Axial tensile and compressive properties of high-performance polymeric fibres

Fawaz, Scott A.; Palazotto, Anthony N.; Wang, C.S.

doi:10.1016/0032-3861(92)90566-f

Cited by 30 publications

(23 citation statements)

References 11 publications

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“…This gauge length dependence has been previously observed [28,29] and attributed to other factors, such as misalignment for a material under axial compression, machine compliance and interfacing problems that may affect the apparent modulus in various degrees. The low apparent compressive moduli might be due to a synergistic effect of these factors.…”

Section: Discussionmentioning

confidence: 83%

“…As explained in reference [29], Eq. (7) predicts a linear dependence of the reciprocal apparent modulus on the reciprocal gauge length as,…”

Section: Discussionmentioning

confidence: 97%

“…One of the most important parameters is the ratio L 0 /D [25][26][27] where L 0 and D are, respectively, the initial sample length and diameter. The uniaxial compression test is valid if this ratio ranges between two limits [28,29], corresponding to an inhomogeneous stress distribution for the lower limit and to the buckling effect for the upper limit.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison between flexural and uniaxial compression tests to measure the elastic modulus of silica aerogel

Alaoui

Woignier

Scherer

et al. 2008

Journal of Non-Crystalline Solids

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Section: Discussionmentioning

confidence: 83%

“…As explained in reference [29], Eq. (7) predicts a linear dependence of the reciprocal apparent modulus on the reciprocal gauge length as,…”

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison between flexural and uniaxial compression tests to measure the elastic modulus of silica aerogel

Alaoui

Woignier

Scherer

et al. 2008

Journal of Non-Crystalline Solids

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“…Contrary to nonlinear behavior in tension, with increasing axial compressive stress the compressive modulus decreases, the socalled "modulus softening (or strain softening)" phenomenon. For PBZT fibers, the decrease of compressive modulus could be up to 20% in the bending beam test determined with Raman spectroscopy (213) and up to 8% in the microtensile testing machine (MTM) test (214)(215)(216). It has been observed that under compression, the fiber birefringence decreases, corresponding to a crystal/fibril disorientation away from the fiber axis (191,(208)(209)(210)(211)(212)217,218).…”

Section: Compressive Properties As Listed Inmentioning

confidence: 99%

Rigid‐Rod Polymers

Wang¹,

Jiang²,

Adams³

2011

Encyclopedia of Polymer Science and Technology

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Pursuing high strength and high modulus polymer fibers and novel electrooptical properties have motivated much research activity in rigid‐rod polymers in the past 40 years. In this review, we examine the synthesis, structures, and properties of rigid‐rod polymers with emphasis on polybenzobisoxazoles (PBO), polybenzobisthiazoles (PBZT) and polybenzimidazoles (PBI), beginning with their solution properties, especially lyotropic liquid crystallinity. High performance fibers spun from lyotropic liquid crystalline polyphosphoric acid (PPA) solution are described. The characterization of fiber properties including mechanical, thermal, electrical, and optical properties is summarized. PBO (Zylon) and PIPD (M5) fibers were successfully commercialized in high strength applications such as body armor, ropes, cables, and recreational equipment in the last 10 years, and we discuss the possible causes of rapid degradation of some PBO fibers. The concepts of molecular composites and nanocomposites provide new applications in antiballistic materials, fire protection, athletic equipment, cables, strings, ropes, cordage, sails, multilayer circuits, and catalyst supports. Recently, rigid‐rod polymer films have drawn attention in the electrooptical fields, especially for phosphoric acid (PA)‐doped PBI membranes (Celtec MEAs) in the applications of high temperature fuel cells. Computer simulation has been employed as a powerful tool to predict the properties of the rigid‐rod polymers.

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“…Since PBO provides superior chemical resistance, tensile strength and modulus, cut and abrasion resistance, and thermal stability, it has been considered as an optimum material for high performance applications such as lightweight bulletproof vests, helmets, fire-resistance suits, etc. Accordingly, researches on synthesis [1,[3][4][5][6], spinning [3], structures [7][8][9][10][11][12][13][14][15][16], and properties [3,7,10,13,[17][18][19] of PBO have been carried out extensively.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Fibers Based on Poly(p-Phenylene Benzobisoxazole)s Containing Trifunctional Moiety as Chain Extender

Jeong¹,

Lee²,

Min³

et al. 2013

Textile Science and Engineering

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A series of poly(p-phenylene benzobisoxazole) (PBO)-based copolymers containing a trifunctional moiety in their backbones were prepared via polymerization of 4,6-diaminoresorcinol dihydrochloride (DAR) with terephthaloyl chloride (TPC) and 1,3,5-benzenetricarbonyl trichloride (BTC) in poly(phosphoric acid) (PPA). The concentration of trifunctional BTC comonomer was controlled during polymerization to be 0.0-2.0 mol% of difunctional TPC concentration. The inherent viscosity and associated average molecular weight of PBO copolymers with different BTC contents were evaluated by using solution viscometry and the Mark-Houwink equation, respectively. In addition, single fibers based on neat PBO and its copolymers were prepared by in situ dry-jet wet spinning of anisotropic liquid crystalline polymerization products in PPA dopes. The molecular structure and morphology of the as-spun fibers were determined. The effects of BTC content on the thermal stability and tensile mechanical properties of the as-spun fibers were also investigated.

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Axial tensile and compressive properties of high-performance polymeric fibres

Cited by 30 publications

References 11 publications

Comparison between flexural and uniaxial compression tests to measure the elastic modulus of silica aerogel

Comparison between flexural and uniaxial compression tests to measure the elastic modulus of silica aerogel

Rigid‐Rod Polymers

Preparation and Characterization of Fibers Based on Poly(p-Phenylene Benzobisoxazole)s Containing Trifunctional Moiety as Chain Extender

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