Vapor barrier properties of polycaprolactone montmorillonite nanocomposites: effect of clay dispersion

Polymer ◽  
2003 ◽  
Vol 44 (8) ◽  
pp. 2271-2279 ◽  
Author(s):  
Giuliana Gorrasi ◽  
Mariarosaria Tortora ◽  
Vittoria Vittoria ◽  
Eric Pollet ◽  
Bénédicte Lepoittevin ◽  
...  
2010 ◽  
Vol 11 (7) ◽  
pp. 1796-1801 ◽  
Author(s):  
Qinqin Dang ◽  
Shoudong Lu ◽  
Shen Yu ◽  
Pingchuan Sun ◽  
Zhi Yuan

2008 ◽  
Vol 44 (12) ◽  
pp. 3915-3921 ◽  
Author(s):  
A. Giannakas ◽  
C.G. Spanos ◽  
N. Kourkoumelis ◽  
T. Vaimakis ◽  
A. Ladavos

2008 ◽  
Vol 2008 ◽  
pp. 1-11 ◽  
Author(s):  
S. Benali ◽  
A. Olivier ◽  
P. Brocorens ◽  
L. Bonnaud ◽  
M. Alexandre ◽  
...  

Exfoliated nanocomposites are prepared by dispersion of poly(ε-caprolactone) (PCL) grafted montmorillonite nanohybrids used as masterbatches in poly(styrene-co-acrylonitrile) (SAN). The PCL-grafted clay nanohybrids with high inorganic content are synthesized by in situ intercalative ring-opening polymerization ofε-caprolactone between silicate layers organomodified by alkylammonium cations bearing two hydroxyl functions. The polymerization is initiated by tin alcoholate species derived from the exchange reaction of tin(II) bis(2-ethylhexanoate) with the hydroxyl groups borne by the ammonium cations that organomodified the clay. These highly filled PCL nanocomposites (25 wt% in inorganics) are dispersed as masterbatches in commercial poly(styrene-co-acrylonitrile) by melt blending. SAN-based nanocomposites containing 3 wt% of inorganics are accordingly prepared. The direct blend of SAN/organomodified clay is also prepared for sake of comparison. The clay dispersion is characterized by wide-angle X-ray diffraction (WAXD), atomic force microscopy (AFM), and solid state NMR spectroscopy measurements. The thermal properties are studied by thermogravimetric analysis. The flame retardancy and gas barrier resistance properties of nanocomposites are discussed both as a function of the clay dispersion and of the matrix/clay interaction.


2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
Eleonora Erdmann ◽  
Delicia Acosta ◽  
Victor J. R. R. Pita ◽  
Fernanda E. Monasterio ◽  
María C. Carrera ◽  
...  

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Mohammad Sirousazar ◽  
Mortaza Yari ◽  
Bahram Fathi Achachlouei ◽  
Jalal Arsalani ◽  
Yagoub Mansoori

AbstractPolypropylene / organically modified montmorillonite nanocomposites were prepared using polypropylene-graft-maleic anhydride as compatibilizer by the melt blending method. The structural, mechanical and gas barrier properties of the prepared nanocomposites containing various amounts of organoclay (i.e. 0, 2, 5, 7 and 10 wt%) were investigated to evaluate their potential as food packaging materials. The X-ray diffraction (XRD) profiles of the nanocomposites and the transmission electron microscopy (TEM) micrograph showed that polypropylene chains have intercalated between silicate layers of organoclay. The mechanical properties tests showed that the tensile modulus and strength of the nanocomposites increased on increasing the clay loading, while the strain at the break decreased. The gas permeability tests demonstrated that adding organoclay into polypropylene matrix enhances the barrier property of the matrix against O2 , CO2 and water vapour.


2010 ◽  
Vol 50 (7) ◽  
pp. 1400-1407 ◽  
Author(s):  
Roberta Peila ◽  
Giulio Malucelli ◽  
Massimo Lazzari ◽  
Aldo Priola

2014 ◽  
Vol 636 ◽  
pp. 85-88
Author(s):  
Xin Hua Yuan ◽  
Li Yin Han ◽  
Qiu Su ◽  
Wen Hua Guo ◽  
Hong Xing Xu ◽  
...  

Using methyl triethoxysilane, tetrabutyl titanate and ethyl acetoacetate as raw materials, the Si-Ti polymer was synthesized to prepare Si-Ti polymer/montmorillonite nanocomposites. The effects of OMMT content on the impact properties and barrier performance of nanocomposites were investigated. The results show that with the increasing of OMMT content, the impact properties of nanocomposites are improved significantly. The impact strength of nanocomposite with 10wt% OMMT is about twice times than that without OMMT. The gas barrier properties of nanocomposites are also improved significantly. Compared with pure Si-Ti polymer, the water absorption of nanocomposite with 6wt% OMMT is decreased by 60.3%.


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