Calle et al 2019a - Revision history

Materiales.Compuestos at 15:47, 24 October 2022

2022-10-24T15:47:31Z

Materiales.Compuestos at 15:46, 24 October 2022

2022-10-24T15:46:43Z

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Scipediacontent at 10:40, 7 May 2022

2022-05-07T10:40:00Z

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Scipediacontent: Scipediacontent moved page Draft Content 785898844 to Calle et al 2019a

2022-03-31T18:50:49Z

Scipediacontent moved page Draft Content 785898844 to Calle et al 2019a

Scipediacontent: Created page with "== Abstract == Under the NANOTEK+ project, POLIFLUOR and TECNALIA propose to develop and scale industrially a polyamide obtained by direct synthesis. These properties, mainly..."

2022-03-31T18:50:46Z

Created page with "== Abstract == Under the NANOTEK+ project, POLIFLUOR and TECNALIA propose to develop and scale industrially a polyamide obtained by direct synthesis. These properties, mainly..."

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== Abstract ==

Under the NANOTEK+ project, POLIFLUOR and TECNALIA propose to develop and scale industrially a polyamide obtained by direct synthesis. These properties, mainly thermal ones, have to be improved by the addition of nanoparticles. To this end, it has been worked in the  dispersión of the nanoparticles and the process of polymerization, and in the industrial production process and its evaluation from the point of view of the health security. In-situ polymerization process of anionic polyamide 6 offers important advantages for the incorporation of nanoparticles because the low viscosity of the monomer make easier the dispersion of the nanoscale reinforcemenet. Several parameters of the process  have to be taken into account during the up scaling:

Selection of the suitable nanoparticles and their percentage, taking into account the dispersion ability in the matrix and their chemical compatibility.
Percentage of catalytic system, which can be affected by the nature of the nanoparticles.
Melting, feeding and polymerization temperatures, which should not degrade the nanoparticle.
Mixing rates, since the dispersion of the nanoparticles by mechanical stirring can produce air inside the obtaindes polymer.

The distribution of the nanomaterial in the polymer matrix and the adhesion degree between both, have studied under formulated material, using techniques such as SEM/EDS. The correct distribution of the nanoparticles in the polyamide 6 has been observed thoughout the industrialization.

== Full document ==
<pdf>Media:Draft_Content_785898844native-articles-209.pdf</pdf>

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 <div class="center" style="width: auto; margin-left: auto; margin-right: auto;">[[File:Calle_et_al_2019a-image6.png|centre|600x600px]]<span style="text-align: center; font-size: 75%;">'''Figura 2. '''Campaña de fabricación de materiales.''' '''</span></div>
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 Al observar la tabla 1 se pueden definir diversas cosas:
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 Por lo tanto se ha diseñado una segunda campaña de ensayos teniendo en cuenta las conclusiones arriba mostradas. Debido a que el tamaño de probeta empleado hasta ahora no permite extraer ningún resultado concluyente, se ha recurrido a un nuevo tamaño, mayor y estandarizado. En la tabla 2 se observa que en este caso sólo se ha recurrido a ensayos de tracción y dureza ya que las piezas están bien dispersas. Estos ensayos se han realizado tanto en condiciones de humedad (2%) como secas, para ver si el efecto negativo que tiene la humedad en la PA 6 se mejora con la adición de NP.
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 A la vista de los resultados que se observan en la tabla 2, se puede decir que las condiciones óptimas de fabricación son con él % de sistema catalítico bajo y el 2%NP. Este % de NP se ha elegido debido a que la diferencia  entre el 1 y el 3% es mínima y el gasto que supone un aumento del % de NP es importante. Por eso se elige un %NP intermedio. También se aprecia como la humedad sigue afectando negativamente a la PA 6, no consiguiendo ese deseado efecto barrera.

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