The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

Marie-pierre Laborie - One of the best experts on this subject based on the ideXlab platform.

  • water absorption and oxygen barrier characteristics of Ethylene Vinyl Alcohol films
    Journal of Food Engineering, 2011
    Co-Authors: K. Khanah Mokwena, Juming Tang, Marie-pierre Laborie
    Abstract:

    Oxygen transmission rates (OTR) of two multilayer films containing Ethylene Vinyl Alcohol (EVOH) were analyzed after water absorption at 121 °C. The films, referred to as film A and film B, were laminated film of PET/EVOH/PP and coextruded film of PET/PP/nylon 6/EVOH/nylon 6/PP, respectively. OTR increased with water absorption for both films. Graphical representation of data revealed two apparent linear regions describing the change of OTR with water absorption for both films. At low water contents (up to 4%) OTR were similar for the two films but differed dramatically at higher water contents. Water sorption characteristics of two monolayer EVOH barrier films (biaxially oriented and non-oriented) were determined at 25 °C using standard gravimetric method. Moisture sorption isotherms were analyzed using the Guggenheim-Anderson-de Boer model and the cluster theory of Zimm and Lundberg to evaluate the interactions between water and EVOH.

  • Water absorption and oxygen barrier characteristics of Ethylene Vinyl Alcohol films
    Journal of Food Engineering, 2011
    Co-Authors: K. Khanah Mokwena, Juming Tang, Marie-pierre Laborie
    Abstract:

    Oxygen transmission rates (OTR) of two multilayer films containing Ethylene Vinyl Alcohol (EVOH) were analyzed after water absorption at 121 °C. The films, referred to as film A and film B, were laminated film of PET/EVOH/PP and coextruded film of PET/PP/nylon 6/EVOH/nylon 6/PP, respectively. OTR increased with water absorption for both films. Graphical representation of data revealed two apparent linear regions describing the change of OTR with water absorption for both films. At low water contents (up to 4%) OTR were similar for the two films but differed dramatically at higher water contents. Water sorption characteristics of two monolayer EVOH barrier films (biaxially oriented and non-oriented) were determined at 25 °C using standard gravimetric method. Moisture sorption isotherms were analyzed using the Guggenheim-Anderson-de Boer model and the cluster theory of Zimm and Lundberg to evaluate the interactions between water and EVOH. © 2011 Elsevier Ltd. All rights reserved.

K. Khanah Mokwena - One of the best experts on this subject based on the ideXlab platform.

  • water absorption and oxygen barrier characteristics of Ethylene Vinyl Alcohol films
    Journal of Food Engineering, 2011
    Co-Authors: K. Khanah Mokwena, Juming Tang, Marie-pierre Laborie
    Abstract:

    Oxygen transmission rates (OTR) of two multilayer films containing Ethylene Vinyl Alcohol (EVOH) were analyzed after water absorption at 121 °C. The films, referred to as film A and film B, were laminated film of PET/EVOH/PP and coextruded film of PET/PP/nylon 6/EVOH/nylon 6/PP, respectively. OTR increased with water absorption for both films. Graphical representation of data revealed two apparent linear regions describing the change of OTR with water absorption for both films. At low water contents (up to 4%) OTR were similar for the two films but differed dramatically at higher water contents. Water sorption characteristics of two monolayer EVOH barrier films (biaxially oriented and non-oriented) were determined at 25 °C using standard gravimetric method. Moisture sorption isotherms were analyzed using the Guggenheim-Anderson-de Boer model and the cluster theory of Zimm and Lundberg to evaluate the interactions between water and EVOH.

  • Water absorption and oxygen barrier characteristics of Ethylene Vinyl Alcohol films
    Journal of Food Engineering, 2011
    Co-Authors: K. Khanah Mokwena, Juming Tang, Marie-pierre Laborie
    Abstract:

    Oxygen transmission rates (OTR) of two multilayer films containing Ethylene Vinyl Alcohol (EVOH) were analyzed after water absorption at 121 °C. The films, referred to as film A and film B, were laminated film of PET/EVOH/PP and coextruded film of PET/PP/nylon 6/EVOH/nylon 6/PP, respectively. OTR increased with water absorption for both films. Graphical representation of data revealed two apparent linear regions describing the change of OTR with water absorption for both films. At low water contents (up to 4%) OTR were similar for the two films but differed dramatically at higher water contents. Water sorption characteristics of two monolayer EVOH barrier films (biaxially oriented and non-oriented) were determined at 25 °C using standard gravimetric method. Moisture sorption isotherms were analyzed using the Guggenheim-Anderson-de Boer model and the cluster theory of Zimm and Lundberg to evaluate the interactions between water and EVOH. © 2011 Elsevier Ltd. All rights reserved.

Niels Zorger - One of the best experts on this subject based on the ideXlab platform.

Yves Germain - One of the best experts on this subject based on the ideXlab platform.

  • Tensile drawing of Ethylene/Vinyl-Alcohol copolymers: 3. Biaxial orientation
    Polymer, 1999
    Co-Authors: Roland Seguela, Karina Djezzar, Laurence Penel, J M Lefebvre, Yves Germain
    Abstract:

    Abstract The phenomenological and structural aspects of biaxial drawing of a Vinyl Alcohol-rich Ethylene/Vinyl-Alcohol copolymer is studied as a function of temperature. For draw temperature above the crystalline mechanical relaxation, T α , sharp necks accompanied with catastrophic fissures develop during simultaneous biaxial drawing as well as in the first step of sequential biaxial drawing. For draw temperature below T α , simultaneous biaxial drawing can be successfully achieved via propagation of diffuse necking so that a minimum macroscopic draw ratio of about 3 × 3 is required to obtain a uniform plastic strain. The strong interaction anisotropy of the sheet-like structure of the monoclinic phase is responsible for the fissuring trend at T > T α . In contrast, the isotropic mesomorphic phase that is strain-induced at T T α enables simultaneous biaxial drawing. The development of a planar texture suggests that the transformation results from transverse crystal slip. However, the random distribution of the H-bonds in the mesomorphic phase is rather consistent with an accumulation process of conformational defects that remain frozen in the crystal.

  • tensile drawing of Ethylene Vinyl Alcohol copolymers 3 biaxial orientation
    Polymer, 1999
    Co-Authors: Roland Seguela, Karina Djezzar, Laurence Penel, J M Lefebvre, Yves Germain
    Abstract:

    Abstract The phenomenological and structural aspects of biaxial drawing of a Vinyl Alcohol-rich Ethylene/Vinyl-Alcohol copolymer is studied as a function of temperature. For draw temperature above the crystalline mechanical relaxation, T α , sharp necks accompanied with catastrophic fissures develop during simultaneous biaxial drawing as well as in the first step of sequential biaxial drawing. For draw temperature below T α , simultaneous biaxial drawing can be successfully achieved via propagation of diffuse necking so that a minimum macroscopic draw ratio of about 3 × 3 is required to obtain a uniform plastic strain. The strong interaction anisotropy of the sheet-like structure of the monoclinic phase is responsible for the fissuring trend at T > T α . In contrast, the isotropic mesomorphic phase that is strain-induced at T T α enables simultaneous biaxial drawing. The development of a planar texture suggests that the transformation results from transverse crystal slip. However, the random distribution of the H-bonds in the mesomorphic phase is rather consistent with an accumulation process of conformational defects that remain frozen in the crystal.

Juming Tang - One of the best experts on this subject based on the ideXlab platform.

  • water absorption and oxygen barrier characteristics of Ethylene Vinyl Alcohol films
    Journal of Food Engineering, 2011
    Co-Authors: K. Khanah Mokwena, Juming Tang, Marie-pierre Laborie
    Abstract:

    Oxygen transmission rates (OTR) of two multilayer films containing Ethylene Vinyl Alcohol (EVOH) were analyzed after water absorption at 121 °C. The films, referred to as film A and film B, were laminated film of PET/EVOH/PP and coextruded film of PET/PP/nylon 6/EVOH/nylon 6/PP, respectively. OTR increased with water absorption for both films. Graphical representation of data revealed two apparent linear regions describing the change of OTR with water absorption for both films. At low water contents (up to 4%) OTR were similar for the two films but differed dramatically at higher water contents. Water sorption characteristics of two monolayer EVOH barrier films (biaxially oriented and non-oriented) were determined at 25 °C using standard gravimetric method. Moisture sorption isotherms were analyzed using the Guggenheim-Anderson-de Boer model and the cluster theory of Zimm and Lundberg to evaluate the interactions between water and EVOH.

  • Water absorption and oxygen barrier characteristics of Ethylene Vinyl Alcohol films
    Journal of Food Engineering, 2011
    Co-Authors: K. Khanah Mokwena, Juming Tang, Marie-pierre Laborie
    Abstract:

    Oxygen transmission rates (OTR) of two multilayer films containing Ethylene Vinyl Alcohol (EVOH) were analyzed after water absorption at 121 °C. The films, referred to as film A and film B, were laminated film of PET/EVOH/PP and coextruded film of PET/PP/nylon 6/EVOH/nylon 6/PP, respectively. OTR increased with water absorption for both films. Graphical representation of data revealed two apparent linear regions describing the change of OTR with water absorption for both films. At low water contents (up to 4%) OTR were similar for the two films but differed dramatically at higher water contents. Water sorption characteristics of two monolayer EVOH barrier films (biaxially oriented and non-oriented) were determined at 25 °C using standard gravimetric method. Moisture sorption isotherms were analyzed using the Guggenheim-Anderson-de Boer model and the cluster theory of Zimm and Lundberg to evaluate the interactions between water and EVOH. © 2011 Elsevier Ltd. All rights reserved.