Bis(azidomethyl) oxetane/hydroxyl‐terminated polybutadiene/bis(azidomethyl) oxetane triblock copolymer: Synthesis and characterization

Reddy, T. Sreekantha; Nair, J. K.; Satpute, R. S.; Wagh, R. M.; Sikder, A. K.; Venugopalan, S.

doi:10.1002/app.26572

Cited by 13 publications

(10 citation statements)

References 5 publications

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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%

“…To lower the glass transition temperatures of energetic binders on the present basis, there have been efforts modifying azido oxetane polymers. 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].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

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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“…A common diisocyanate to cure is isophorone diisocyanate (IPDI). Accordingly, the rheological properties of the HTPB binder have been examined by various researchers 1–8…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic and thermal decomposition behaviors of polytetrahydrofuran binder prepared using glycerin as a crosslinking modifier

Kohga

Naya

Shioya

2012

J of Applied Polymer Sci

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Polytetrahydrofuran (PTHF) is an effective binder ingredient used for improving the performance of propellants. PTHF becomes sufficiently rubbery for use as a binder with the addition of an adequate crosslinking modifier. This study investigated the viscoelastic and thermal decomposition behaviors of the PTHF binder prepared using glycerin as a crosslinking modifier, as well as the influence of the molecular weight of PTHF on the characteristics of the PTHF binder. The curing behavior of the PTHF binder was suitable for the manufacture of propellants, and the superior tensile properties of the PTHF binder made it suitable for use as a propellant binder. The degree of crosslinking of the samples decreased as the molecular weight of the PTHF increased. The PTHF binder has unique dynamic mechanical properties owing to its melting and chemical structure, and these properties were dependent on the molecular weight of PTHF. The glass transition temperature (T g ) and the loss tangent at T g decreased as the molecular weight of the PTHF increased. The temperature and frequency dependence of the PTHF binder were influenced by the melting point of PTHF. The viscoelastic properties of the binder prepared using PTHF with a molecular weight of 650 followed the time-temperature superposition principle. The activation energy for the relaxation of this binder varied remarkably at the melting point of PTHF. The thermal decomposition behavior indicated that at low temperatures, the consumption rate of the binder with low-molecular-weight PTHF was slightly larger than that of the binder with high-molecular-weight PTHF.

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“…During the past 4 decades, a large number of energetic binders that can, or might, find applications in propellants or plastic‐bonded explosives have been synthesized and examined. They include azido polymers,3–14 nitrate ester polymers,15–20 and aliphatic and aromatic nitro polymers 21, 22. Nevertheless, almost all of the efforts have been in the investigation of azido polymers and nitrate ester polymers.…”

Section: Introductionmentioning

confidence: 99%

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

Jin

Dong

Peng

et al. 2011

J of Applied Polymer Sci

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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.

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Bis(azidomethyl) oxetane/hydroxyl‐terminated polybutadiene/bis(azidomethyl) oxetane triblock copolymer: Synthesis and characterization

Cited by 13 publications

References 5 publications

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

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

Viscoelastic and thermal decomposition behaviors of polytetrahydrofuran binder prepared using glycerin as a crosslinking modifier

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

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