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Oxygen and water vapor barrier properties of MMT nanocomposites from low density polyethylene or EPM with grafted succinic groups.
J Nanosci Nanotechnol. 2008 Apr; 8(4):1690-9.JN

Abstract

LDPE, EPM and their derivatives containing a moderate amount (0.08-1.8 by mol) of diethylsuccinate or succinic anhydryde groups were used as matrices in blending with different amount of organophilic montmorillonites and the resulting composite morphology and structure (by XRD, SEM, TEM microscopy, DSC analysis and selective solvent extraction) were studied with reference to the polar groups/MMT ratio. Exfoliated, intercalated and mixed morphologies were achieved. High concentrations of polar groups grafted to the polyolefin and montmorillonite loading not larger than 5% wt were favourable for obtaining high exfoliation degree. Particularly in the exfoliated MMT composite LDPE had lower crystallinity degree, while EPM showed increased glass transition temperature and reduced solubility in hot toluene. Moreover, oxygen and water vapor barrier property improvement was observed in films where MMT exhibits either exfoliated or intercalated morphologies. Strong interactions with the montmorillonite particle surface through the polar groups grafted to the polyolefin seems to be the basic effect responsible for the morphology and peculiar properties. A model based on the reduced mobility of the polymer located near the particle surface or inside the MMT gallery (confined phase) was proposed to explain the observed oxygen permeability reduction, the T(g) increase and solubility of poly(ethylene-ran-propylene)/MMT nanocomposites.

Authors+Show Affiliations

Passaglia E
ICCOM-CNR, Pisa section, c/o Dipartimento di Chimica e Chimica Industriale, Via Risorgimento, 35-56126 Pisa, Italy.
Bertoldo M
No affiliation info available
Ceriegi S
No affiliation info available
Sulcis R
No affiliation info available
Narducci P
No affiliation info available
Conzatti L
No affiliation info available

MeSH

AbsorptionAluminum SilicatesClayCrystallizationMacromolecular SubstancesMaterials TestingModels, ChemicalMolecular ConformationNanostructuresNanotechnologyOxygenParticle SizePolyethylenePolymersPolypropylenesSurface PropertiesWater

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18572566

Citation

Passaglia, Elisa, et al. "Oxygen and Water Vapor Barrier Properties of MMT Nanocomposites From Low Density Polyethylene or EPM With Grafted Succinic Groups." Journal of Nanoscience and Nanotechnology, vol. 8, no. 4, 2008, pp. 1690-9.
Passaglia E, Bertoldo M, Ceriegi S, et al. Oxygen and water vapor barrier properties of MMT nanocomposites from low density polyethylene or EPM with grafted succinic groups. J Nanosci Nanotechnol. 2008;8(4):1690-9.
Passaglia, E., Bertoldo, M., Ceriegi, S., Sulcis, R., Narducci, P., & Conzatti, L. (2008). Oxygen and water vapor barrier properties of MMT nanocomposites from low density polyethylene or EPM with grafted succinic groups. Journal of Nanoscience and Nanotechnology, 8(4), 1690-9.
Passaglia E, et al. Oxygen and Water Vapor Barrier Properties of MMT Nanocomposites From Low Density Polyethylene or EPM With Grafted Succinic Groups. J Nanosci Nanotechnol. 2008;8(4):1690-9. PubMed PMID: 18572566.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxygen and water vapor barrier properties of MMT nanocomposites from low density polyethylene or EPM with grafted succinic groups. AU - Passaglia,Elisa, AU - Bertoldo,Monica, AU - Ceriegi,Silvia, AU - Sulcis,Roberta, AU - Narducci,Piero, AU - Conzatti,Lucia, PY - 2008/6/25/pubmed PY - 2008/7/23/medline PY - 2008/6/25/entrez SP - 1690 EP - 9 JF - Journal of nanoscience and nanotechnology JO - J Nanosci Nanotechnol VL - 8 IS - 4 N2 - LDPE, EPM and their derivatives containing a moderate amount (0.08-1.8 by mol) of diethylsuccinate or succinic anhydryde groups were used as matrices in blending with different amount of organophilic montmorillonites and the resulting composite morphology and structure (by XRD, SEM, TEM microscopy, DSC analysis and selective solvent extraction) were studied with reference to the polar groups/MMT ratio. Exfoliated, intercalated and mixed morphologies were achieved. High concentrations of polar groups grafted to the polyolefin and montmorillonite loading not larger than 5% wt were favourable for obtaining high exfoliation degree. Particularly in the exfoliated MMT composite LDPE had lower crystallinity degree, while EPM showed increased glass transition temperature and reduced solubility in hot toluene. Moreover, oxygen and water vapor barrier property improvement was observed in films where MMT exhibits either exfoliated or intercalated morphologies. Strong interactions with the montmorillonite particle surface through the polar groups grafted to the polyolefin seems to be the basic effect responsible for the morphology and peculiar properties. A model based on the reduced mobility of the polymer located near the particle surface or inside the MMT gallery (confined phase) was proposed to explain the observed oxygen permeability reduction, the T(g) increase and solubility of poly(ethylene-ran-propylene)/MMT nanocomposites. SN - 1533-4880 UR - https://www.unboundmedicine.com/medline/citation/18572566/Oxygen_and_water_vapor_barrier_properties_of_MMT_nanocomposites_from_low_density_polyethylene_or_EPM_with_grafted_succinic_groups_ DB - PRIME DP - Unbound Medicine ER -