Barrier properties of polymer/clay nanocomposites

Sorrentino, Andrea; Gorrasi, Giuliana; Tortora, Mariarosaria; Vittoria, Vittoria

doi:10.1533/9781845691127.1.273

Cited by 36 publications

(34 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The shift of the glass transition temperature at lower temperatures is also worth noting in all the composite samples. Probably, as observed in other polymer nanocomposites systems, the presence of CNT in the matrix induces an increase of free volume, and consequently an increase in the molecular mobility at lower temperature [24,25].…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 57%

Influence of multi-walled carbon nanotubes on the β form crystallization of syndiotactic polystyrene at low temperature

Sorrentino¹,

Vertuccio²,

Vittoria³

2010

Express Polym. Lett.

Self Cite

View full text Add to dashboard Cite

Abstract. Syndiotactic polystyrene (sPS) samples were quenched at low temperature (0°C) in the presence of Multi-Walled Carbon Nanotubes (MWCNT) at different concentrations. The influence of carbon nanotubes on the structure and physical properties of sPS composites was investigated by SEM, X-ray diffractograms, DSC (Differential Scanning Calorimetry), and Dynamic Mechanical Analysis (DMA). A good dispersion of the carbon nanotubes in the sPS matrix was found, at least for the low MWCNT concentration, whereas opposite effects were noticed on Tg and elastic modulus, depending on concentration. The pristine sPS sample was almost amorphous at 0°C, whereas in the filled samples the crystallinity increased on increasing the MWCNT concentration, indicating a strong nucleation effect of the nanotubes. Interestingly, in spite of the low temperature, the β crystallinity was induced and this crystalline form increases on increasing the carbon nanotube concentration, being dominant (68% of the total crystallinity) already at 3 wt% of MWCNT concentration.

show abstract

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 57%

Influence of multi-walled carbon nanotubes on the β form crystallization of syndiotactic polystyrene at low temperature

Sorrentino¹,

Vertuccio²,

Vittoria³

2010

Express Polym. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…where, h represents the orientation angle and b represents the ratio between the interface diffusivity and the bulk polymer diffusivity [27]. Several experimental results, discussed and interpreted with the aid of the previous models, have show that in addition to the aspect ratio and clay concentration, the polymer clay interactions as well as the sheets orientation are important factors controlling the barrier properties [27].…”

Section: Barrier Model In Polymer Nanocompositesmentioning

confidence: 99%

“…Several experimental results, discussed and interpreted with the aid of the previous models, have show that in addition to the aspect ratio and clay concentration, the polymer clay interactions as well as the sheets orientation are important factors controlling the barrier properties [27].…”

Section: Barrier Model In Polymer Nanocompositesmentioning

confidence: 99%

“…where D m is the penetrant diffusion coefficient in the polymer matrix, s is a geometric impedance (i.e, tortuosity) factor, and b is a factor that takes into account both, the chain immobilization and the interface formation due to the filler particles [27]. In particular, depending on the filler-penetrants interactions, b can be higher or lower than the unity.…”

Section: Barrier Model In Polymer Nanocompositesmentioning

confidence: 99%

“…Sorrentino et al [27] proposed a model that predicts effective diffusivity in heterogeneous systems with dispersed impermeable domains of variable orientation and distribution. In addition to the sinuous pathways formation, the model takes into account the formation of an interface region between the polymer bulk and the clay sheets that can influence the barrier properties of the composite.…”

Section: Barrier Model In Polymer Nanocompositesmentioning

confidence: 99%

See 2 more Smart Citations

Permeability in Clay/Polyesters Nano-Biocomposites

Sorrentino

Gorrasi

Vittoria

2012

Environmental Silicate Nano-Biocomposites

View full text Add to dashboard Cite

In this chapter we focus on the barrier properties of nanocomposite of biodegradable polyesters with layered inorganic fillers. First of all, to better understand the influence of the lamellar inorganic fillers on the permeability, the theory of permeation and the barrier models so far developed for polymer nanocomposites are reviewed. Afterwards the barrier properties of the most important biodegradable polyesters filled with inorganic lamellar solids, such as Polylactic acid (PLA), Polycaprolactone (PCL), Polyhydroxbutyrate (PHB), and Polybutylenesuccinate (PBS) are reviewed and the outstanding results enlightened. As a general trend, the best improvement of barrier properties is related to the exfoliation of clay platelets into the polymeric matrix, and this in turn is dependent on the chemical structure of the clay, the organic modification, the filler concentration and the processing procedure to prepare the composite. Where possible, all these parameters were reported and correlated with the final properties. Also the contrasting effect of clays on the two parameters determining the water permeability, that is sorption and diffusion, is reported in many cases.

show abstract

Biopolymer Coatings for Paper and Paperboard

Aulin

Lindström

2011

Biopolymers – New Materials for Sustainable Films and Coatings

View full text Add to dashboard Cite

Barrier properties of polymer/clay nanocomposites

Cited by 36 publications

References 51 publications

Influence of multi-walled carbon nanotubes on the β form crystallization of syndiotactic polystyrene at low temperature

Influence of multi-walled carbon nanotubes on the β form crystallization of syndiotactic polystyrene at low temperature

Permeability in Clay/Polyesters Nano-Biocomposites

Biopolymer Coatings for Paper and Paperboard

Contact Info

Product

Resources

About