Synthesis of a new polyurethane-based liner modified by carbon nanotube to prevent plasticizer migration

Farajpour, Tohid; Moradi, Saeid; Rezaei-Vahidian, Hadi

doi:10.1007/s00289-021-03648-3

Cited by 8 publications

(8 citation statements)

References 26 publications

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“…The inorganic fillers can increase the density of the insulation, block the cross-linked mesh, and reduce the free volume of the material, which has a good effect on the inhibition of NG migration [ 14 , 15 ]. Tohid Farajpour et al [ 16 ] fabricated a liner containing carboxylated carbon nanotube (CNT), which they utilized to reduce the migration of dioctylphthalate (DOP). They concluded that CNT prevents the migration of DOP by electrostatic interaction.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Zhu

Zhang

et al. 2023

Polymers

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The excessive migration of small molecular plasticizers in solid propellants may lead to debonding and changes in combustion characteristics, affecting the safety of solid rocket motors. Herein, two functionalized graphene oxides (GO) were used to enhance the anti-migration performance of EPDM insulation. GO, 3-Aminopropyltriethoxysilane-modified GO (AGO) and octadecylamine-modified GO (HGO) were filled into EPDM to fabricate EPDM insulation. The anti-migration properties and migration kinetics of EPDM insulations were studied using immersion tests. Moreover, the mechanical properties, including the tensile properties, crosslink density, hardness, and aging resistance of different EPDM insulations, were also explored. Compared with GO, AGO, and HGO obviously enhanced the anti-migration and mechanical properties of the EPDM insulations. This study shows that the anti-migration performance of EPDM insulation can be enhanced by functionalized GO.

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Section: Introductionmentioning

confidence: 99%

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Zhu

Zhang

et al. 2023

Polymers

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“…proved that plasticizer migration directly influences on burn rate and tensile strength of the propellant [7]. In the case of migration from the propellant to the liner, the propellant becomes harder, and therefore mechanical properties, bonding strength, and glass transition temperature of both the propellant and liner are affected [8], [9]. Agrawal et al.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the performance of HTPB‐IPDI‐based polyurethane composite liner through effective carbon black dispersion**

Aslan,

Atalar,

Atınç Yılmaz

et al. 2023

Propellants Explo Pyrotec

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This study aims to improve the dispersion of Carbon Black (CB) filled Hydroxyl‐Terminated Polybutadiene (HTPB)‐Isophorone Diisocyanate (IPDI) based polyurethane liner by both adding a dispersant and developing a production process to obtain improved mechanical, rheological, thermal, and adhesion properties. Printex‐U (CB1) and Thermax N‐991 (CB2) carbon blacks were used as fillers. Three different dispersants, which are BYK 9076 (D1), BYK 9077 (D2), and BYK Silclean 3700 (D3) were added to the liner formulation at various amounts. BYK 9076 (D1) was found as the most effective dispersant due to its bifunctional chemical structure. By adding 2 wt.% of BYK 9076 (D1) dispersant to the polyurethane liner comprising 10 wt.% CB1, viscosity was reduced by 45 %, and tensile strength and elongation at break were improved from 1.77 MPa to 1.88 MPa and from 375 % to 385 % respectively. The dispersion of the CB in the polyurethane liner was further improved by the ultrasonication process and tensile strength and elongation at break were increased to 2.03 MPa and 425 %, respectively. This process also contributed to an improved Limiting oxygen index (LOI), elevating it from 20 % to 22 % initially and further by 25 % through ultrasonication. Scanning Electron Microscopy (SEM) verified that the addition of D1 dispersant and ultrasonication effectively reduced CB particle agglomeration. The migration of plasticizer was also assessed over 12 months through bonding testing, TGA, and FTIR analysis. It was noticed that the effective dispersion of CB particles made the liner more resistant to the plasticizer migration.

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“…Farajpour et al added carboxylated carbon nanotubes (CNT) into the polyurethane liner to prevent the migration of DOP plasticizer to EPDM insulator through electrostatic interaction. 9 Grythe et al determined the diffusion of small molecular weight substances (such as curing agents and plasticizers) in the liner/EPDM insulator to be in the range of 10 À17 m 2 /s and 10 À11 m 2 /s. The results showed that adding particulate fillers in the liner will reduce the diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, some researches have been proposed to reduce the migration level by use of barrier and incorporation of fillers. Farajpour et al added carboxylated carbon nanotubes (CNT) into the polyurethane liner to prevent the migration of DOP plasticizer to EPDM insulator through electrostatic interaction 9 . Grythe et al determined the diffusion of small molecular weight substances (such as curing agents and plasticizers) in the liner/EPDM insulator to be in the range of 10 −17 m 2 /s and 10 −11 m 2 /s.…”

Section: Introductionmentioning

confidence: 99%

Anti‐migration performance of EPDM composite improved by octadecylamine‐functionalized graphene oxide

Zhang

et al. 2022

J of Applied Polymer Sci

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In this paper, the ethylene propylene diene monomer (EPDM) was used as a composite matrix and octadecylamine-functionalized graphene oxide (GA) was applied as insulation nanofiller to prevent plasticizer migration. To study the anti-migration behavior of EPDM under plasticizer environment and different temperatures, we investigated the diffusion of dioctyl phthalate (DOP) in EPDM and its composites. The migration kinetics of DOP into EPDM composites with respect to filler and temperature were observed by the immersion absorption method. The process is dynamic and conforms to Fick's law. The composite show a 90% increase in tensile strength and 151% improvement in elongation at break by the addition of 5 phr filler of GA. Meanwhile, the EPDM/GA composite show an obviously improved anti-migration performance, compared to pure EPDM at different temperatures, the composite show a 22.68%, 17.35%, 14.95%, 7.63% increase. Well layer-structure of graphene offers a chance to improve the anti-migration performance of insulation.

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Synthesis of a new polyurethane-based liner modified by carbon nanotube to prevent plasticizer migration

Cited by 8 publications

References 26 publications

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Enhancing the Anti-Migration Performance and Mechanical Properties of EPDM Insulation through Functionalized GO

Enhancing the performance of HTPB‐IPDI‐based polyurethane composite liner through effective carbon black dispersion**

Anti‐migration performance of EPDM composite improved by octadecylamine‐functionalized graphene oxide

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