Effect of multiwall carbon nanotubes on thermomechanical and electrical properties of poly(trimethylene terephthalate)

Gupta, A. K.; Choudhary, Veena

doi:10.1002/app.34462

Cited by 21 publications

(7 citation statements)

References 33 publications

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“…The T m2 did not show much change upon incorporation of varying amounts of MWCNTs (Table I); however, DT showed a decrease thereby confirming that MWCNTs act as nucleating agent. Similar behavior has been reported for PTT 41,42 where DT is inversely proportional to MWCNTs loading.…”

Section: Dsc Analysissupporting

confidence: 85%

Polypropylene random copolymer/MWCNT nanocomposites: Isothermal crystallization kinetics, structural, and morphological interpretations

Verma

Choudhary

2014

J of Applied Polymer Sci

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This article describes the crystallization process of polypropylene random copolymer (PPCP) under isothermal conditions in presence of varying amounts of multiwalled carbon nanotubes (MWCNT) ranging from 0.5 to 4.0% w/w. Increase in the crystallization temperature under dynamic conditions confirmed the nucleating behavior of MWCNTs, which was also corroborated by crystallization studies under isothermal conditions. The crystallization kinetics was analyzed using Avrami equation and the parameters such as Avrami exponent, the equilibrium melting temperature and fold surface energy for the crystallization of PPCP chains in nanocomposites were obtained from the calorimetric data in order to determine the effect of MWCNTs on these parameters. Spherulitic growth of PPCP crystals was also investigated as a function of time and MWCNT content using hot stage polarizing microscope. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41734.

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Section: Dsc Analysissupporting

confidence: 85%

Polypropylene random copolymer/MWCNT nanocomposites: Isothermal crystallization kinetics, structural, and morphological interpretations

Verma

Choudhary

2014

J of Applied Polymer Sci

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“…Nucleating effect of rCF was further confirmed from the super cooling temperature DT (DT = T m2 -T c ), which was lower for all PTT/rCF composites .5°C) compared to neat PTT (45°C). Gupta et al observed that multiwall carbon nanotubes also lower the DT value of PTT and is an indication of higher nucleation rate [41]. Figure 12 shows the second heating scans for PTT and PTT/rCF composites.…”

Section: Modellingmentioning

confidence: 92%

“…The results showed that incorporation of recycled carbon fibre slightly decreased the percent crystallinity of PTT [41].…”

Section: Modellingmentioning

confidence: 93%

Novel biocomposites from poly(trimethylene terephthalate) and recycled carbon fibres

2012

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Biobased composites from recycled carbon fibre and poly(trimethylene terephthalate) (PTT) were fabricated by extrusion followed by injection moulding. The mechanical, thermal and morphological properties of the composites were investigated as a function of recycled carbon fibre content. The mechanical properties such as tensile, flexural and notched impact strength as well as tensile and flexural modulus of the composites increased with increasing recycled carbon fibre content. The improvement of stiffness and toughness of composite materials is one of the important findings of this investigation. Experimental values of tensile strength and modulus were compared with parallel, series and Hirsch's models. The morphology of the composites was analysed by scanning electron microscopy. Differential scanning calorimetry, thermogravimetric analysis and dynamic mechanical analysis were used to measure the thermal properties of the composites. Recycled carbon fibre loading appreciably improved the storage modulus of PTT. Thermal stability and crystallization temperature of PTT also improved with the recycled carbon fibre content.

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“…Thermogravimetric analysis of the foams demonstrated a decomposition retardancy that was induced by increasing the concentration of CNT (see the thermograms shown in Figure 4 and the results presented in Table 3 ). This could be attributed to the fact that the carbon nanotubes seemed to favor a better physical barrier in the prepared foams or a higher thermal conductivity, facilitating heat dissipation and, therefore, avoiding the accumulation of heat at a certain point [ 33 , 34 ]. Additionally, the combination of GnP and CNT resulted in a more complex decomposition behavior.…”

Section: Resultsmentioning

confidence: 99%

Effects of Carbon Nanotubes/Graphene Nanoplatelets Hybrid Systems on the Structure and Properties of Polyetherimide-Based Foams

2018

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Foams based on polyetherimide (PEI) with carbon nanotubes (CNT) and PEI with graphene nanoplatelets (GnP) combined with CNT were prepared by water vapor induced phase separation. Prior to foaming, variable amounts of only CNT (0.1–2.0 wt %) or a combination of GnP (0.0–2.0 wt %) and CNT (0.0–2.0 wt %) for a total amount of CNT-GnP of 2.0 wt %, were dispersed in a solvent using high power sonication, added to the PEI solution, and intensively mixed. While the addition of increasingly higher amounts of only CNT led to foams with more heterogeneous cellular structures, the incorporation of GnP resulted in foams with finer and more homogeneous cellular structures. GnP in combination with CNT effectively enhanced the thermal stability of foams by delaying thermal decomposition and mechanically-reinforced PEI. The addition of 1.0 wt % GnP in combination with 1.0 wt % CNT resulted in foams with extremely high electrical conductivity, which was related to the formation of an optimum conductive network by physical contact between GnP layers and CNT, enabling their use in electrostatic discharge (ESD) and electromagnetic interference (EMI) shielding applications. The experimental electrical conductivity values of foams containing only CNT fitted well to a percolative conduction model, with a percolation threshold of 0.06 vol % (0.1 wt %) CNT.

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Effect of multiwall carbon nanotubes on thermomechanical and electrical properties of poly(trimethylene terephthalate)

Cited by 21 publications

References 33 publications

Polypropylene random copolymer/MWCNT nanocomposites: Isothermal crystallization kinetics, structural, and morphological interpretations

Polypropylene random copolymer/MWCNT nanocomposites: Isothermal crystallization kinetics, structural, and morphological interpretations

Novel biocomposites from poly(trimethylene terephthalate) and recycled carbon fibres

Effects of Carbon Nanotubes/Graphene Nanoplatelets Hybrid Systems on the Structure and Properties of Polyetherimide-Based Foams

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