Morphology, deformation and failure behaviour of homo- and copolyimide fibres

Sukhanova, T. E.; Baklagina, Yu. G.; Kudryavtsev, V. V.; Maricheva, T. A.; Lednický, F.

doi:10.1016/s0032-3861(99)00039-7

Cited by 42 publications

(29 citation statements)

References 13 publications

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“…Meanwhile, the co-polyimide fibers can have a higher tensile strength than homo-polyimide. In our work, the BPO co-polyimide fibers possess an excellent balance of tensile strength and Young's modulus with their tensile strength being much higher than that of homo-polyimide nanofibers [24]. Interestingly, the copolyimide nanofibers reported in this work also exhibit moderate strain-at-break, which in combination with high strength and stiffness, results in a good levels of toughness.…”

Section: Mechanical Properties Of Co-polyimide Nanofibersmentioning

confidence: 57%

High-performance electrospun co-polyimide nanofibers

Pantano

Pugno

Bastiaansen

et al. 2015

Polymer

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Abstract. Co-polyimide nanofiber based on BPDA (3, 30, 4, 40-Biphenyltetracarboxylic dianhydride)/PDA (p-Phenylene-diamine)/ODA (4, 40-Oxydianiline) (BPO) were produced by electrospinning followed by imidization from precursor polyamic acid (PAA) nanofiber. The aligned co-polyimide nanofiber mats possessed a modulus, strength and strain-at-break of respective 10 GPa, 1.04 GPa, and 13.5%. In comparison with previously reported co-polyimide nanofibers BPDA/BPA/ODA (BBO) with similar chemical structures, these BPO co-polyimide nanofibers can be as stiff and strong while at the same time exhibiting moderate ductility. On the other hand, the current BPO co-polyimide nanofibers exhibited a greater toughness than previously reported homo-polyimide (BPDA/PDA) nanofibers due to their relatively high strain-at-break, leading to similar levels of toughness as Kevlar fibers. A novel and efficient way to evaluate mechanical properties of aligned nanofiber bundles (~30 nanofibers in a bundle) by virtue of a micro-tensile tester was also reported. Young's modulus of 38 ± 2 GPa and tensile strength of 1550 ± 70 MPa were found for nanofiber bundles and were significantly higher than those of aligned mats, and are among the highest reported for electrospun fibers. Further evaluation of this bundle data using Daniel's theory based on Weibull statistics resulted in a predicted tensile strength of single copolyimide nanofibers of about 1.9 GPa.

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Section: Mechanical Properties Of Co-polyimide Nanofibersmentioning

confidence: 57%

High-performance electrospun co-polyimide nanofibers

Pantano

Pugno

Bastiaansen

et al. 2015

Polymer

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“…12 Russian scientists have reported as-spun polyimide bers with an ultra-high ultimate tensile strength of 2.9-3.3 GPa, which is the highest tensile strength of PI bers reported to date. 13,14 Their studies revealed that the bers made from co-PI had a considerably higher tensile strength than those made from the corresponding homo-PI.…”

Section: Introductionmentioning

confidence: 99%

Highly strong and highly tough electrospun polyimide/polyimide composite nanofibers from binary blend of polyamic acids

Han

Chen

et al. 2014

RSC Adv.

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Electrospun blend-polyimide (blend-PI) nanofibers with high tensile strength and toughness are highlighted in this article. The blend-PI nanofibers were prepared by electrospinning the binary blend of rigid and flexible polyamic acids, followed by thermal imidization. The method is simple and can be extended to other kinds of polyamic acids. The morphologies and structures of the blend-PI nanofibers were investigated by scanning electron microscopy (SEM) and wide-angle X-ray diffraction (XRD). The mechanical properties, thermal properties and miscibility of the blend-PI nanofibers were studied by a tensile test, thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The mechanical properties of the blend-PI nanofibers, including tensile strength, modulus, elongation at break and toughness, could be well-tuned by modifying the molar ratio of the rigid component (B-PI) and the flexible component (O-PI). The blend-PI nanofibers with B-PI/O-PI molar ratio of 4/6 had an ultra-high strength of 1.3 GPa with an excellent toughness of 82 J g À1 . All the blend-PI nanofibers showed thermal stability to above 500 C. The presence of only one glass transition temperature (T g ) suggested the good miscibility of the binary PIs in the blend-PI nanofibers. This study would provide completely new opportunities for modifying the properties of electrospun PI nanofibers.

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“…HSHMPI fibers show skin‐core morphologies with flake‐like and fibrillated structures along the fiber direction. The skin appears to be composed of fibrils and presents a serious deformation due to the splitting during the transversal fracture, reflecting the high molecular orientation along the fiber axis and good toughness . The observed splitting morphologies paralleled to the fiber longitudinal axis demonstrate that the longitudinal strength of HSHMPI fibers is higher than the lateral strength.…”

Section: Structures and Properties Of Hshmpi Fibersmentioning

confidence: 97%

Polyimide Fibers with High Strength and High Modulus: Preparation, Structures, Properties, and Applications

Zhang

Niu

2018

Macromol. Rapid Commun.

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High strength and high modulus polyimide (HSHMPI) fibers are a type of novel high-performance organic fiber with an initial modulus higher than 90 GPa and extremely high tensile strength over 2.5 GPa realizing broad applications in the fields of electronic, engineering, aerospace, and atomic energy industries. There are currently two synthetic pathways, i.e., one-step and two-step methods, developed for the manufacture of HSHMPI fibers. An integrated fabrication process involving wet-spinning followed by thermal imidization is accepted as a typical two-step synthetic route for industrialization of HSHMPI fibers. In this article, the classification, synthetic method and technology, molecular structure, morphology, microstructures, and properties of HSHMPI fibers are summarized extensively. The effects of molecular structure and synthetic technology on the microstructures and overall performance of HSHMPI fibers are discussed. In addition, the trend in development and the application prospect of HSHMPI fibers are analyzed accordingly.

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Morphology, deformation and failure behaviour of homo- and copolyimide fibres

Cited by 42 publications

References 13 publications

High-performance electrospun co-polyimide nanofibers

High-performance electrospun co-polyimide nanofibers

Highly strong and highly tough electrospun polyimide/polyimide composite nanofibers from binary blend of polyamic acids

Polyimide Fibers with High Strength and High Modulus: Preparation, Structures, Properties, and Applications

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