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Influence of hybrid nano-filler on the crystallization behaviour and interfacial interaction in polyamide 6 based hybrid nano-composites

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Title Influence of hybrid nano-filler on the crystallization behaviour and interfacial interaction in polyamide 6 based hybrid nano-composites
 
Creator SREEKANTH, MS
PANWAR, AS
POTSCHKE, P
BHATTACHARYYA, AR
 
Subject MULTIWALL CARBON NANOTUBES
ACRYLONITRILE-BUTADIENE-STYRENE
CO-CONTINUOUS BLENDS
MECHANICAL-PROPERTIES
RAMAN-SPECTROSCOPY
GRAPHENE
GRAPHITE
DISPERSION
NANOCOMPOSITES
CONDUCTIVITY
 
Description Expanded graphite (EG) and multiwalled carbon nanotubes (MWNTs) based hybrid nano-composites were prepared with polyamide 6 (PA6) matrix via melt-mixing technique using a conical twin-screw micro-compounder. A novel organic modifier (lithium salt of 6-aminohexanoic acid; Li-AHA) was employed to modify MWNTs, which was utilized to intercalate Li-AHA modified MWNTs into the partially exfoliated EG gallery. Morphological investigation showed the intercalation of Li-AHA modified MWNTs into a partially exfoliated EG gallery in an EG/MWNTs-m2h hybrid, whereas the unmodified EG/MWNTs-h hybrid mixture exhibited a separate identity in the mixture. Improved interaction via melt-interfacial reaction between the acid end group of PA6 and the amine functionality of Li-AHA in the EG/MWNTs-m2h hybrid filler was confirmed by Fourier transform infrared spectroscopic analysis. The extent of melt-interfacial reaction was increased as a function of Li-AHA concentration in the filler. Wide angle X-ray diffraction analysis showed the existence of the alpha-crystalline phase of PA6. The incorporation of MWNTs, EG and EG/MWNTs hybrid in the PA6 matrix has favoured an alpha-crystalline structure of the PA6 phase. Crystallization studies have indicated a significant increase in the bulk crystallization temperature of the PA6 phase in the presence of MWNTs, EG and the EG/MWNTs hybrid filler. Moreover, the formation of PA6 'trans-crystalline lamellae' on the MWNTs surface was facilitated in the case of composites with MWNTs and the EG/MWNTs hybrid filler. An attempt has been made to investigate the role of the EG/MWNTs hybrid filler in influencing the crystallization behaviour of the PA6 phase in the hybrid nano-composites.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2016-01-15T07:03:16Z
2016-01-15T07:03:16Z
2015
 
Type Article
 
Identifier PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 17(14)9410-9419
1463-9076
1463-9084
http://dx.doi.org/10.1039/c5cp00018a
http://dspace.library.iitb.ac.in/jspui/handle/100/18001
 
Language en