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Nathalie Mignard - One of the best experts on this subject based on the ideXlab platform.

  • thermally reversible crosslinked polyethylene using diels alder reaction in Molten State
    Reactive & Functional Polymers, 2010
    Co-Authors: Sylvain Magana, Amar Zerroukhi, Corinne Jegat, Nathalie Mignard
    Abstract:

    Abstract Thermally reversible crosslinked polyethylene was prepared by Diels–Alder (DA) and retro Diels–Alder (rDA) reaction. Maleimide/furan adduct was used as crosslinking agent. Dienophile named 11-maleimido-undecanoic acid was first synthesized and between this dienophile and commercial 3-(2-furyl) propanoic acid, the DA reaction was studied to determine DA and rDA reactions temperatures in the solid State. Then, an original modification method was employed to graft the two molecules onto the Lotader® poly(ethylene-co-glycidyl methacrylate) in one step procedure. The DA and rDA reactions between diene and dienophile grafted moieties are followed by FT-IR analysis on a thin film. Readily polymer network is synthesized and the cycle of DA and retro-DA reactions is repeatable with no significant polymer degradation.

Sylvain Magana - One of the best experts on this subject based on the ideXlab platform.

  • thermally reversible crosslinked polyethylene using diels alder reaction in Molten State
    Reactive & Functional Polymers, 2010
    Co-Authors: Sylvain Magana, Amar Zerroukhi, Corinne Jegat, Nathalie Mignard
    Abstract:

    Abstract Thermally reversible crosslinked polyethylene was prepared by Diels–Alder (DA) and retro Diels–Alder (rDA) reaction. Maleimide/furan adduct was used as crosslinking agent. Dienophile named 11-maleimido-undecanoic acid was first synthesized and between this dienophile and commercial 3-(2-furyl) propanoic acid, the DA reaction was studied to determine DA and rDA reactions temperatures in the solid State. Then, an original modification method was employed to graft the two molecules onto the Lotader® poly(ethylene-co-glycidyl methacrylate) in one step procedure. The DA and rDA reactions between diene and dienophile grafted moieties are followed by FT-IR analysis on a thin film. Readily polymer network is synthesized and the cycle of DA and retro-DA reactions is repeatable with no significant polymer degradation.

Mohamed Taha - One of the best experts on this subject based on the ideXlab platform.

  • Poly[ethylene-co-(vinyl alcohol)]-graft-poly(e-caprolactone) Synthesis by Reactive Extrusion, 1 - Structural and Kinetic Studya
    Macromolecular Materials and Engineering, 2009
    Co-Authors: Frédéric Becquart, Yvan Chalamet, Jie Chen, Y. Zhao, Mohamed Taha
    Abstract:

    Chemical modification of EVOH in the Molten State at 185 °C by a grafting from process of poly(ε‐caprolactone) in batch was studied. 1H NMR was used to characterize the structure evolutions of PCL grafts. In addition to grafting reactions, dynamic covalent transesterification reactions between EVOH residual alcohols and the polyester grafts led to a redistribution of the PCL grafts length. $\mathop {\overline {Dp} }\nolimits_n $equation image up to 27 and SR up to 80% were obtained. Experiments made in a corotating mini twin‐screw extruder also confirmed these results. The effect of the alcohol to caprolactone ratio and catalyst concentration (SnOct2) on kinetic evolution showed that few minutes were necessary to complete the polymerization. A kinetic model was proposed and adequate conditions for the synthesis by reactive extrusion were defined.

Corinne Jegat - One of the best experts on this subject based on the ideXlab platform.

  • thermally reversible crosslinked polyethylene using diels alder reaction in Molten State
    Reactive & Functional Polymers, 2010
    Co-Authors: Sylvain Magana, Amar Zerroukhi, Corinne Jegat, Nathalie Mignard
    Abstract:

    Abstract Thermally reversible crosslinked polyethylene was prepared by Diels–Alder (DA) and retro Diels–Alder (rDA) reaction. Maleimide/furan adduct was used as crosslinking agent. Dienophile named 11-maleimido-undecanoic acid was first synthesized and between this dienophile and commercial 3-(2-furyl) propanoic acid, the DA reaction was studied to determine DA and rDA reactions temperatures in the solid State. Then, an original modification method was employed to graft the two molecules onto the Lotader® poly(ethylene-co-glycidyl methacrylate) in one step procedure. The DA and rDA reactions between diene and dienophile grafted moieties are followed by FT-IR analysis on a thin film. Readily polymer network is synthesized and the cycle of DA and retro-DA reactions is repeatable with no significant polymer degradation.

Fawaz Deri - One of the best experts on this subject based on the ideXlab platform.

  • Melt Rheology of Poly(Lactic Acid)/Low Density Polyethylene Polymer Blends
    Advances in Chemical Engineering and Science, 2011
    Co-Authors: Kotiba Hamad, Mosab Kaseem, Fawaz Deri
    Abstract:

    In this work, rheological properties of poly (lactic acid) (PLA), low density polyethylene (LDPE) polymer blends were investigated in the Molten State. The experiments were carried on a capillary rheometer. The effect of shear stress, temperature and blending ratio on the flow activation energy at a constant shear stress and melt viscosity of the blends are described. The results showed that the PLA/LDPE polymer blends are pseudo plastic in nature, where there viscosity decreases with increasing shear stress. Also it was found the melt viscosity of the blends decreases with increasing PLA content in the blend