Structure and properties of novel PMDA/ODA/PABZ polyimide fibers

Ge, Gao; Liang, Dong; Li, Xiangyang; Ye, Guangdou; Gu, Yi

doi:10.1002/pen.21036

Cited by 44 publications

(29 citation statements)

References 30 publications

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“…Guanqun Gao et al . prepared a series of copolyimide (co‐PI) fibers containing benzimidazole moieties in the polyimide main chains, when the diamine ratio of 2‐(4‐aminophenyl)−5‐aminobenzimidazole was 70%, the tensile strength reached 1.53 GPa, which was almost three times over that of the PMDA/ODA PI fibers . Zhuang et al .…”

Section: Introductionmentioning

confidence: 99%

“…Qingming Xia et al synthesized and prepared the high-performance PI films based on 6,4 0 -diamino-2-phenylbenzimidazole. The obtained poly(benzimidazole-imide) films possessed good mechanical properties of tensile strength of 222-232 MPa and modulus of 3.1-5.6 GPa.70%, the tensile strength reached 1.53 GPa, which was almost three times over that of the PMDA/ODA PI fibers 29. Zhuang et al prepared the PI films containing benzoxazole moieties with tensile strength of 233.64-325.79 MPa 11.…”

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confidence: 99%

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High‐performance copoly(benzimidazole‐benzoxazole‐imide) fibers: Fabrication, structure, and properties

Luo

Zheng

Huang

et al. 2015

J of Applied Polymer Sci

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Novel high‐performance copolyimide (co‐PI) fibers containing benzimidazole and benzoxazole ring in the main chain were prepared by a two‐step spinning via the poly(amic acid)s. Effects of the incorporated benzimidazole and benzoxazole units on the micro‐structure and properties of co‐PI fibers were investigated. Fourier transform infrared (FTIR) results indicated that hydrogen bonding is formed in the co‐PI fibers. The co‐PI fibers exhibited discernible crystallization peaks at 14°∼15° and 23°∼26° (2θ), showing crystalline‐like structure. Moreover, the packing type of benzimidazole‐imide units determined the macromolecules packing of co‐PIs. It was amazedly found that the co‐PI fibers exhibited higher tensile strength and initial modulus than those of corresponding homo‐PI fibers, reaching tensile strength of 2.2–2.6 GPa, initial modulus of 99.1–113.2 GPa. The results of dynamic mechanical analysis (DMA) indicated co‐PI2 fiber had a positive Tg deviation due to the presence of strong intermolecular hydrogen bonding between benzimidazole‐imide and benzoxazole‐imide units, which maybe lead to the effective stress transfer between benzimidazole‐imide units and benzoxazole‐imide units. In addition, the obtained PI fibers exhibited excellent thermal properties with the 10% weight loss temperatures under N2 in the range of 574–585°C. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42001.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

High‐performance copoly(benzimidazole‐benzoxazole‐imide) fibers: Fabrication, structure, and properties

Luo

Zheng

Huang

et al. 2015

J of Applied Polymer Sci

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“…Regarding the peak temperature in the loss modulus curve as Tg, the Tgs of PI-0, PI-1, PI-2,PI-3, PI-4 and PI-5 are 388.69°C, 387.90°C, 398.49°C, 391.07°C, 404.68°C and 409.16°C respectively. Additionally during the glass transition, there is energy consumption in chain segments motion and Tanδ represents the energy consumption under stress of different frequency [18]. As shown in Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Preparation and characterization of novel polyimide films containing amide groups

et al. 2011

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A novel diamine monomer 4-amino-N-(4-aminophenyl)-benzamide (DABA) containing amide group was introduced to modify the polyimide of pyromellitic dianhydride (PMDA) and 4, 4′-oxydianiline (ODA) by copolymerization. A series of homo-and co-polyamic acid were synthesized by DABA and ODA in different molar ratio with PMDA, and polyimide films were obtained by thermal imidization. The films were characterized by tensile testing, dynamic mechanical analysis (DMA), thermal gravimetry analysis (TGA), fourier transform infrared (FTIR) and wide x-ray diffraction (WAXD). All of the obtained polyimide films show excellent mechanical properties and thermal stability. With the content of DABA increasing from 0% to 100%, the tensile strength and initial modulus are highly improved from 124.72 MPa and 4.70 GPa to 286.46 MPa and 22.06 GPa respectively. The polyimides have 5% weight loss temperature in the range of 530.0-555.5°C. The glass transition temperatures are in the range of 387.90-409.16°C and the tanδ values decrease from 0.3721 to 0.08316. The results of WAXD and FTIR indicate that the introduction of DABA containing amide group can improve the order degree of macromolecule and form hydrogen bonds between the main chains, which results in the improvement of mechanical properties.

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“…The first one is the one‐step technology, in which PI is synthesized via the polycondensation reaction of dianhydrides with various aromatic diamines in phenolic solvents, and the solution dopes are directly used to fabricate PI fibers. Generally, the prepared fibers possess good mechanical properties . However, the limitation of monomer selection and the toxicity of the phenolic solvents severely hindered the large‐scale production of PI fibers.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of polyimide fibers containing benzimidazole and Amide Units

Yin

Dong

Zhang

et al. 2014

J Polym Sci B Polym Phys

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Co‐polyimide (co‐PI) fibers with outstanding mechanical properties were fabricated via thermal imidization of polyamic acids, derived from a new design of combining the amide and benzimidazole diamine monomers, 4‐amino‐N‐(4‐aminophenyl)benzamide (DABA) and 2‐(4‐aminophenyl)‐5‐aminobenzimidazole (BIA), with 3,3′,4,4′‐biphenyltetracarboxylic dianhydride (BPDA). The crystalline structure and micromorphology of the prepared co‐PI fibers were investigated by synchrotron wide‐angle X‐ray diffraction (WAXD) and small‐angle X‐ray scattering (SAXS). The two‐dimensional WAXD spectra imply that the co‐PI fibers possess a structure between smectic‐like and three‐dimensionally ordered crystalline phase, and all the obtained fibers are highly oriented along the fiber axis. SAXS patterns exhibit a pair of meridional scattering streaks for the homo‐PI (BPDA/BIA) fiber, suggesting the presence of periodic lamellar structure. The incorporation of DABA into the polymer chains destroyed the lamellar structure but led to smaller size of microvoids upon increasing DABA moiety, based on SAXS analysis. The co‐PI fibers, with the molar ratio of BIA/DABA being 7/3, exhibited the optimum tensile strength and modulus of 1.96 and 108.3 GPa, respectively, attributed to the well‐defined ordered and dense structure. The chemical structure and molecular packing significantly affected the thermal stability of fibers, resulting in the different glass transition temperatures (Tg) from 350 to 380 °C. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 183–191

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Structure and properties of novel PMDA/ODA/PABZ polyimide fibers

Cited by 44 publications

References 30 publications

High‐performance copoly(benzimidazole‐benzoxazole‐imide) fibers: Fabrication, structure, and properties

High‐performance copoly(benzimidazole‐benzoxazole‐imide) fibers: Fabrication, structure, and properties

Preparation and characterization of novel polyimide films containing amide groups

Structure and properties of polyimide fibers containing benzimidazole and Amide Units

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