Influence of non-covalent modification of multiwalled carbon nanotubes on the crystallization behaviour of binary blends of polypropylene and polyamide 6

2015 ◽  
Vol 17 (6) ◽  
pp. 4293-4310 ◽  
Author(s):  
Nabaneeta Mukhopadhyay ◽  
Ajay S. Panwar ◽  
Gulshan Kumar ◽  
I. Samajdar ◽  
Arup R. Bhattacharyya
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Polyamide 6 ◽  
Covalent Modification ◽  
Polymer Chains ◽  
Crystallization Behaviour ◽  
Multiwalled Carbon ◽  
Binary Blends

‘Agglomerated’ and ‘individualized’ MWNTs providing varying extent of hetero-nucleation to the polymer chains.

scholarly journals Miniemulsion copolymerization of (meth)acrylates in the presence of functionalized multiwalled carbon nanotubes for reinforced coating applications

2017 ◽  
Vol 8 ◽  
pp. 1328-1337 ◽  
Author(s):  
Bertha T Pérez-Martínez ◽  
Lorena Farías-Cepeda ◽  
Víctor M Ovando-Medina ◽  
José M Asua ◽  
Lucero Rosales-Marines ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Miniemulsion Polymerization ◽  
Polymer Chains ◽  
Multiwalled Carbon ◽  
Neat Polymer ◽  
In Situ Composites ◽  
3D Network ◽  
Insoluble Polymer

Film forming, stable hybrid latexes made of methyl metacrylate (MMA), butyl acrylate (BA) and 2-hydroxyethyl methacrylate (HEMA) copolymer reinforced with modified multiwalled carbon nanotubes (MWCNTs) were synthesized by in situ miniemulsion polymerization. The MWCNTs were pretreated by an air sonication process and stabilized by polyvinylpyrrolidone. The presence of the MWCNTs had no significant effect on the polymerization kinetics, but strongly affected the polymer characteristics (T g and insoluble polymer fraction). The performance of the in situ composites was compared with that of the neat polymer dispersion as well as with those of the polymer/MWCNT physical blends. The in situ composites showed the presence of an additional phase likely due to the strong interaction between the polymer and MWNCTs (including grafting) that reduced the mobility of the polymer chains. As a result, a substantial increase of both the storage and the loss moduli was achieved. At 60 °C, which is above the main transition region of the polymer, the in situ composites maintained the reinforcement, whereas the blends behaved as a liquid-like material. This suggests the formation of a 3D network, in good agreement with the high content of insoluble polymer in the in situ composites.

Complementary effects of multiwalled carbon nanotubes and conductive carbon black on polyamide 6

2010 ◽  
Vol 48 (11) ◽  
pp. 1203-1212 ◽  
Author(s):  
Henry Kuo Feng Cheng ◽  
Nanda Gopal Sahoo ◽  
Yongzheng Pan ◽  
Lin Li ◽  
Siew Hwa Chan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Black ◽  
Multiwalled Carbon Nanotubes ◽  
Polyamide 6 ◽  
Multiwalled Carbon ◽  
Conductive Carbon Black
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