Investigation on Ultraviolet Absorption Properties, Migration, and Catalytic Performances of Ferrocene‐Modified Hyper‐Branched Polyesters

Xiao, Fang; Feng, Feifei; Li, Lanlan; Zhang, Dan

doi:10.1002/prep.201200126

Cited by 39 publications

(12 citation statements)

References 20 publications

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“…It is well known that the electrochemical reaction mechanism of a ferrocene‐based BR catalyst is closely linked with its combustion catalytic performance in solid propellants , . The redox properties of all new compounds in DMSO solution were thus investigated by cyclic voltammetry (CV).…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, many researchers have been taking every efforts to design and synthesize novel ferrocene derivatives and polymers to overcome the strong migration tendency of the tranditional neutral ferrocene‐based BRCs , . Of the reported ferrocene‐based BRCs, some are transition‐metal coordination compounds containing ferrocenylazoles synthesized by H. Y. Zhao and Y. F. Yuan and display high catalytic activity in the thermal decomposition of ammonium perchlorate (AP).…”

Section: Introductionmentioning

confidence: 99%

“…Of the reported ferrocene‐based BRCs, some are transition‐metal coordination compounds containing ferrocenylazoles synthesized by H. Y. Zhao and Y. F. Yuan and display high catalytic activity in the thermal decomposition of ammonium perchlorate (AP). [4b], [4c], [4d], [6a], [6b], [6c] We have also used 5‐ferrocenyl‐1H‐tetrazole (HFcTz) as a favorable ligand to study its coordination chemistry because it contains both ferrocenyl group and tetrazolyl ring, which are beneficial to a ferrocene‐based BRC and HFcTz can be readily deprotonated. We have therefore prepared a number of coordination compounds containing HFcTz or its anion previously and evaluated their catalytic performances in the thermal degradation of some energetic materials including AP, 1,3,5‐trinitro‐1,3,5‐triazacyclohexane (RDX), and 1,2,5,7‐tetranitro‐1,3,5,7‐tetraazacyclooctane (HMX) and the results showed that some coordination compounds exhibit samiliar catalytic activities like the well‐known ferrocene‐based BRC 2,2‐bis(ethylferrocenyl)propane (catocene).…”

Section: Introductionmentioning

confidence: 99%

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Ionic Ferrocenyl Coordination Compounds Derived from Imidazole and 1,2,4‐Triazole Ligands and Their Catalytic Effects During Combustion

Zhang

et al. 2018

Zeitschrift anorg allge chemie

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Alkylferrocene-based burning-rate catalysts (BRCs) show conspicuous migration tendency and volatility during prolonged storage and fabrication process of a composite solid propellant. To enhance anti-migration ability of the BRCs, forty novel ionic coordination compounds, [M(L) 4 (H 2 O) 2 ] m X n (M = Mn 2+ , Co 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Fe 2+ , Pb 2+ , Cr 3+ , Bi 3+ , or Cd 2+ ; L = ferrocenylmethyl imidazole or ferrocenylmethyl-1,2,4-triazole; X = picrate or trinitroresorcinolate), were synthesized and characterized by FT-IR, UV/Vis, and elementary analysis. Additionally, the crystal structures of six compounds were confirmed by single-crystal X-ray diffraction. The TG analyses revealed that the new compounds show high thermal stability. Cyclic voltammetry stud-ARTICLE Scheme 1. Molecular structure of the new ionic ferrocenyl transitionmetal coordination compounds. Experimental SectionMaterials and Equipment: AP, RDX, and HMX were provided by Xi'an Modern Chemistry Institute. N,N-Dimethylmethylferrocene was purchased from Meryer (Shanghai) Chemical Technology Co, Ltd. Both ferrocenylmethylimidazole and ferrocenylmethyl-1,2,4-triazole were synthesized as described previously. [7d,8] Additional reagents and chemicals were of AR grade and were used as received. Elemental analyses were performed with a Vario EL III Elemental Analyzer, Germany. DSC and TG studies were undertaken with a HS-1 model from Beijing Henven Scientific Instruments and Q50 model from TA of USA, respectively, operating at 5 K·min -1 in a nitrogen atmosphere (50 mL·min -1 ) with sample masses of ca. 3.0 mg. The UV/Vis absorption spectra of all the new compounds in DMSO solution (1.0 ϫ 10 5 mol·L -1 ) were recorded with a UV-2450 spectrophotometer (Shimadzu Corporation). Cyclic voltammograms were recorded with a CHI660C analyzer. Redox potentials were measured at a scan rate of 100 mV·s -1 in DMSO containing 0.1 mol·L -1 nBu 4 PF 6 as the supporting electrolyte. An Ag/Ag + reference electrode and a platinum working electrode were used. Prior to experiments, the system was purged with purified nitrogen gas to exclude dissolved oxygen from the solution. Synthesis of Compounds 1-40:The ligands ferrocenylmethyl-1,2,4triazole (FcMTz) and ferrocenylmethylimidazole (FcMIz) were used for the synthesis of compounds 1-20 and 21-40, respectively. Picric acid (PA) was employed in the synthesis of 1-10 and 21-30, trinitroresorcinol (TNR) was used in the preparation of 11-20 and 31-40. The transition metal salts used herein were sulfates of Mn 2+ , Co 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Fe 2+ and nitrates of Pb 2+ , Cr 3+ , Bi 3+ , Cd 2+ . The synthetic procedures for all the complexes were similar and the synthesis of 1 is detailed as a typical procedure. Meanwhile, during the preparation of the Pb II and Bi III compounds, 1 ϫ 10 -2 mol·L -1 nitric acid solution of their nitrates instead of their aqueous solution was used for proventing hydrolysis.To a 100 mL round-bottle flask containing an aqueous solution of MnSO 4 ·H 2 O (30 mL, 0.169 g, 1 mmol) whilst sti...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ionic Ferrocenyl Coordination Compounds Derived from Imidazole and 1,2,4‐Triazole Ligands and Their Catalytic Effects During Combustion

Zhang

et al. 2018

Zeitschrift anorg allge chemie

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“…Their results show that the simple and cheap technique, ultraviolet-visible spectroscopy method which requires no specimen preparation, is found to be correct enough. Since that time, the ultraviolet-visible spectroscopy method has been accepted in studying the migration of ferrocene-modified hyper-branched polyesters [50].…”

Section: Experimental Measurementmentioning

confidence: 99%

Review of the Adhesively Bonded Interface in a Solid Rocket Motor

Zhou

Chen

et al. 2015

The Journal of Adhesion

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One of the most challenging requirements in a solid rocket motor (SRM) is the integrity of the charge structure which is a multilayer adhesive joint involving the propellant, liner, and insulation. The propellant/liner/insulation interface is considered to be the weakest part of the whole structure. This interface has some of the usual features of an adhesively bonded interface, as well as its own special characteristics: the co-cured process, ingredient migration between interfaces, and complicated damage mechanisms. We give a technical and critical review of the past fifty years of existing research on many aspects of the propellant/liner/insulation interface in terms of the adhesive properties and adhesive mechanisms, ingredients migration, damage determination, and fracture analysis.To present a comprehensive outline of this interface we also clarify some remaining problems which should be addressed in the future. With significant improvements in the theoretical and experimental studies of the propellant/liner/insulation interface, the problem of integrity failure of the charge structure in SRM will be well resolved. Downloaded by [Cambridge University Library] at 07:15 14 August 2015 2

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“…In the view of that, the liquid organic iron compounds are applied, especially the liquid ferrocene derivatives. Catocene [3], a double-core liquid ferrocene derivative, is widely used as burning-rate catalyst of AP/Al/HTPB propellant for its high iron content, dispersibility and plasticizing effect.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Catocene in AP/Catocene Mixture at Low Temperature

Jiang¹,

Wang

2019

Propellants Explo Pyrotec

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The mixture of Catocene and fine AP after 175 °C heat treatment was washed by acetone and water, and the washing liquids of acetone and water were characterized by SP and microwave digestion‐ICP, and the solid products were characterized by XPS, XRD, SEM‐EDS. The results show that the oxidation of Catocene is a multi‐step reaction, and the final products are nano‐sized Fe2O3 and amorphous C. DTA‐TG test shows the productions can enhance the thermal decomposition of AP. Compared with the mixture of fine AP and Catocene, the mixture of fine AP and the final solid product of Catocene decomposition is insensitive to the impact. The effective constituents of Catocene catalysis for thermal decomposition of AP are nano‐sized Fe2O3 and amorphous C. Analyzing by synthesis, the final solid product may be an effective and safe catalyst for AP based propellant.

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Investigation on Ultraviolet Absorption Properties, Migration, and Catalytic Performances of Ferrocene‐Modified Hyper‐Branched Polyesters

Cited by 39 publications

References 20 publications

Ionic Ferrocenyl Coordination Compounds Derived from Imidazole and 1,2,4‐Triazole Ligands and Their Catalytic Effects During Combustion

Ionic Ferrocenyl Coordination Compounds Derived from Imidazole and 1,2,4‐Triazole Ligands and Their Catalytic Effects During Combustion

Review of the Adhesively Bonded Interface in a Solid Rocket Motor

Oxidation of Catocene in AP/Catocene Mixture at Low Temperature

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