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Thermal, dynamic mechanical, and creep behavior of carbon nanotube reinforced ASA/Na‐ionomer blend
Author(s) -
Datta Pulak,
Guha Chandan,
Sarkhel Gautam
Publication year - 2015
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3567
Subject(s) - materials science , nanotube , carbon nanotube , ionomer , differential scanning calorimetry , composite material , nanocomposite , thermogravimetric analysis , chemical engineering , polymer , thermal stability , polymer chemistry , copolymer , physics , engineering , thermodynamics
The present manuscript is aimed at the development of the protective layer for metal components for outdoor applications such as telecommunication components. Multiwalled carbon nanotubes at varying weight (from 0.5% to 5.0% by weight) were incorporated into newly developed 50/50 blend of acrylonitrile styrene acrylate (ASA) and ethylene acrylic acid‐based Na‐ionomer blend. ASA has inherent weather‐resistant property whereas Na‐ionomer has high affinity to adhere metal components. Nanocomposites were prepared by melt blending technique and were evaluated for thermal properties (thermogravimetric analysis and differential scanning calorimetry), dynamic mechanical analysis, and creep as well as recovery properties. Up to 1% nanotube content, there were predominant polymer/nanotube interactions; further addition resulted in nanotube networks formation that reduced polymer/nanotube interactions. These interactions increased both the thermal stability and storage modulus till 1% nanotube concentration, and after that, decreasing trend is observed. The creep deformation, as well as recovery, shows the opposite trend. In addition, the nanotube/nanotube sliding above 1% nanotube content increased the creep deformation further. The higher temperature played an altogether different role during recovery of the nanocomposite. The different polymer chain parts of the “brush” type ASA/Na‐ionomer blend interacted differently with carbon nanotubes; the ionic aggregates peak position of Na‐ionomer in differential scanning calorimetry thermogram was influenced by multiwalled carbon nanotubes, but the endotherm peak due to polyethylene crystallites of Na‐ionomer was unaffected. Carbon nanotubes also affected the glass transition temperature of polystyrene acrylonitrile matrix of ASA. Copyright © 2015 John Wiley & Sons, Ltd.