The effects of nanoclay and carbon nanotube co‐addition on properties of an amorphous polyamide/maleated styrene‐ethylene‐co‐butylene‐styrene blend

This work studied the individual and combined addition of natural (MMT‐Na) and modified (MMT‐30B) nanoclays, and carbon nanotubes (CNTs) to a poly (hexamethylene isophthalamide co‐terephthalamide) (aPA)/styrene‐ethylene/butylene‐styrene (SEBS) blend grafted with maleic anhydride. Their effects on th...

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Bibliographic Details
Published in:Polymer engineering and science 2022-06, Vol.62 (6), p.2008-2018
Main Authors: Damman, Suzana, Steffen, Teresa Tromm, Becker, Daniela
Format: Article
Language:English
Subjects:
carbon Nanotube
Carbon nanotubes
clay
Composition
Dynamic mechanical analysis
dynamic‐mechanical properties
Ethylene
Flammability
Maleic anhydride
Mechanical properties
Morphology
Nanocomposites
Nanoparticles
Nanotubes
polyamide
Polyamide resins
Polyamides
Polymers
Properties
SEBS
Storage modulus
Structure
Styrenes
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Summary:This work studied the individual and combined addition of natural (MMT‐Na) and modified (MMT‐30B) nanoclays, and carbon nanotubes (CNTs) to a poly (hexamethylene isophthalamide co‐terephthalamide) (aPA)/styrene‐ethylene/butylene‐styrene (SEBS) blend grafted with maleic anhydride. Their effects on the blend's morphology, thermo‐mechanical properties, and flammability were evaluated. Morphological analysis showed that both clays were located in the aPA matrix, with the MMT‐Na as agglomerates and the MMT‐30B intercalated with exfoliated regions. The CNTs were dispersed and randomly oriented in the aPA matrix. Data obtained through dynamic‐mechanical analysis (DMA) showed that adding 1.0% MMT‐30B and 1.0% CNT increased the storage modulus (E') by 26% and 27%, respectively, while adding both 0.5% MMT‐30B and 0.5% CNT increased E' by 38%, suggesting synergy between the nanoparticles related to mechanical properties. Regarding flammability, since the first burn timing (t1) could not be obtained, none of the samples could be classified according to the UL94 standard. However, qualitatively, a better flammability performance was noticed for the nanocomposites than for the pure blend. Storage modulus and dripping behavior at burning. It shows synergy for the quaternary nanocomposite.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.25984