Highly heat-resistant and mechanically strong co-crosslinked polyimide/bismaleimide rigid foams with superior thermal insulation and flame resistance

Sheng, Xianzhe; Yun, Shuhuan; Wang, Shengli; Gao, Yongsheng; Zuo, Xinzhang; Xing, Miao; Shi, Xuetao; Qin, Jianbin; Ma, Zhonglei; Zhang, Guangcheng

doi:10.1016/j.mtphys.2023.101154

Cited by 13 publications

(3 citation statements)

References 35 publications

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“…The SAC has also been increased by incorporating 4,4′-diaminodiphenyl ether, [64] adjusting molecular backbone design, [65] and designing co-crosslinked structure. [66] Polyurethane-based porous sound absorption materials have attracted much attention due to the characteristics of excellent damping effect, complicated microstructures, and sophisticated interconnected pores. They show large potential as excellent sound absorption materials, especially for applicating in theaters, conference rooms, vehicles, and recording studios.…”

Section: Porous Sound Absorption Materialsmentioning

confidence: 99%

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Dong,

Duan,

Chen

et al. 2024

Macromol. Rapid Commun.

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Various acoustic materials have been developed to resolve noise pollution problem in many industries. Especially, materials with porous structure have been broadly used to absorb sound energy in civil construction and transportation area. Polyurethane (PU) porous materials possess excellent damping properties, good toughness and well‐developed pore structures, which have a broad application prospect in sound absorption field. This work aimed to summarize the recent progress of fabrication and structure for PU porous materials in sound absorption application. The sound absorption mechanisms of porous materials were introduced. Different kinds of structure for typical PU porous materials in sound absorption application were covered and highlighted, which included PU foam, modified PU porous materials, aerogel, templated PU and special PU porous materials. Finally, the development direction and existing problems of PU material in sound absorption application were briefly prospected. It can be expected that porous PU with high sound absorption coefficient can be obtained by using some facile methods. The design and accurate regulation of porous structures or construction of multilayer sound absorption structure will be favorably recommended to fulfill the high demand of industrial and commercial applications in the future work.This article is protected by copyright. All rights reserved

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Section: Porous Sound Absorption Materialsmentioning

confidence: 99%

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Dong,

Duan,

Chen

et al. 2024

Macromol. Rapid Commun.

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“…The high temperature resistance of PI materials effectively prevents LED component fading or damage during operation. Furthermore, PI exhibits exceptional mechanical strength [ 19 , 20 , 21 ] and abrasion resistance, safeguarding LED components from external elements and prolonging the lifespan of LED screens. Its compatibility with high−temperature environments and high−frequency applications makes it a promising candidate for flexible circuit boards.…”

Section: Introductionmentioning

confidence: 99%

Adhesion and Transparency Enhancement between Flexible Polyimide-PDMS Copolymerized Film and Copper Foil for LED Transparent Screen

Wang,

Zhao,

et al. 2024

Polymers

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With the increasing demand for innovative electronic products, LED transparent screens are gradually entering the public eye. Polyimide (PI) materials combine high temperature resistance and high transparency, which can be used to prepare flexible copper-clad laminate substrates. The physical and chemical properties of PI materials differ from copper, such as their thermal expansion coefficients (CTEs), surface energy, etc. These differences affect the formation and stability of the interface between copper and PI films, resulting in a short life for LED transparent screens. To enhance PI-copper interfacial adhesion, aminopropyl-terminated polydimethylsiloxane (PDMS) can be used to increase the adhesive ability. Two diamine monomers with a trifluoromethyl structure and a sulfone group structure were selected in this research. Bisphenol type A diether dianhydride is a dianhydride monomer. All three of the above monomers have non−coplanar structures and flexible structural units. The adhesion and optical properties can be improved between the interface of the synthesized PI films and copper foil. PI films containing PDMS 0, 1, 3, and 5 wt% were analyzed using UV spectroscopy. The transmittance of the PI-1/3%, PI-1/5%, PI-2/3%, and PI-2/5% films were all more than 80% at 450 nm. Meanwhile, the Td 5% and Td 10% heat loss and Tg temperatures decreased gradually with the increase in PDMS. The peel adhesion of PI-copper foil was measured using a 180° peel assay. The effect of PDMS addition on peel adhesion was analyzed. PIs-3% films had the greatest peeling intensities of 0.98 N/mm and 0.85 N/mm.

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“…The commercial PMI foams generally show mass densities of 35–200 kg/m 3 , compression strengths of 0.4–6.4 MPa, and tensile strengths of 1.0–5.38 MPa. They represent a kind of special engineering foams with the best mechanical properties at present compared with the other rigid foams, such as polystyrene (PS), polyvinyl chloride (PVC), polyurethane (PU) foams, and polyimide (PI) foams. − Besides, due to their excellent mechanical properties and heat resistance, the PMI foams can withstand the mainstream thermal molding process of resin matrix composites, such as the autoclave curing molding process with a condition of 190 °C/0.35 MPa/2 h. In addition, they have good interface bonding interactions with the polymer matrix, such as cyanate, epoxy resin, bismaleimide resin, etc . As a result, PMI foams have been widely used as the core materials of sandwich-structured composites in areas of aerospace, ships, wind power, transportation, etc. − …”

Section: Introductionmentioning

confidence: 99%

Lightweight and High-Performance Polymethacrylimide Foams for Complex-Shaped Applications Based on the Highly Foamable Precursor Beads

Gao,

Zhang,

Zhang

et al. 2024

Ind. Eng. Chem. Res.

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Lightweight and high-performance complex-shaped polymeric foams are highly desirable for applications in aerospace, ships, wind power, transportation, etc. This work successfully synthesized the highly foamable P(MAA-co-MAN-co-tBMA) beads via aqueous suspension polymerization, which can be used as foamable precursors for the preparation of polymethacrylimide (PMI) foams by in-mold thermal foaming. For the synthesis of highly foamable P(MAA-co-MAN-co-tBMA) beads used as PMI precursor beads, the oil phase consists of methacrylic acid (MAA) and methacrylonitrile (MAN) as monomers with azodiisobutyronitrile (AIBN) as an initiator and tert-butyl methacrylate (tBMA) as a copolymerizable foaming agent, while the aqueous phase is composed of polyvinyl alcohol (PVA) as the dispersant, NaNO 2 as the aqueous phase inhibitor, and NaCl as a salting-out agent. The chemical structures, foaming behaviors, expansion ratio, and thermal properties of the foamable P(MAA-co-MAN-co-tBMA) beads were investigated in detail. The highly foamable P(MAA-co-MAN-co-tBMA) beads with an average bead diameter of 0.74 mm can be obtained, and their expansion ratio can reach as high as 50 upon free thermal foaming at 230 °C for 30 min. The lightweight and high-performance PMI foams with low mass densities of 60− 120 kg/m 3 , an outstanding thermal stability of 400 °C, an excellent compression strength of 0.69−2.20 MPa, and low compression creep deformations of 1.14−3.39% at the high temperature of 140 °C for 24 h were prepared via in-mold thermal foaming. Moreover, the scalable preparation of complex-shaped PMI foam products is demonstrated based on the highly foamable P(MAA-co-MAN-co-tBMA) beads, which is promising for applications in aerospace, ships, wind power, transportation, etc.

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Highly heat-resistant and mechanically strong co-crosslinked polyimide/bismaleimide rigid foams with superior thermal insulation and flame resistance

Cited by 13 publications

References 35 publications

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Adhesion and Transparency Enhancement between Flexible Polyimide-PDMS Copolymerized Film and Copper Foil for LED Transparent Screen

Lightweight and High-Performance Polymethacrylimide Foams for Complex-Shaped Applications Based on the Highly Foamable Precursor Beads

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