Microstructure evolution in polyamide PA11 under small uniaxial extension

Jolly, L.; Tidu, Aurélien; Heizmann, J.J.; Bolle, Bernard

doi:10.1016/s0032-3861(02)00486-x

Cited by 33 publications

(16 citation statements)

References 25 publications

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“…The introduction of TTNT into the PA11 matrix improves its thermal properties, influencing the furthermost glass transition and the decomposition temperature. Having in mind that T g detection from DSC thermograms was not possible for neat PA11 and composites with a low content of TTNT, the literature value of 40°C for neat PA11 was used for comparison [26]. The presence of the nanofiller caused the rise of T g in the composites for about 10-30%, reaching the highest value of 53°C in the PA-NT/L-2% specimen.…”

Section: Thermal and Mechanical Properties Of Compositesmentioning

confidence: 99%

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

et al. 2015

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Section: Thermal and Mechanical Properties Of Compositesmentioning

confidence: 99%

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

et al. 2015

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“…The internal polymeric layer has the function of sealing the line, preventing the direct contact between fluid and the steel layer. The polyamide 11 or PA‐11 is the main polymer used in the manufacture of flexible pipes, because of its good thermomechanical properties, suitable for manufacturing flexible pipe from extrusion processing …”

Section: Introductionmentioning

confidence: 99%

Monitoring the polyamide 11 degradation by thermal properties and X‐ray fluorescence spectrometry allied to chemometric methods

et al. 2012

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The influence of temperature (110 and 120 °C) on the ageing of piping made from polyamide 11 (PA‐11) containing 10–12% of plasticizer was studied using deionized water (pH ≈ 7.0). A clean analytical methodology has been employed for quality control of polymeric materials: energy‐dispersive X‐ray fluorescence spectrometry (ED‐XRF). It provides a fast and suitable technique to characterize chemical elements because of its multielemental capability, good sensitivity, high precision, short analytical time, and nondestructive nature. Herein, the content of additive in PA‐11 was monitored from ED‐XRF measurements where the abundance of the S line is directly related to the ageing time, agreeing with the thermogravimetric analysis. The XRF data were allied to chemometric treatment to classify PA‐11 samples according to the amount of additive and weight average molar mass change, predicting the ageing time, and viscosity values of PA‐11. Therefore, the XRF can be used as a clean analytical methodology to monitor the PA‐11 degradation, thus eliminating the use of toxic organic solvents (necessary to viscosity measurements) and reducing the working time. Also, the effect of hydrolysis on the structure over time and the material morphology were monitored through measurements of dynamic mechanical analysis and differential scanning calorimetry. Copyright © 2012 John Wiley & Sons, Ltd.

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“…In these diffractograms, PEEK presents four main crystalline peaks at 2θ = 18.7°, 20.8°, 22.5° and 28.7°, which, according to Nguyen and Ishida 11 and Lai et al 37 correspond to the crystalline planes (110), (111), (200) and (211) of an orthorhombic unit cell. The PA-11 diffractogram presents major peaks at 2θ = 7.3°, 19.9° and 23.0°, characteristic of the (001), (100) and (010, 110) planes, respectively, of a triclinic unit cell, as proposed by Chaupart and Serpe 23 , Jolly et al 38 and Zhang et al 39 . Table 1 shows the PEEK and PA-11 degrees of crystallinity for the unaged polymers, the polymers aged for 1 and 3 months in anhydrous and hydrated ethanol at 60 and 23 °C, and the polymers aged in hot-air (60 °C).…”

Section: Crystallinitymentioning

confidence: 69%

Structural and Thermo-mechanical Evaluation of Two Engineering Thermoplastic Polymers in Contact with Ethanol Fuel from Sugarcane

Silva

Berry²,

Costa

2016

Mat. Res.

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Special polymers have been used in the manufacture of storage structures and pipelines avoiding corrosive processes during ethanol fuel transport/storage. Therefore, this work investigated comparatively the effects of the ethanol on the physical-mechanical properties of poly (ether ether ketone) (PEEK) and polyamide 11 (PA-11) based on ageing tests. The WAXD and DSC results demonstrated slight reductions on the crystallinity degree of the aged PEEK, contrariwise to what happened with PA-11, where X c increased after ageing. However, the results of thermal, thermomechanical and mechanical analysis (TGA, DMTA, tensile and micro-IITs) demonstrated that PEEK is stable and no significant changes were observed in its elastic modulus (E y ≈ 3.4 GPa, E' and E it ≈ 3.7 GPa) or glass transition temperature. PA-11, conversely, was sensitive to ethanol fuel and expressive changes of its physicalmechanical properties were verified. For both materials, a reasonable correlation between crystallinity and mechanical properties was established.

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Microstructure evolution in polyamide PA11 under small uniaxial extension

Cited by 33 publications

References 25 publications

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

Monitoring the polyamide 11 degradation by thermal properties and X‐ray fluorescence spectrometry allied to chemometric methods

Structural and Thermo-mechanical Evaluation of Two Engineering Thermoplastic Polymers in Contact with Ethanol Fuel from Sugarcane

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