when compared with those obtained by way of elongation of prepolymers of azidomethyl-substituted oxetanes, though with the reduction in solubility after the former [32].…”

Section: Introductionmentioning

confidence: 99%

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Energy‐Intensive Random Block Copolymers of 3,3‐Bis (Nitratomethyl) Oxetane and 3‐Azidomethyl‐3‐ Methyloxetane

Mukhametshin

Sharipov

Петров

et al. 2018

Propellants Explo Pyrotec

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Copolymerization of 3,3-bis (nitratomethyl) oxetane and 3-azidomethyl-3-methyloxetane was carried out in the presence of the triisobutyl-aluminum-water catalyst system. The structure of synthesized high-molecular copoly-mers was proven with 13 C and 1 H NMR, IR-Fourier spectroscopy, GPC, and elemental analysis. The data on relaxation and phase transitions as well as the thermal decomposition of copolymers were obtained using the DSC method.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Preparation Of 33-bis(nitratomethyl)oxetane and 3-azidomethmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy‐Intensive Random Block Copolymers of 3,3‐Bis (Nitratomethyl) Oxetane and 3‐Azidomethyl‐3‐ Methyloxetane

Mukhametshin

Sharipov

Петров

et al. 2018

Propellants Explo Pyrotec

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Energetic Polymers: A Chance for Lightweight Reactive Structure Materials?

Born

Plank

Klapötke

2022

Propellants Explo Pyrotec

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Today's ammunition still consists of about 70 wt% structure‐providing materials such as metals providing no energetic contribution. Therefore, reactive structure materials (RSMs) offer tremendous room for improvement. While current research focuses on rather heavy, metal‐based materials (e. g., alloys, thermites), energetic polymers appear as an under‐recognized opportunity for very lightweight RSMs. Unfortunately, suitable polymers are unavailable as energetic polymer research has almost exclusively focused on elastic binders with the least possible glass transition temperature. An application as RSM, however, requires rigid polymers with a glass transition above operational temperatures. Accordingly, monomers with fundamentally different structures are required. The first step in this particular direction is 3‐(2,4,6‐trinitrophenoxy)oxetane (TNPO). Herein, we report the synthesis of its homopolymer and investigate its polymerization behavior by copolymerization with prior art energetic oxetanes. All polymers were intensively studied by vibrational and multinuclear (1H, 13C, 14N) NMR spectroscopy, elemental analysis, gel permeation chromatography, and differential scanning calorimetry (DSC). Hereby, DSC revealed the high effect of the TNPO repeating unit on the glass transition temperature. The performance of all polymers was calculated using the EXPLO5 code to evaluate the potential performance range of polymeric RSMs. Further, their shock and friction sensitivity was determined by BAM standard procedures.

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