2007
DOI: 10.1002/polb.21117
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Double yielding in PA6: Effect of mold temperature and moisture content

Abstract: In this study we have investigated the effect of mold temperature and moisture content on double yielding of virgin polyamide 6 (PA6) uniaxially deformed at room temperature. The experimental results have revealed that, to a certain extent, a limited increment in both mold temperature and moisture content will make the second yield process become more apparent. However, the double yielding behavior will disappear totally in the case of much higher mold temperature and moisture content. Instead, a typical singl… Show more

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Cited by 9 publications
(4 citation statements)
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“…After that, it was followed by a second yielding, including the second hardening stage and the second cold‐draw stage (or third yielding), until the samples fractured during the third hardening finally. Similar phenomenon has been observed in other polymers, such as PE, PA6, and PA12 . In our study, the mechanism of this interesting phenomenon might be related with the microphase structure of copolymers and the chain alignment during the tension process.…”
Section: Resultssupporting
confidence: 88%
“…After that, it was followed by a second yielding, including the second hardening stage and the second cold‐draw stage (or third yielding), until the samples fractured during the third hardening finally. Similar phenomenon has been observed in other polymers, such as PE, PA6, and PA12 . In our study, the mechanism of this interesting phenomenon might be related with the microphase structure of copolymers and the chain alignment during the tension process.…”
Section: Resultssupporting
confidence: 88%
“…All samples display different polyamide crystal phases and the dominant peaks at 2 θ = 21.4°, 20.2°, and 23.6° are respectively attributed to the γ, α 1 , and α 2 phases. The large band from 20° to 24° and centered at 22° was attributed to the amorphous phase as shown on Figure …”
Section: Resultsmentioning
confidence: 96%
“…The large band from 208 to 248 and centered at 228 was attributed to the amorphous phase as shown on Figure 16. [30][31][32][33][34] One can observe that depending on the plasma jet speed, a phase transition occurs in the material as observed by DSC and ATR-FTIR. To estimate this transition, the areas of the different peaks were obtained using a Gaussian method as described in previous studies.…”
Section: Surface Diagnosticsmentioning
confidence: 99%
“…Most studies of the double yielding behavior of polymers have been focused on polyethylene systems, [35][36][37][38][39][40][41] although this behavior was also observed in polyamide 6 systems. [42][43][44][45][46] However, to the best of our knowledge, no literature has been reported concerning this special phenomenon in polyurethanes. To interpret the double yielding behavior, Gaucher-Miri and Se ´gue ´la 36 proposed a so-called heterogeneous slip and homogeneous slip model.…”
Section: Resultsmentioning
confidence: 99%