On the small-angle X-ray scattering of rigid-rod polymer fibres

Kumar, Satish; Warner, Steven B.; Grubb, D. T.; Adams, W. Wade

doi:10.1016/s0032-3861(05)80003-5

Cited by 56 publications

(35 citation statements)

References 28 publications

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“…The compressive properties of the PPTA fibers have been studied in many literatures 15,90,[107][108][109][110][111][112][113] . Tensile tests of compressively kinked poly(p-phenylene terephthalamide) (PPTA) fibers reveal only a 10% loss in tensile strength after application of compressive strains much greater than the critical strain required for kink band initiation 114 .…”

Section: Compressive Propertiesmentioning

confidence: 99%

Microstructural developments of poly (p-phenylene terephthalamide) fibers during heat treatment process: a review

et al. 2014

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Poly (p-phenylene terephthalamide) fibers prepared by wet or dry-jet wet spinning processes have a notable response to very brief heat treatment (seconds) under tension. The modulus of the as-spun fiber can be greatly affected by the heat treatment conditions (temperature, tension and duration). The crystallite orientation and the fiber modulus will increase by this short-term heating under tension. Poly (p-phenylene terephthalamide) fibers have a very high molecular orientation (orientation angle 12-20°). Kevlar  and Twaron  fibers are poly (p-phenylene terephthalamide) fibers. This review reports for PPTA fibers the heat treatment techniques, devices and its process conditions. It reports in details the structural relationships between the fiber properties which are influenced by the heat treatment process. In particular, focused deeply on the effect of the crystal structure and the morphology of the fibers on the mechanical properties of PPTA fibers.

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Section: Compressive Propertiesmentioning

confidence: 99%

Microstructural developments of poly (p-phenylene terephthalamide) fibers during heat treatment process: a review

et al. 2014

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“…The central equatorial streak in the SAXS patterns arises from the envelope of the nanofibrils and from other needleshaped entities like voids [37,38] . 17.3 Table 2 presents essential nanostructure parameters for the undeformed materials that have been extracted from the strong long-period peak in the CDF.…”

Section: Nanostructure Of Undeformed Materialsmentioning

confidence: 99%

Nanostructure Evolution Mechanisms During Slow Load‐Cycling of Oriented HDPE/PA Microfibrillar Blends as a Function of Composition

Zeinolebadi

Stribeck

Sari

et al. 2012

Macro Materials & Eng

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Oriented precursors of MFCs consisting of HDPE and PA6 or PA12 are studied during strain‐controlled slow load‐cycling. In the PA6‐containing blends a strongly retarded nanostrain response is detected. Compatibilization induces nanostrain heterogenization. Stress fatigue is lower in the PA12 blends, but hardly decreased by the compatibilizer. Selective migration of the compatibilizer into a disordered semi‐crystalline fraction of the HDPE matrix can explain the findings. The semi‐crystalline HDPE entities in PA6 blends appear more disordered than in PA12‐blends. An analysis of the HDPE nanostructure evolution during cycling reveals epitaxial strain crystallization. Uncompatibilized PA6 blends cycled about high pre‐strain show plastic flow but nanoscopic shrinkage in the semi‐crystalline stacks. magnified image

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“…The measurement by a reflection method was done from 5 to 60 (twice the Bragg angle) with a step-scanning device at a step interval of 0.1 , each fixed time of 40 s. RESULTS AND DISCUSSION Figure 1 shows the volume fraction (vol %) of copper against a copper-plated PBO fiber as a function of immersing time in the plating bath. It is seen that the plating content tends to level off drastically beyond 60 min, although the results are not shown in this paper.…”

Section: Methodsmentioning

confidence: 99%

High Modulus and High Strength Fibers with High Electric Conductivity Prepared by Copper Electroless Plating on the Surface of Poly(p-phenylenebenzobisoxazole) (PBO)

Matsuo

Ishikawa

Xiang

et al. 2007

Polym J

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ABSTRACT:In attempt to produce high modulus and high strength fibers with high electric conductivity, copper plating on the surface of poly(p-phenylenebenzobisoxazole) (PBO) fiber was carried out by using electroless plating, since PBO is a super-heat resistant polymer with the highest Young's modulus among polymers but is an insulator. The mechanical and electrical properties of the plated fibers were investigated as a function of copper content. At the maximum volume fraction of copper, ca. 30

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On the small-angle X-ray scattering of rigid-rod polymer fibres

Cited by 56 publications

References 28 publications

Microstructural developments of poly (p-phenylene terephthalamide) fibers during heat treatment process: a review

Microstructural developments of poly (p-phenylene terephthalamide) fibers during heat treatment process: a review

Nanostructure Evolution Mechanisms During Slow Load‐Cycling of Oriented HDPE/PA Microfibrillar Blends as a Function of Composition

High Modulus and High Strength Fibers with High Electric Conductivity Prepared by Copper Electroless Plating on the Surface of Poly(p-phenylenebenzobisoxazole) (PBO)

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