Study on the Curing System of Polytriazole Adhesive for Composite Solid Propellant

Liu, Fangbo; Zhang, Xilong; Jiang, Wusheng; Yu, Fangyuan; Deng, Jiyong

doi:10.1002/prep.201700280

Cited by 16 publications

(7 citation statements)

References 23 publications

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“…In order to explore the influences of different curing parameter (Rt), hard segment content (H%) and crosslinker agent content (C%) on the mechanical properties of materials, modified material formulations were designed according to eqs. , , , , and . Wherein, Rt represents the curing parameter of material; H% means the weight percentage of rigid structure in curing system; C% signifies the weight percentage of crosslinker in curing system, and m All is the total mass.

{Rt}_{L} = \frac{n_{Dienophile}}{n_{Diene}} = \frac{2 n_{BMI}}{2 n_{PADGF} + 2 n_{FPDF}}

H_{L} % = \frac{m_{BMI} + m_{FPDF}}{m_{All}} \times 100 %

{Rt}_{C} = \frac{n_{Dienophile}}{n_{Diene}} = \frac{2 n_{BMI}}{2 n_{PADGF} + 2 n_{FPDF} + 3 n_{NF}}

H_{C} % = \frac{m_{BMI} + m_{FPDF} + m_{NF}}{m_{All}} \times 100 %

C % = \frac{m_{NF}}{m_{All}} \times 100 %

…”

Section: Methodsmentioning

confidence: 99%

Relationship on structure and properties of polyurethane modified Diels–Alder addition polymer

Liu

et al. 2018

J of Applied Polymer Sci

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A series of linear and crosslinked polyurethane modified materials were prepared by Diels-Alder cycloaddition reaction. Based on raw materials, some novel equations were designed and effects of equation parameters on the mechanical properties of modified material were explored. It was demonstrated that tensile strength of modified materials and elongation at break were changed from 3.68 to 18.71 MPa, 200 to 866%, respectively. In addition, the optimal reaction temperature of retro-Diels-Alder (r-DA) reaction was determined by differential scanning calorimeter (DSC). Gel permeation chromatography (GPC) and tensile experiments were used to characterize the properties of repolymerized material after degradation. The results indicated the optimal temperature of r-DA for linear and crosslinked polyurethane modified materials is 127 and 150 C. Moreover, after decomposed, the product was slowly repolymerized at 60 C, and can more effectively restore material strength under the action of the solvent to achieve self-healing effect.

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{Rt}_{L} = \frac{n_{Dienophile}}{n_{Diene}} = \frac{2 n_{BMI}}{2 n_{PADGF} + 2 n_{FPDF}}

H_{L} % = \frac{m_{BMI} + m_{FPDF}}{m_{All}} \times 100 %

{Rt}_{C} = \frac{n_{Dienophile}}{n_{Diene}} = \frac{2 n_{BMI}}{2 n_{PADGF} + 2 n_{FPDF} + 3 n_{NF}}

H_{C} % = \frac{m_{BMI} + m_{FPDF} + m_{NF}}{m_{All}} \times 100 %

C % = \frac{m_{NF}}{m_{All}} \times 100 %

…”

Section: Methodsmentioning

confidence: 99%

Relationship on structure and properties of polyurethane modified Diels–Alder addition polymer

Liu

et al. 2018

J of Applied Polymer Sci

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“…Polymeric binders are one of the important components of solid propellants, and they can bind numerous metallic fuels together with oxidizers, plasticizers, and other additives to form integration in solid propellants [ 1 , 2 , 3 ]. In addition, the integrated structure must be prepared into a certain shape that can withstand a certain degree of stress.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Random Block Hydroxyl-Terminated Polyfluoroether-Based Polyurethane Elastomers with Fluorine-Containing Side Chains

et al. 2023

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Polype ntafluoropropane glycidyl ether (PPFEE), a new random block hydroxyl-terminated polyfluoroether, was synthesized successfully by cationic ring-opening polymerization of 2-(2,2,3,3,3-pentafluoropropoxymethyl) oxirane, and its molecular structure was confirmed by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectrometry, and gel permeation chromatography. The PPFEE-based polyurethane elastomers featuring fluorine in their side chains were prepared using PPFEE as soft segments, polyisocyanate polyaryl polymethylene isocyanate as hard segments, and dibutyltin dilaurate as catalysts under different curing conditions. The microphase separation, mechanical performance, and thermal behavior of the elastomers were investigated by differential scanning calorimetry, uniaxial tensile test, and thermal gravimetric analysis, respectively. Based on the results, the percentage of hard segments dissolved into the soft segments of elastomers was opposite to the change in breaking strength. The PPFEE-based polyurethane elastomer cured with 20 wt% PAPI at the curing temperature of 50 °C displayed the maximum tensile elongation of 2.26 MPa with an elongation at break of nearly 150%. The increased contents of PAPI can effectively strengthen the tensile strength, and the maximum tensile elongation was 3.04 MPa with an elongation at break of nearly 90% when the content of PAPI was 26 wt%. In addition, the PPFEE-based polyurethane elastomers exhibited excellent resistance to thermal decomposition and a sharp weight loss temperature at around 371 °C. All the results demonstrated that the PPFEE may be a potential polymeric binder as one of the ingredients applied to future propellant formulations.

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“…Kristensen group has successfully used this approach to prepare isocyanate-free elastomer [8]. Deng's teams have applied polytriazole curing system to solid composite propellant research [9]. Our team also has carried out a systematic study of the application of the click chemical curing system in solid composite propellants [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Glycidyl Azide Polymer Grafted Tetrafunctional Isocyanate on Polytriazole Polyethylene Oxide-Tetrahydrofuran Elastomer and its Propellant Properties

Tang

et al. 2020

Polymers

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A new energetic curing reagent, Glycidyl azide polymer grafted tetrafunctional isocyanate (N100-g-GAP) was synthesized and characterized by FT-IR and GPC approaches. Polytriazole polyethylene oxide-tetrahydrofuran (PTPET) elastomer was prepared by N100-g-GAP and alkynyl terminated polyethylene oxide-tetrahydrofuran (ATPET). The resulting PTPET elastomer was fully characterized by TGA, DMA, FTIR and mechanical test. The above analysis indicates that PTPET elastomers using N100-g-GAP as curing reagent have the potential for use in propellants. The overall formulation test of the composite propellants shows that this curing system can effectively enhance mechanical strength and bring a significant improvement in the interface interaction between the RDX & AP particles and binder matrix.

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Study on the Curing System of Polytriazole Adhesive for Composite Solid Propellant

Cited by 16 publications

References 23 publications

Relationship on structure and properties of polyurethane modified Diels–Alder addition polymer

Relationship on structure and properties of polyurethane modified Diels–Alder addition polymer

Synthesis and Characterization of Random Block Hydroxyl-Terminated Polyfluoroether-Based Polyurethane Elastomers with Fluorine-Containing Side Chains

The Effect of Glycidyl Azide Polymer Grafted Tetrafunctional Isocyanate on Polytriazole Polyethylene Oxide-Tetrahydrofuran Elastomer and its Propellant Properties

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