Simulation and Experimental on the Solvation Interaction between the GAP Matrix and Insensitive Energetic Plasticizers in Solid Propellants

Zhao, Yu; Zhang, Xiaohong; Zhang, Wei; Xu, Huaimin; Xie, Wuxi; Du, Jiaojiao; Liu, Yingzhe

doi:10.1021/acs.jpca.5b10540

Cited by 33 publications

(19 citation statements)

References 28 publications

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“…Low-field NMR can be used to study the crosslinked network structure of PU [22][23][24][25][26][27]. The principle for measuring the crosslink density of PU by LF-NMR is as follows.…”

Section: Crosslinking Networkmentioning

confidence: 99%

Effect of Mixed Isocyanate Curing Agents on the Performance of In Situ‐Prepared HTPE Binder Applied in Propellant

Chen

Yuan

Wen

et al. 2021

Propellants Explo Pyrotec

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A novel hydroxyl‐terminated block copolymer (HTPE) binder was prepared through an in situ preparation method to replace the traditional HTPE binder. The preparation method is less costly and bypasses the preparation of the HTPE prepolymer intermediate, thus avoiding the complicated prepolymer synthesis process. Uniaxial tensile testing, low‐field nuclear magnetic resonance, and infrared spectroscopy were used to investigate the mechanical properties, curing networks, and hydrogen bonding (H‐bonds) of the binder. The crosslink density (Ve) decreased with an increase in the ratio of −NCO in the IPDI to the total −NCO in the IPDI and N100 (χ). The proportion of H‐bonds formed by the imino groups increased with the IPDI content and reached 86.53 % at a χ value of 90 %, indicating a positive correlation between the H‐bonds and σm. Additionally, to study the pot life of the in situ‐prepared HTPE binder, the rheological properties of the curing reactions were studied. When the χ value was in the range of 50 %–90 %, the pot life of the binder met the composite propellant requirements for military applications. The thermal decomposition behaviors of the in situ‐prepared HTPE binder and the traditional HTPE binder were investigated by the coupling analysis of thermogravimetry‐Fourier transform infrared spectroscopy (TG‐FTIR), and the novel in situ‐prepared HTPE binder exhibited good thermal stability and superior energetic performance. Compared with the traditional HTPE‐based propellant, the mechanical properties of the in situ‐prepared‐HTPE‐based propellants were greatly improved. With these data, the in situ‐prepared HTPE binder has great potential for application in rocket propellant formulations.

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“…Low-field NMR can be used to study the crosslinked network structure of PU [22][23][24][25][26][27]. The principle for measuring the crosslink density of PU by LF-NMR is as follows.…”

Section: Crosslinking Networkmentioning

confidence: 99%

Effect of Mixed Isocyanate Curing Agents on the Performance of In Situ‐Prepared HTPE Binder Applied in Propellant

Chen

Yuan

Wen

et al. 2021

Propellants Explo Pyrotec

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“…Therefore, the T 2 values of hydrogen atoms can be used to characterize the degree of movement and crosslinking of polymer chains. In previous work 23,24 a crosslink density (XLD) analysis was done using an XLD regression model, and this model is used herein to determine the crosslink density. The expression of the XLD model is as follows:…”

Section: Crosslink Density Testmentioning

confidence: 99%

Improvement of mechanical properties of in situ-prepared HTPE binder in propellants

Chen

Wen

et al. 2020

RSC Adv.

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“…Solid propellant is the main energy source of a solid rocket, missile, and other weapons [1,2]. With the development of safer weapons, the formulation and application of high energy desensitive propellants that do not produce uncontrollable combustion and explosion upon impacting, rubbing, shockwave, heating stimuli, and other external stimuli have become a hot research topic [3].…”

Section: Introductionmentioning

confidence: 99%

Influences of Bu‐NENA and BDNPA/F Plasticizers on the Properties of Binder for High‐Energy NEPE Propellants

Wang

Rong

Zhang

et al. 2021

Propellants Explo Pyrotec

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Desensitized energetic plasticizer (DEP) plays a crucial role in the properties of the binder, and thus can further influence the performances of desensitive Nitrate Ester Plasticized Polyether (NEPE) propellants, which represents the development direction of the next generation solid propellant composites. However, at present, a study on influencing mechanisms for curing properties of propellant binders at the atomic and molecular level was rarely reported. In the current study, based on the curing kinetics and mechanical properties of PET/N-100 binder, the influencing mechanism of the DEPs, BDNPA/F, and Bu-NENA, on the binder was determined by the Gaussian quantum chemical calculation and MD simulation at the chemical bond and polymer chain levels, as well as the characterizations of the curing network structure, glass transition temperature, and microphase separation of the binder system. The consistent results at both micro and macro levels offer important theoretical guidance for studying the structure-mechanism-performance relationship of propellant binder, as well as for exploring the strategies that can reveal the curing mechanism of the binder system in depth.

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Simulation and Experimental on the Solvation Interaction between the GAP Matrix and Insensitive Energetic Plasticizers in Solid Propellants

Cited by 33 publications

References 28 publications

Effect of Mixed Isocyanate Curing Agents on the Performance of In Situ‐Prepared HTPE Binder Applied in Propellant

Effect of Mixed Isocyanate Curing Agents on the Performance of In Situ‐Prepared HTPE Binder Applied in Propellant

Improvement of mechanical properties of in situ-prepared HTPE binder in propellants

Influences of Bu‐NENA and BDNPA/F Plasticizers on the Properties of Binder for High‐Energy NEPE Propellants

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