Dynamic mechanical and morphological properties of polycarbonate/multi-walled carbon nanotube composites

Sung, Youngje; Kum, C.K.; Lee, Heon Sang; Byon, N.S.; Yoon, Ho-Gyu; Kim, W.N.

doi:10.1016/j.polymer.2005.04.075

Cited by 88 publications

(63 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…About 5-6 mg of sample was first heated from room temperature to 260 C at a heating rate of 10 C/min and then held at that temperature for 5 min to remove the thermal history of material. The sample was then cooled down to 35 C at a rate of 10 C/min and again heated to 260 C at the same rate. Cooling scans were used for crystallization studies and second heating scans for their melting behavior.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

“…These observations also supports lubricating as well as reinforcing properties of MWCNTs as reported in the literature. 35 Tan d plots were used to calculate T g [noted as peak temperature] of PTT/ MWCNT composites. From Figure 5 it can be seen that incorporation of carbon nanotubes showed no significant shift in tan d peak which shows that incorporation of MWCNT showed no effect on glass transition temperature of PTT.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

See 1 more Smart Citation

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

Gupta

Choudhary

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Multiwalled carbon nanotubes (MWCNTs) were synthesized using chemical vapor deposition and poly(trimethylene terephthalate) (PTT)/MWCNT composites with varying amounts of MWCNTs were prepared by melt compounding using DSM micro-compounder. Morphological characterization by SEM and TEM showed uniform dispersion of MWCNTs in PTT matrix upto 2% (w/w) MWCNT loading. Incorporation of MWCNTs showed no effect on percent crystallinity but affected the crystallite dimensions and increased the crystallization temperature. Dynamic mechanical characterization of composites showed an increase in storage modulus of PTT upon incorporation of MWCNTs above glass transition temperature. The electrical conductivity of PTT/MWCNT composites increased upon incorporation of MWCNTs and percolation threshold concentration was obtained at a loading of MWCNTs in the range of 1-1.5% (w/w). V C 2011Wiley Periodicals, Inc. J Appl Polym Sci 123: [1548][1549][1550][1551][1552][1553][1554][1555][1556] 2012

show abstract

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

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

Gupta

Choudhary

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Several authors have specifically studied the properties of PC-MWCNT composites, focusing on the melt rheology (Pötschke et al 2002;Du et al 2004;Abdel-Goad and Pötschke 2005;Sung et al 2005;Alig et al 2008), the mechanical response (Eitan et al 2006;Fornes et al 2006;Satapathy et al 2007), and the electrical properties (Du et al 2004;Sung et al 2006;Alig et al 2008;Saphiannikova et al 2012). Some authors have employed a combination of characterisation methods, such as the simultaneous electrical and rheological measurements of Alig et al (2008) and Zeiler et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic melt rheology and time–temperature superposition of polycarbonate–multi-walled carbon nanotube nanocomposites

2013

View full text Add to dashboard Cite

This work investigates the linear and non-linear viscoelastic melt rheology of four grades of polycarbonate melt compounded with 3 wt% Nanocyl NC7000 multiwalled carbon nanotubes and of the matching matrix polymers. Amplitude sweeps reveal an earlier onset of nonlinearity and a strain overshoot in the nanocomposites. Mastercurves are constructed from isothermal frequency sweeps using vertical and horizontal shifting. Although all nanocomposites exhibit a second plateau at ∼10 5 Pa, the relaxation times estimated from the peak in loss tangent are not statistically different from those of pure melts estimated from cross-over frequencies: all relaxation timescales scale with molar mass in the same way, evidence that the relaxation of the polymer network is the dominant mechanism in both filled and unfilled materials. Non-linear rheology is also measured in large amplitude oscillatory shear. A comparison of the responses from frequency and amplitude sweep experiments reveals the importance of strain and temperature history on the response of such nanocomposites.

show abstract

“…On the other hand, the glassy modulus slightly increases (10%) with magnetite content. This behavior seems to indicate some reinforcement effect of magnetite particles on the epoxy matrix [55].…”

Section: Nanocomposites Characterizationmentioning

confidence: 79%

Magnetic nanocomposites based on hydrogenated epoxy resin

González

Martín-Fabiani

Baselga

et al. 2012

Materials Chemistry and Physics

View full text Add to dashboard Cite

A hydrogenated derivative of diglycidylether of bisphenol A (HDGEBA) has been successfully employed to prepare magnetic thermosetting nanocomposites. Magnetite nanoparticles of ≈10 nm modified with oleic acid were synthesized by co-precipitation of ferric and ferrous salts in ammonium solutions. Nanocomposites with amounts up to 5% ww −1 of nanoparticles were dispersed in HDGEBA by co-solvent method and cured with m-xylilendiamine. Both the particles and nanocomposites were characterized by FTIR, DSC, TGA, XRD, TEM, DMTA and VSM. Due to the lower polarity of the hydrogenated resin, the enhanced compatibility with magnetite oleic coverage allowed obtaining good dispersions of the nanoparticles for compositions up 1% ww −1 , while at higher concentration agglomerates were observed. Two behaviors in the thermal properties were obtained: for compositions below 1% ww −1 the glass tran-sition temperature increased with the amount of nanoparticles, whereas for higher amounts the glass transition temperature decreased. Superparamagnetic behavior was observed in both the particles and the nanocomposites; the blockage temperature gradually increases with loading but it is lower than the observed for bulk magnetite nanoparticles. This fact reflects that nanoparticle-nanoparticle distances in the nanocomposites gradually decrease with loading which is in accordance with a good dispersion state for low loadings and the presence of aggregates at high loadings.

show abstract

Dynamic mechanical and morphological properties of polycarbonate/multi-walled carbon nanotube composites

Cited by 88 publications

References 19 publications

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

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

Viscoelastic melt rheology and time–temperature superposition of polycarbonate–multi-walled carbon nanotube nanocomposites

Magnetic nanocomposites based on hydrogenated epoxy resin

Contact Info

Product

Resources

About