A thermo-rheological study on the structure property relationships in the reinforcement of nylon 6–POSS blends

Andrade, Ricardo; Huang, Rongzhi; Herbert, Matthew; Chiaretti, Daniel; Ishida, Hatsuo; Schiraldi, David A.; Maia, João M.

doi:10.1016/j.polymer.2013.12.003

Cited by 13 publications

(17 citation statements)

References 20 publications

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“…5 for nylon 6 and nylon 6/POSS. Only a very small, if any, influence of processing conditions on blends can be detected, consistent with the literature [25], where at this concentration only very small variations were observed from the nylon 6. It is nonetheless important to show that the same rheological behavior is kept for all samples.…”

Section: Extruded Blendssupporting

confidence: 92%

“…From our previous work [23], it is known that this grade of POSS contains two distinct endothermic transitions upon heating, one at 50 C and other at approximately 270 C. It is also known that the POSS remains a solid after the first transition and becomes a liquid after the second transition. It was shown for POSS concentrations above 1% in the polymer, a residual peak that increases with the POSS concentration around 267 C can be observed [25]; this peak appears to be the second endothermic transition of POSS, but is not observed in the present work, suggesting that POSS molecules are dispersed and in an amorphous state. Rheological experiments were conducted in order to analyze the blends' viscoelastic properties at different temperatures.…”

Section: Extruded Blendscontrasting

confidence: 52%

“…7; the data suggests that the state of dispersion is good enough in all samples that they do not show significant differences in tensile properties. This is not surprising, since the processing conditions (defined based on the knowledge gained from our previous works [23,25]) were set from the beginning to achieve good POSS dispersion upon extrusion. The mechanical properties only confirm that was indeed achieved.…”

Section: Extruded Blendsmentioning

confidence: 98%

“…6, demonstrating that there is a small decrease in the modulus for some of the samples, due to the good dispersion of the POSS [25], indicating that there is only a small variation in POSS dispersions across the samples. It is important to note how sensitive tan d is to the onset of the POSS melting point (second endothermic transition) around 267 C, which it was not able to be detected by the DSC measurements during the present work.…”

Section: Extruded Blendsmentioning

confidence: 99%

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Optimization of melt blending process of nylon 6‐POSS: Improving mechanical properties of spun fibers

Andrade

Weinrich

Ferreira

et al. 2015

Polymer Engineering & Sci

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Blends of nylon 6 and a silsesquioxane additive, aminopropyl isobutyl POSS containing 2.5% POSS by weight, were melt‐compounded with different process conditions in order to test a previously proposed mechanism for reinforcement of PA6 by POSS. In this work, we proposed that above the POSS melting temperature of 267°C POSS becomes partially soluble in the nylon 6 matrix, leading to smaller domains upon cooling, and the remaining nondiffused POSS agglomerates need to have an acceptable size distribution, typically 16 µm2 or less in area. In this work, we test this hypothesis by producing blends with POSS existing as phase‐separated aggregates of even smaller size than before and processing them under various thermomechanical conditions. Although there were no significant differences in the morphology and mechanical properties between the different extruded samples, the results from the spun fibers present significant improvements in tensile properties relative to previous reports. Our results suggest that in order to maximize the tensile strength of melt spun fibers, the extruded blends should be processed at temperatures above the POSS melting temperature and at intermediate shear rates, since these conditions lead to lower debonding between POSS particles and the matrix, and smaller average particle size. POLYM. ENG. SCI., 55:1580–1588, 2015. © 2015 Society of Plastics Engineers

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Section: Extruded Blendssupporting

confidence: 92%

Section: Extruded Blendscontrasting

confidence: 52%

Section: Extruded Blendsmentioning

confidence: 98%

Section: Extruded Blendsmentioning

confidence: 99%

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Optimization of melt blending process of nylon 6‐POSS: Improving mechanical properties of spun fibers

Andrade

Weinrich

Ferreira

et al. 2015

Polymer Engineering & Sci

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“…Andrade [26] blends nylon 6 and APOSS which contained 0-5% POSS by weight. APOSS was previously demonstrated to be an ineffectual additive at concentrations of more than approximately 3% by weight, lacking solubility and favorable interactions with the polymer matrix.…”

Section: Blendingmentioning

confidence: 99%

Advances on Manufacturing of POSS Reinforced Resin Matrix Composites

Wang¹,

Liu²,

Chen³

et al. 2014

Proceedings of the 2015 International Conference on Material Science and Applications

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Abstract. POSS with cage-like hybrid molecules composed of silicon and oxygen has raised great interests of materials researchers owing to its excellent mechanical and thermal properties, such as tensile strength, tensile modulus and glass transition temperature Tg. And it has been widely used in electronics, automotives and multiple applications. The four basic manufacturing advances on POSS reinforced resin matrix composites were revealed in this paper and the corresponding conclusions were given. The advances concluded that POSS as reinforced phase could to some extent improve the mechanical and thermal properties of nanocomposites.

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