Thermal, mechanical and morphological properties of plasticized polyurethane binders based on PEG and HTPB blends

Zarei, Mohammad; Bayat, Yadollah; Oskueyan, Ghasem

doi:10.1080/10601325.2022.2108442

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…GAP-based solid propellants showed enhanced mechanical and thermal properties with the incorporation of PEG [ 19 ], especially since the GAP/PEG propellant was much softer. PEG improved the compatibility of plasticizers with HTPB/PEG polyurethane matrices and increased the modulus and tensile strength of these IPN binders [ 20 ]. Additionally, graft semi-IPNs that were interpenetrated with PEG8000 and acrylic copolymers showed high thermal and cycling stability with excellent shape solidity and no change in crystallization properties compared to the pristine PEG8000 [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamic Simulations and Experiments Study on the Mechanical Properties of HTPE/PEG Interpenetrating Polymer Network (IPN) Binders

Shi¹,

Fu²,

Li³

et al. 2023

Nanomaterials

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The mechanical properties of HTPE/PEG interpenetrating polymer network (IPN) binders were systemically studied with molecular dynamics (MDs) simulations and experiments. In this study, an algorithm was used to construct the crosslinking interpenetrating polymer network models and then the mechanical behaviors of Hydroxyl-terminated polyethylene glycol-tetrahydrofuran co-polyether/poly ethylene glycol (HTPE/PEG) IPN models were analyzed at a molecular scale. Firstly, glass transition temperatures (Tg), mean square displacement (MSD) and mechanical properties of IPN crosslinked model simulations showed that better thermomechanical parameters appeared at low temperatures, which were in good agreement with the experimental methods, including dynamic mechanical analysis and uniaxial tensile. Then bond-length distribution was performed to verify the crosslinked structures between prepolymers and curing agents. FTIR-ATR spectra analysis of four IPN binder specimens also gave a convictive result to the special interpenetrating polymer network of polyether polyurethane binders. Cohesive energy density and friction-free volume explained how the micro-structures of IPN crosslinked models and the force of inter-molecule chains affected the mechanical behaviors of the HTPE/PEG polyurethane matrix. Lastly, the morphology of IPN binder specimen tensile fracture indicated the mechanism at different temperatures. These studies were helpful in understanding the mechanical properties of HTPE/PEG interpenetrating polymer network binders and provide molecular insight into mechanisms of mechanical behaviors, which would guide the property improvement of HTPE propellant.

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Section: Introductionmentioning

confidence: 99%

Molecular Dynamic Simulations and Experiments Study on the Mechanical Properties of HTPE/PEG Interpenetrating Polymer Network (IPN) Binders

Shi¹,

Fu²,

Li³

et al. 2023

Nanomaterials

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“…At present, researchers have carried out a large number of studies and analyses on the mechanical properties of HTPB propellants under different loading conditions using experimental and theoretical methods [9][10][11][12][13]. Zarei et al [14] conducted a study on the mechanical properties of HTPB, and the results showed that the addition of polyethylene glycol (PEG) improved the compatibility of the plasticizer with the polyurethane (PU) matrices. The addition of PEG increased the modulus and tensile strength, while the addition of plasticizer decreased the modulus and increased the tensile strength and elongation.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Properties and Failure Mechanisms of Highly Filled Hydroxy-Terminated Polybutadiene Propellant under Different Tensile Loading Conditions

Wu,

Lu,

Jiang

et al. 2023

Polymers

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To study the mechanical properties of highly filled hydroxy-terminated polybutadiene (HTPB) propellant with 90 wt% solid fillers, the stress–strain curves of the propellant under different temperatures (−50 to 70 °C) and strain rates (0.000476 to 0.119048 s−1) were obtained by uniaxial tensile test. Moreover, to obtain the glass transition temperature and understand the effect of low temperatures on the mechanical properties of the propellant, DMA experiments were carried out. On this basis, the mechanical response laws of the propellant were analyzed, and the master curves of mechanical properties were established. Furthermore, the fracture features of the propellant under typical loading conditions were obtained by SEM, and the corresponding failure mechanisms were analyzed. The results show that the maximum strength decreases with increasing temperature, while the maximum elongation increases with increasing temperature at the same strain rate. The maximum tensile strength increases with increasing strain rate, while the maximum elongation decreases with increasing strain rate at the same temperature. The maximum tensile strength is lowest with a value of 0.35 MPa when the temperature is 343.15 K and the strain rate is 0.000476 s−1, at which time the maximum elongation reaches the highest with a value of 44%. In terms of failure mechanisms, the propellant shows no particle fracture, and the failure modes of the propellant are mainly matrix tearing and dewetting.

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Unraveling the potential of polydopamine-assisted photoresponsive polyurethanes for industrial and biomedical applications

ََAmini Jahromi,

Farahavar,

Nasiri Zarandi

et al. 2024

Journal of Industrial and Engineering Chemistry

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Thermal, mechanical and morphological properties of plasticized polyurethane binders based on PEG and HTPB blends

Cited by 5 publications

References 34 publications

Molecular Dynamic Simulations and Experiments Study on the Mechanical Properties of HTPE/PEG Interpenetrating Polymer Network (IPN) Binders

Molecular Dynamic Simulations and Experiments Study on the Mechanical Properties of HTPE/PEG Interpenetrating Polymer Network (IPN) Binders

Study on Mechanical Properties and Failure Mechanisms of Highly Filled Hydroxy-Terminated Polybutadiene Propellant under Different Tensile Loading Conditions

Unraveling the potential of polydopamine-assisted photoresponsive polyurethanes for industrial and biomedical applications

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