Synthesis and characterization of poly(3,3 bis(azidomethyl)oxetane-co-?-caprolactone)s

Jutier, Jean-Jacques; Gunzbourg, Anémone De; Prud’homme, Robert E.

doi:10.1002/(sici)1099-0518(19990401)37:7<1027::aid-pola17>3.0.co;2-b

Cited by 26 publications

(26 citation statements)

References 20 publications

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“…For the copolymerization of tetrahydrofuran with 3,3-dimethyloxetane, r 1 (0.13) and r 2 (8.1), respectively, and the r 1 r 2 product is 1.0 again consistent with near-ideal selectivity [40]. Copolymerization of 3,3-bis(chloromethyl)oxetane with 3-caprolactone reveals an alternating tendency with r 1 (0.26) and r 2 (0.48), respectively, an r 1 r 2 product of 0.13 [41]. We have reported a nearly random monomer distribution for copolymerization of 3-methoxyethoxyethoxy-3-methyloxetane, ME2Ox, (r 1 , 1.65) and 5FOx (r 2 , 0.49) an r 1 r 2 Z0.81 in methylcyclohexane [28].…”

Section: Monomer Reactivity Ratiossupporting

confidence: 59%

Ring opening polymerization of 3-semifluoro- and 3-bromomethyloxetanes to poly(2,2-substituted-1,3-propylene oxide) telechelics for soft blocks in polyurethanes

Makal

Uilk

Kurt

et al. 2005

Polymer

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Section: Monomer Reactivity Ratiossupporting

confidence: 59%

Ring opening polymerization of 3-semifluoro- and 3-bromomethyloxetanes to poly(2,2-substituted-1,3-propylene oxide) telechelics for soft blocks in polyurethanes

Makal

Uilk

Kurt

et al. 2005

Polymer

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“…Limited by experimental method and under safety concerns, so far the studies on azido oxetane polymers are mainly focused on PAMMO and poly(3,3'-bisazidomethyloxetane)(PBAMO) in experiments [14][15][16][17][18][19][20][21][22][23][24][25]. To lower the glass transition temperatures of energetic binders on the present basis, there have been efforts modifying azido oxetane polymers.…”

Section: Introductionmentioning

confidence: 99%

“…Blending or copolymerizing azido oxetane polymers with flexible polymers such as HTPB and tetrahydrofuran (THF) could effectively lower the Tg and improve the mechanical properties under low temperatures [17][18][19], but the introduction of the non-energetic ingredients also results in less energy of the system. Copolymerizing or crosslinking with energetic polymers which have lower Tg could maintain the energy to the best extent [20][21][22][23][24][25]. For example, PBAMO can be modified by copolymerizing with PAM-MO [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Pendant Chains Are Not Just Decorations: Investigation of Structure‐Property Relationships of Azido Oxetane Polymers

Ma¹,

Liu²,

Yu³

et al. 2018

Propellants Explo Pyrotec

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The influence of the structure of azido oxetane polymers, i. e., the location, length and number of the pendant chains on their densities, enthalpies of formation, glass transition temperatures and mechanical properties of the polymers were investigated. The results show that the densities, enthalpies of formation and elastic moduli decrease monotonously as the number and length of the pendant chains increase. Glass transition temperatures has minimum values when there is one or two methane groups (−CH2) on the pendant chains. Moreover, the densities, elastic muduli and the enthalpies of formation increase with the introduction of azido groups. We found that the Tg of the polymers can be at best reduced by 17 K without compromising the energetic or mechanical performances. This study reveals the structure‐property relationships of the azido oxetane polymers and provides guidance on the principles of designing new energetic binders for explosives and rocket propellants.

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“…Oxetane-based polymers play an important role in the binding system of PBXs and solid propellants because of their special characteristics such as ability to control molecular weight, low polydispersity, polyfuctionality, and low glass transition temperature [1]. A number of energetic oxetane-based polymers were synthesized and their polymerization mechanism, combustion or pyrolysis process, physical and chemical performance were discussed [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition, Kinetics and Compatibility Studies of Poly(3‐difluoroaminomethyl‐3‐methyloxetane) (PDFAMO)

Pan

Wang

et al. 2014

Propellants Explo Pyrotec

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The thermal decomposition of poly(3‐difluoroaminomethyl‐3‐methyloxetane) (PDFAMO) with an average molecular weight of about 6000 was investigated using thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The kinetics of thermolysis were studied by a model‐free method. The thermal decomposition of PDFAMO occurred in a two‐stage process. The first stage was mainly due to elimination of HF and had an activation energy of 110–120 kJ mol−1. The second stage was due to degradation of the polymer chain. The Fourier transform infrared (FTIR) spectra of the degradation residues showed that the difluoroamino groups decomposed in a two‐step HF loss at different temperatures. The remaining monofluoroimino groups produced by the incomplete elimination of HF were responsible for the two‐stage thermolysis process. The compatibility of PDFAMO with some energetic components and inert materials used in polymer‐bonded explosives (PBXs) and solid propellants was studied by DSC. It was concluded that the binary systems of PDFAMO with cyclotrimethylenetrinitramine (RDX), 2,4,6‐trinitrotoluene (TNT), 2,4‐dinitroanisole (DNAN), pentaerythritol tetranitrate (PETN), ammonium perchlorate (AP), aluminum powder (Al), aluminum oxide (Al2O3) and 1,3‐diethyl‐1,3‐diphenyl urea (C1) were compatible, whereas the systems of PDFAMO with lead carbonate (PbCO3) and 2‐nitrodiphenylamine (NDPA) were slightly sensitized. The systems with cyclotetramethylenetetranitroamine (HMX), hexanitrohexaazaisowurtzitane (CL‐20), 3‐nitro‐1,2,4‐triazol‐5‐one (NTO), ammonium nitrate (AN), magnesium powder (Mg), boron powder (B), carbon black (C. B.), diphenylamine (DPA), and p‐nitro‐N‐methylamine (PNMA) were incompatible. The results of compatibility studies fully supported the suggested thermal decomposition mechanism of PDFAMO.

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Synthesis and characterization of poly(3,3 bis(azidomethyl)oxetane-co-?-caprolactone)s

Cited by 26 publications

References 20 publications

Ring opening polymerization of 3-semifluoro- and 3-bromomethyloxetanes to poly(2,2-substituted-1,3-propylene oxide) telechelics for soft blocks in polyurethanes

Ring opening polymerization of 3-semifluoro- and 3-bromomethyloxetanes to poly(2,2-substituted-1,3-propylene oxide) telechelics for soft blocks in polyurethanes

Pendant Chains Are Not Just Decorations: Investigation of Structure‐Property Relationships of Azido Oxetane Polymers

Thermal Decomposition, Kinetics and Compatibility Studies of Poly(3‐difluoroaminomethyl‐3‐methyloxetane) (PDFAMO)

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