Transport properties of organic vapors in nanocomposites of organophilic layered silicate and syndiotactic polypropylene

Gorrasi, Giuliana; Tortora, Mariarosaria; Vittoria, Vittoria; Kaempfer, Dirk; Mülhaupt, Rolf

doi:10.1016/s0032-3861(03)00284-2

Cited by 93 publications

(61 citation statements)

References 44 publications

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“…In the literature, it has been shown [11,12] that the presence of clay particles in the polypropylene matrix decreases the permeability of the resulting nanocomposite materials with respect to certain solvents. This was attributed to the fact that the oriented clay platelets block the advancement of the solvent molecules and force them to follow a more tortuous path.…”

Section: Resultsmentioning

confidence: 99%

Investigation of water absorption in clay-reinforced polypropylene nanocomposites

Ladhari

Daly

Belhadjsalah

et al. 2010

Polymer Degradation and Stability

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Section: Resultsmentioning

confidence: 99%

Investigation of water absorption in clay-reinforced polypropylene nanocomposites

Ladhari

Daly

Belhadjsalah

et al. 2010

Polymer Degradation and Stability

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“…Increased moduli and yield stress but decreased ultimate elongation with enhanced exfoliation were reported. [9][10][11][12][13][14][15] Decreased permeability of organic vapors through PP nanocomposites with increasing OM content was described by Gorrasi et al [19] It is well known that solid particles can act as nucleating agents in polymer melts, hence influencing the polymer crystallinity, crystallization rate, and crystal size. A decrease in spherulite size and an increase in crystallization rate with augmenting clay content in PP nanocomposites have been reported.…”

Section: Introductionmentioning

confidence: 91%

Poly(propylene)‐Layered Silicate Nanocomposites: Gas Permeation Properties and Clay Exfoliation

Osman

Mittal

Suter

2007

Macro Chemistry & Physics

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To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted organic ions. With increasing length and number of the alkyl chains, an increase in the basal‐plane spacing (d‐spacing) of the OM was observed. The d‐spacing also increased with increasing CEC of the clay (decreasing available area/cation). The OMs were compounded with PP and their effect on the crystallinity and gas‐barrier properties of the polymer was investigated. The OM had no influence on the degree of crystallinity of PP under the processing conditions used. Oxygen permeation through the composites decreased, depending on the cross‐sectional area of the exchanged organic cation and the CEC of the clay. These parameters control the mineral surface coverage (consequently the surface energy) as well as the tilt angle of the alkyl chains to the mineral surface, and hence the d‐spacing. Increasing the length of the alkyl chains and their number per cation enhanced the d‐spacing, clay exfoliation, and the gas‐barrier properties of the composites. A mixed morphology, consisting of delaminated aluminosilicate layers and OM tactoids of varying thickness was observed but no intercalation took place. The oxygen permeation coefficient of the nanocomposites was found to be a non‐linear function of the volume fraction of the inorganic part of the OM.magnified image

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“…Gorrasi et al 109 studied the effect of FM on the transport properties of CH 2 Cl 2 and n-C 5 H 12 vapors through syndiotactic poly (propylene) (sPP) film containing up to 20 wt% FM-ODA. The system was compatibilized by addition of (isotactic) iPP-g-MA.…”

Section: Polyolefin Matrixmentioning

confidence: 99%

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Utracki

Sepehr

Boccaleri

2007

Polymers for Advanced Techs

376

252

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Synthetic, layered nano-particles for polymeric nanocomposites (PNC's)Utracki, L. A.; Sepehr, M.; Boccaleri, E.Contact us / Contactez nous: nparc.cisti@nrc-cnrc.gc.ca.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site Web page / page Web http://dx.doi.org/10.1002/pat.852 http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=fr LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en This review discusses preparation and use of the synthetic layered nanoparticles in polymer matrices, i.e., in the polymeric nanocomposites (PNCs). Several types of synthetic or semi-synthetic layered materials are considered, namely the phyllosilicates (clays), silicic acid (magadiite), layered double hydroxides (LDHs), zirconium phosphates (ZrPs), and di-chalcogenides. The main advantage of synthetic clays is their chemical purity (e.g. absence of amorphous and gritty contaminants, as well as arsenic, iron, and other heavy metals), white to transparent color that assures reproducibly of brightly colored products, as well as a wide range of aspect ratios, p ¼ 20 to £6000. Several large scale production facilities have been established. The synthetic clay and LDH industries are oriented toward big volume markets: catalysis, foodstuff, cosmetics, pharmaceuticals, toiletry, etc. The use of these materials in PNCs is limited to synthetic clays and LDHs, mainly for reinforcement, permeability control, reduction of flammability, and stabilization, e.g. during dehydrohalogenation of chlorinated macromolecules. The use of lamellar ZrPs and di-chalcogenides is at the laboratory stage of functional polymeric systems development, e.g. for electrically conductive materials, catalysts or support for catalysts, in photochemistry, molecular and chiral recognition, or in fuel cell technologies, etc. Copyright # 2007 John Wiley & Sons, Ltd.KEYWORDS: polymeric nanocomposites; nanoparticles; clay; layered double hydroxides; matrix POLYMERS FOR ADVANCED TECHNOLOGIES Polym. Adv. Technol. 2007; 18: 1-37 Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/pat.852 AUTHORS' BIOGRAPHIESDr Leszek A. Utracki was born and educated (up to Habilitation) in Poland. After the post-doctoral stage at USC in Los Angeles with Robert Simha he settled in Canada. His passionate research interest has been within the field of thermodynamics, rheology and processing of multicomponent, multiphase polymeric systems. During the 55 years in the profession he has published several hundred articles, book chapters, books, patents, etc., which has placed him on the ISI li...

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Transport properties of organic vapors in nanocomposites of organophilic layered silicate and syndiotactic polypropylene

Cited by 93 publications

References 44 publications

Investigation of water absorption in clay-reinforced polypropylene nanocomposites

Investigation of water absorption in clay-reinforced polypropylene nanocomposites

Poly(propylene)‐Layered Silicate Nanocomposites: Gas Permeation Properties and Clay Exfoliation

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

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