Thermomechanical characterization of thermoplastic polyimides to improve the chain collaboration via ureidopyrimidone endcaps

Nicholls, Alejandro Rivera; Perez, Yesenia; Pellisier, Matthew; Rodde, Arnaud; Lanusse, P.; Stock, John Allan; Kull, Ken; Eubank, Jarrod F.; Harmon, Julie P.

doi:10.1002/pen.25226

Cited by 3 publications

(3 citation statements)

References 47 publications

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“…To the best of our knowledge, few studies have incorporated high-performance polymers as reinforcement agents in PGP systems. High-performance polymers, such as all-aromatic polyamides and polyimides, provide an avenue toward improvements in fracture toughness, tensile strength, and thermal stability [ 80 , 81 , 82 , 83 , 84 , 85 , 86 ]. Additionally, the utilization of water-soluble, high-performance polymers eliminates the need for harmful solvents that are associated with non-aqueous composite material processing [ 87 , 88 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Water-Soluble Polymers on the Rheology and Microstructure of Polymer-Modified Geopolymer Glass-Ceramics

Migliore,

Hewitt,

Dingemans

et al. 2024

Materials

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This work explores the effects of rigid (0.1, 0.25, and 0.5 wt. %) and semi-flexible (0.5, 1.0, and 2.5 wt. %) all-aromatic polyelectrolyte reinforcements as rheological and morphological modifiers for preparing phosphate geopolymer glass–ceramic composites. Polymer-modified aluminosilicate–phosphate geopolymer resins were prepared by high-shear mixing of a metakaolin powder with 9M phosphoric acid and two all-aromatic, sulfonated polyamides. Polymer loadings between 0.5–2.5 wt. % exhibited gel-like behavior and an increase in the modulus of the geopolymer resin as a function of polymer concentration. The incorporation of a 0.5 wt. % rigid polymer resulted in a three-fold increase in viscosity relative to the control phosphate geopolymer resin. Hardening, dehydration, and crystallization of the geopolymer resins to glass-ceramics was achieved through mold casting, curing at 80 °C for 24 h, and a final heat treatment up to 260 °C. Scanning electron microscopy revealed a decrease in microstructure porosity in the range of 0.78 μm to 0.31 μm for geopolymer plaques containing loadings of 0.5 wt. % rigid polymer. Nano-porosity values of the composites were measured between 10–40 nm using nitrogen adsorption (Brunauer–Emmett–Teller method) and transmission electron microscopy. Nanoindentation studies revealed geopolymer composites with Young’s modulus values of 15–24 GPa and hardness values of 1–2 GPa, suggesting an increase in modulus and hardness with polymer incorporation. Additional structural and chemical analyses were performed via thermal gravimetric analysis, Fourier transform infrared radiation, X-ray diffraction, and energy dispersive spectroscopy. This work provides a fundamental understanding of the processing, microstructure, and mechanical behavior of water-soluble, high-performance polyelectrolyte-reinforced geopolymer composites.

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Section: Introductionmentioning

confidence: 99%

Effect of Water-Soluble Polymers on the Rheology and Microstructure of Polymer-Modified Geopolymer Glass-Ceramics

Migliore,

Hewitt,

Dingemans

et al. 2024

Materials

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“…Meanwhile, if polyimides could be reprocessed like polypropylene (PP) and polyethylene (PE), their range of use would be greatly enlarged. [1][2][3][4][5] At a glance, there is a variety of polyimides, especially in the high-tech field. This is due to the fact that ordinary plastics and polymers often fail to meet rigorous requirements for high-temperature resistance applications like aerospace vehicles, electronic devices, and medical instruments.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of thermoplastic polyimide based on 4′,4′—(oxybis (methylene)) bis ([1.1′- bipheny]3-amine) diamine

Lu,

Zhang,

Liu

et al. 2023

High Performance Polymers

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In this work, a new diamine was designed by connecting flexible structures such as ether bond and aliphatic carbon chain between benzene rings, and was synthesized and purified through simple reactions such as Suzuki reaction. Finally, a series of polyimide (PI) films were synthesized by copolymerization with 4.4`-diaminodiphenyl ether (ODA)\pyromellitic dianhydride (PMDA) in different proportions. We prepared polyimide films with new monomer copolymerization ratios of 1% (PI-1), 5% (PI-2), 10% (PI-3), and 20% (PI-4). The polyimide films showed excellent glass transition temperatures, which were attributed to their unique bent architectures. The mechanical and thermal properties of the thermosets were studied using tensile testing, static thermomechanical analysis (TMA), and thermogravimetric analysis (TGA). As the results, the films exhibited the optimal glass transition temperatures (317.56°C–381.91°C), and the component with the highest copolymerization ratio has a 15% decrease in glass transition temperature compared to the component without copolymerization. Moreover, PI-1-PI-4 showed good heat resistance in the N2 atmosphere. The temperatures corresponding to a 5% heat loss in the films (T5%) were 458.12 °C–548.75°C, respectively.

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“…The heterocyclic groups in PUs can improve their thermal resistance and mechanical properties, and further broaden their applications. [16][17][18][19] For example, the incorporation of imide and oxazolidinone significantly enhanced the thermal and mechanical properties of PUs due to the increased inter-chain attractions in hard segments. [20][21][22][23] Tetrazine groups can make PUs colored owing to the electron deficient aromatic structure.…”

Section: Introductionmentioning

confidence: 99%

Preparation, hydrogen bonding and properties of polyurethane elastomers with 1,2,3‐triazole units by click chemistry

Guo

Wang

2020

Polymer Engineering & Sci

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Two kinds of diols containing 1,2,3‐triazole units were synthesized through the azide‐alkyne cycloaddition reaction between propargyl alcohol and 1,4‐diazidobutane. One of the diols, (butane‐1,4/1,5‐diylbis[1H‐1,2,3‐triazole‐1,4/1,5‐diyl])dimethanol (BDTDO‐1), containing 1,4/1,5‐disubstituted 1,2,3‐triazole regioisomers, was directly prepared under thermal condition without Cu(I) catalyst. The other diol, (butane‐1,4‐diylbis[1H‐1,2,3‐triazole‐1,4‐diyl])dimethanol (BDTDO‐2), containing 1,4‐disubstituted 1,2,3‐triazoles, was prepared by Cu(I) catalyzed click chemistry. Then, two kinds of 1,2,3‐triazole modified polyurethane elastomers (PUEs) were prepared from the reaction of 4,4′‐methylenebis(phenyl isocyanate) and poly(tetramethylene ether) glycol, with BDTDO‐1 or BDTDO‐2 as the chain extender (CE). It was found that the introduction of 1,2,3‐triazoles and their substitution positions had significant influences on the hydrogen bonding, thermal and mechanical properties of PUEs. Compared with the PUE prepared from 1,4‐butanediol as the CE, the PUE containing symmetric 1,4‐disubstituted 1,2,3‐triazoles units in the main chains shows higher values of hydrogen bonding, physical crosslinking density, Young's modulus, tensile strength and melting temperature, while lower glass transition temperature, resulting from the rigid structure and the ability to form more hydrogen bonds. However, the introduction of asymmetric 1,4/1,5‐disubstituted 1,2,3‐triazole moieties decreases the values of hydrogen bonding, thermal and mechanical properties of PUE appreciably due to the destruction of the ordered structure of the hard segments.

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Thermomechanical characterization of thermoplastic polyimides to improve the chain collaboration via ureidopyrimidone endcaps

Cited by 3 publications

References 47 publications

Effect of Water-Soluble Polymers on the Rheology and Microstructure of Polymer-Modified Geopolymer Glass-Ceramics

Effect of Water-Soluble Polymers on the Rheology and Microstructure of Polymer-Modified Geopolymer Glass-Ceramics

Structure and properties of thermoplastic polyimide based on 4′,4′—(oxybis (methylene)) bis ([1.1′- bipheny]3-amine) diamine

Preparation, hydrogen bonding and properties of polyurethane elastomers with 1,2,3‐triazole units by click chemistry

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