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  • 2013-2022
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  • Kemija u Industriji

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  • Open Access Croatian
    Authors: 
    M. Majić Renjo; L. Ćurković;
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access Croatian
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access English
    Authors: 
    Marina Šekutor; Kata Mlinarić-Majerski;
    Country: Croatia

    Biološka aktivnost različitih adamantanskih derivata i njihova primjena opisane su u brojnim preglednim člancima. Isto tako, mnogi revijalni članci opisuju biološku aktivnost i primjenu gvanidinskih spojeva. Međutim, do sada nije načinjen pregled koji bi se bavio gvanidinskim derivatima adamantana i drugih policikla, tj. spojevima koji sadrže obje navedene podjedinice u istoj molekuli. U ovom radu bit će stoga dan pregled policikličkih derivata gvanidina, i to s naglaskom na njihovu primjenu kao potencijalnih farmakofora.

  • Open Access Croatian
    Authors: 
    Srećko Tomas;
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access Croatian
    Authors: 
    Sokol, Ivana;
    Country: Croatia
  • Open Access Croatian
    Authors: 
    Sanja Jurković;
    Country: Croatia
  • Publication . Other literature type . 2014
    Open Access Croatian
    Authors: 
    I. Kisić;
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access Croatian
    Authors: 
    Čatić, Igor; Salopek Weber, D;
    Country: Croatia
  • Publication . Other literature type . 2016
    Open Access Croatian
    Authors: 
    Jelena Macan;
    Country: Croatia

    Nekrolog prof. Ivana Esiha, stručnjaka u području korozije i zaštite materijala.

  • Open Access Croatian
    Authors: 
    Vlado Merzel; Sanja Lučić Blagojević; Zrinka Buhin Šturlić; Mario Meheš; Mirela Leskovac;
    Country: Croatia

    In this paper, the influence of flame treatment on the surface properties of polypropylene (PP) and thermoplastic polyolefins with talc and carbon black filler (TPO), and adhesion of the applied coating in the conditions of industrial robotic dyeing process were investigated. The flame treatment was carried out at two distances from the flame (7.5 cm and 12.5 cm) at constant air and methane flows as well as speed of the burner. The thermal stability of untreated samples was investigated using thermogravimetric analysis (TGA). The change in thermal properties before and after flame treatment was investigated using differential scanning calorimetry (DSC). Changes of the samples’ surface energy were examined before flame treatment, 1 h and 24 h after flame treatment, by the contact angle method. Qualitative analysis of the surface chemical composition, before and after flame treatment, was performed by ATR – FTIR analysis, and morphological changes by scanning electron microscopy (SEM). After applying the base layer, dye and topcoat on the surface of the treated samples, the adhesion was determined by standard methods ISO 2409 and ISO 16925/D25 2018-B. The results showed that TPO containing talc and carbon black filler have better thermal stability compared to PP. Flame treatment influenced the surface characteristics of the samples, namely the increase in surface free energy and the appearance/structure of the surface. With ATR – FTIR, the existence of polar groups on the surface after flame treatment were determined. According to the standards, all dyed samples met the requirements of excellent adhesion on the substrate/coating interface. This work is licensed under a Creative Commons Attribution 4.0 International License. U ovom radu istražen je utjecaj obrade plamenom polipropilena (PP) i termoplastičnih poliolefina s talkom i čađom (TPO) na površinska svojstva i adheziju nanesenog premaza u uvjetima industrijskog procesa robotskog bojenja. Obrada plamenom provedena je na dvije udaljenosti plamena od površine (7,5 cm i 12,5 cm) pri konstantnom protoku zraka i metana te brzini kretanja plamenika. Toplinska postojanost netretiranih uzoraka ispitana je primjenom termogravimetrijske analize (TGA). Promjena toplinskih svojstava prije i nakon obrade plamenom praćena je primjenom diferencijalne pretražne kalorimetrije (DSC). Metodom kontaktnog kuta određena je površinska energija uzoraka prije obrade plamenom te 1 h i 24 h nakon obrade plamenom. Promjene uzrokovane obradom plamenom istražene su ATR – FTIR analizom, a morfološke promjene pretražnim elektronskim mikroskopom (SEM). Nakon nanošenja temeljnog sloja, sloja boje i sloja laka na površinu obrađenih uzoraka određena je adhezija standardnim metodama ISO 2409 i ISO 16925/D25 2018-B. Rezultati su pokazali da TPO uzorci koji sadrže punilo talk i čađu imaju bolju toplinsku postojanost u odnosu na PP. Obrada plamenom utječe na promjenu površinskih karakteristika uzoraka, povećanje slobodne površinske energije i na izgled/strukturu površine. ATR – FTIR analizom utvrđeno je postojanje polarnih skupina na površini nakon obrade plamenom. Svi obojeni uzorci prema zahtjevima normi zadovoljavaju uvjete izvrsne adhezije na međupovršini supstrat/premaz. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna.

Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
1,470 Research products, page 1 of 147
  • Open Access Croatian
    Authors: 
    M. Majić Renjo; L. Ćurković;
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access Croatian
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access English
    Authors: 
    Marina Šekutor; Kata Mlinarić-Majerski;
    Country: Croatia

    Biološka aktivnost različitih adamantanskih derivata i njihova primjena opisane su u brojnim preglednim člancima. Isto tako, mnogi revijalni članci opisuju biološku aktivnost i primjenu gvanidinskih spojeva. Međutim, do sada nije načinjen pregled koji bi se bavio gvanidinskim derivatima adamantana i drugih policikla, tj. spojevima koji sadrže obje navedene podjedinice u istoj molekuli. U ovom radu bit će stoga dan pregled policikličkih derivata gvanidina, i to s naglaskom na njihovu primjenu kao potencijalnih farmakofora.

  • Open Access Croatian
    Authors: 
    Srećko Tomas;
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access Croatian
    Authors: 
    Sokol, Ivana;
    Country: Croatia
  • Open Access Croatian
    Authors: 
    Sanja Jurković;
    Country: Croatia
  • Publication . Other literature type . 2014
    Open Access Croatian
    Authors: 
    I. Kisić;
    Publisher: Croatian Society of Chemical Engineers
    Country: Croatia
  • Open Access Croatian
    Authors: 
    Čatić, Igor; Salopek Weber, D;
    Country: Croatia
  • Publication . Other literature type . 2016
    Open Access Croatian
    Authors: 
    Jelena Macan;
    Country: Croatia

    Nekrolog prof. Ivana Esiha, stručnjaka u području korozije i zaštite materijala.

  • Open Access Croatian
    Authors: 
    Vlado Merzel; Sanja Lučić Blagojević; Zrinka Buhin Šturlić; Mario Meheš; Mirela Leskovac;
    Country: Croatia

    In this paper, the influence of flame treatment on the surface properties of polypropylene (PP) and thermoplastic polyolefins with talc and carbon black filler (TPO), and adhesion of the applied coating in the conditions of industrial robotic dyeing process were investigated. The flame treatment was carried out at two distances from the flame (7.5 cm and 12.5 cm) at constant air and methane flows as well as speed of the burner. The thermal stability of untreated samples was investigated using thermogravimetric analysis (TGA). The change in thermal properties before and after flame treatment was investigated using differential scanning calorimetry (DSC). Changes of the samples’ surface energy were examined before flame treatment, 1 h and 24 h after flame treatment, by the contact angle method. Qualitative analysis of the surface chemical composition, before and after flame treatment, was performed by ATR – FTIR analysis, and morphological changes by scanning electron microscopy (SEM). After applying the base layer, dye and topcoat on the surface of the treated samples, the adhesion was determined by standard methods ISO 2409 and ISO 16925/D25 2018-B. The results showed that TPO containing talc and carbon black filler have better thermal stability compared to PP. Flame treatment influenced the surface characteristics of the samples, namely the increase in surface free energy and the appearance/structure of the surface. With ATR – FTIR, the existence of polar groups on the surface after flame treatment were determined. According to the standards, all dyed samples met the requirements of excellent adhesion on the substrate/coating interface. This work is licensed under a Creative Commons Attribution 4.0 International License. U ovom radu istražen je utjecaj obrade plamenom polipropilena (PP) i termoplastičnih poliolefina s talkom i čađom (TPO) na površinska svojstva i adheziju nanesenog premaza u uvjetima industrijskog procesa robotskog bojenja. Obrada plamenom provedena je na dvije udaljenosti plamena od površine (7,5 cm i 12,5 cm) pri konstantnom protoku zraka i metana te brzini kretanja plamenika. Toplinska postojanost netretiranih uzoraka ispitana je primjenom termogravimetrijske analize (TGA). Promjena toplinskih svojstava prije i nakon obrade plamenom praćena je primjenom diferencijalne pretražne kalorimetrije (DSC). Metodom kontaktnog kuta određena je površinska energija uzoraka prije obrade plamenom te 1 h i 24 h nakon obrade plamenom. Promjene uzrokovane obradom plamenom istražene su ATR – FTIR analizom, a morfološke promjene pretražnim elektronskim mikroskopom (SEM). Nakon nanošenja temeljnog sloja, sloja boje i sloja laka na površinu obrađenih uzoraka određena je adhezija standardnim metodama ISO 2409 i ISO 16925/D25 2018-B. Rezultati su pokazali da TPO uzorci koji sadrže punilo talk i čađu imaju bolju toplinsku postojanost u odnosu na PP. Obrada plamenom utječe na promjenu površinskih karakteristika uzoraka, povećanje slobodne površinske energije i na izgled/strukturu površine. ATR – FTIR analizom utvrđeno je postojanje polarnih skupina na površini nakon obrade plamenom. Svi obojeni uzorci prema zahtjevima normi zadovoljavaju uvjete izvrsne adhezije na međupovršini supstrat/premaz. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna.

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