Estudio de poliamidas en configuración estrella para su uso como matriz en composites termoplásticos con alta capacidad de integración
- Karina Núñez
- Manuel Herrero 1
- María Asensio 2
- Julia Guerrero 2
- Juan Carlos Merino
- José María Pastor
- 1 Universidad de Valladolid. España
- 2 Parque Tecnológico de Boecillo. Valladolid
ISSN: 0034-8708
Año de publicación: 2022
Título del ejemplar: Materiales compuestos
Volumen: 123
Número: 777
Tipo: Artículo
Otras publicaciones en: Revista de plásticos modernos: Ciencia y tecnología de polímeros
Resumen
This work demonstrates the successful use of reactive extrusion to prepare star branched polyamides (sPA6). The star configuration allows obtaining a thermoplastic matrix based on polyamide (PA6) with low viscosity and high polarity that improves the interaction with fibres and offers improved mechanical properties over traditional thermoplastic composites. To obtain the branching, the effect of the amount of 5-aminophthalic acid, used as a linking agent (LA), was evaluated in order to observe the influence on the structural, thermal, rheological and mechanical behaviour of the final 3-arm star polyamides. The results showed that an increase of LA content in the final structures resulted in a strong decrease of melt viscosity, toughness and impact strength, as well as an improvement of stiffness. Thermoplastic composites made with sPA6 matrix show improved processability, compared to those made with PA6, without losing mechanical properties. In addition, their use as an energy director in the welding process also showed an improvement in their ultrasonic weldability. Therefore, the sPA6s are particularly interesting as thermoplastics for fabric impregnation applications