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Padma L. Nayak – One of the best experts on this subject based on the ideXlab platform.

  • Synthetic Resins. X. Resin copolymers from hydroxy phenacyl bromide, substituted benzoic acid/formaldehyde
    Journal of Applied Polymer Science, 2003
    Co-Authors: Pramod K Nayak, Subasini Lenka, Padma L. Nayak
    Abstract:

    A number of Resin copolymers have been synthesized by condensing p-hydroxy phenacyl brombromide, substituted benzoic acids, and formaldehyde catalyzed by acids. The Resin copolymers were characterized by IR spectra. The solution, thermal and chemical properties of the Resins have been investigated. Ion exchange selectivity with respect to Cu 2+ and Co 2+ has been studied at different pH. Bacteriocidal and fungicidal properties of the Resins have also been evaluated

  • synthetic Resins x Resin copolymers from hydroxy phenacyl bromide substituted benzoic acid formaldehyde
    Journal of Applied Polymer Science, 1990
    Co-Authors: Pramod K Nayak, Subasini Lenka, Padma L. Nayak
    Abstract:

    A number of Resin copolymers have been synthesized by condensing p-hydroxy phenacyl brombromide, substituted benzoic acids, and formaldehyde catalyzed by acids. The Resin copolymers were characterized by IR spectra. The solution, thermal and chemical properties of the Resins have been investigated. Ion exchange selectivity with respect to Cu 2+ and Co 2+ has been studied at different pH. Bacteriocidal and fungicidal properties of the Resins have also been evaluated

Henri Cramail – One of the best experts on this subject based on the ideXlab platform.

  • Epoxidized rosin acids as co-precursors for epoxy Resins
    Designed Monomers and Polymers, 2014
    Co-Authors: Anne-laure Brocas, Audrey Llevot, Christos Mantzaridis, Gabriel Cendejas Santana, Rémi Auvergne, Sylvain Caillol, Stéphane Carlotti, Henri Cramail
    Abstract:

    A series of novel epoxy Resins were prepared from chemically modified rosin, mainly constituted of abietic acid, diglycidyl ether of bisphenol-A (DGEBA) in different percentages as co-reactants, and isophorone diamine as cross-linking agent. Reactive epoxide groups were introduced in the structure of this common pine tree derivative. The chemical structures of various epoxidized rosin acids precursors were confirmed by NMR spectroscopy. Differential scanning calorimetry and dynamic mechanical analysis were used to determine the glass transition temperature and the elastic modulus of the cured epoxy Resins. Relatively rigid materials with thermo-mechanical properties depending on the structure of rosin acid derivatives and their ratios with DGEBA were obtained. Epoxy precursors based on renewable rosin can be efficiently used as co-additives of DGEBA for epoxy products.

  • Rosin acid oligomers as precursors of DGEBA-free epoxy Resins
    Green Chemistry, 2013
    Co-Authors: Christos Mantzaridis, Anne-laure Brocas, Audrey Llevot, Rémi Auvergne, Sylvain Caillol, Stéphane Carlotti, Gabriel Cendejas, Henri Cramail
    Abstract:

    Rosin acid oligomers were modified and utilized in order to prepare thermosets based on epoxy Resins. Epoxide groups were incorporated into this acidic precursor by various synthetic strategies and the corresponding thermosets were obtained thanks to an amino curing agent. Endocyclic epoxidized materials were firstly prepared and used as an additive to diglycidyl ether of bisphenol A (DGEBA) in the presence of isophorone diamine. In a second approach, glycidyl esters of rosin acid oligomers were synthesized and thus utilized for the preparation of DGEBA-free thermosets. Some thermo-mechanical properties of the resulting epoxy Resins were explored by DSC and DMA analytical techniques

Pramod K Nayak – One of the best experts on this subject based on the ideXlab platform.

  • Synthetic Resins. X. Resin copolymers from hydroxy phenacyl bromide, substituted benzoic acid/formaldehyde
    Journal of Applied Polymer Science, 2003
    Co-Authors: Pramod K Nayak, Subasini Lenka, Padma L. Nayak
    Abstract:

    A number of Resin copolymers have been synthesized by condensing p-hydroxy phenacyl bromide, substituted benzoic acids, and formaldehyde catalyzed by acids. The Resin copolymers were characterized by IR spectra. The solution, thermal and chemical properties of the Resins have been investigated. Ion exchange selectivity with respect to Cu 2+ and Co 2+ has been studied at different pH. Bacteriocidal and fungicidal properties of the Resins have also been evaluated

  • synthetic Resins x Resin copolymers from hydroxy phenacyl bromide substituted benzoic acid formaldehyde
    Journal of Applied Polymer Science, 1990
    Co-Authors: Pramod K Nayak, Subasini Lenka, Padma L. Nayak
    Abstract:

    A number of Resin copolymers have been synthesized by condensing p-hydroxy phenacyl bromide, substituted benzoic acids, and formaldehyde catalyzed by acids. The Resin copolymers were characterized by IR spectra. The solution, thermal and chemical properties of the Resins have been investigated. Ion exchange selectivity with respect to Cu 2+ and Co 2+ has been studied at different pH. Bacteriocidal and fungicidal properties of the Resins have also been evaluated