Preparation and characterization of acrylic resin/protein composite crosslinked films / X. H. Qiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 923-931 Titre : Preparation and characterization of acrylic resin/protein composite crosslinked films Type de document : texte imprimé Auteurs : X. H. Qiang, Auteur ; Q. Xue, Auteur ; H. Zhang, Auteur ; Z. Yan, Auteur ; M. Li, Auteur ; W. Xu, Auteur ; Y. J. Wang, Auteur Année de publication : 2014 Article en page(s) : p. 923-931 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages. Couches minces Polyacryliques Protéines Revêtements -- Propriétés chimiques:Peinture -- Propriétés chimiques Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Traction (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : A series of ambient self-crosslinkable acrylic resin/protein composite emulsions (PA–Ps) were prepared by copolymerizing the functional monomer acetyl acetylethyl methacrylate (AAEM) with methyl acrylate, butyl acrylate and acrylic acid, and then protein crosslinking agents such as gelatin and casein were also added. The PA–P films were characterized by Fourier transform IR spectroscopy, contact angles, differential scanning calorimeter, thermogravimetric analysis, antisolvent testing and physicomechanical testing. Influences of AAEM and protein dosages on properties of composite films were examined in detail. The results indicate that influences of AAEM and protein on PA–P films are diverse on solvent resistance, physicomechanical properties and thermal properties. With enhancement of AAEM and protein dosages, hardness, solvent resistance to tetrahydrofuran and glass transition temperature (Tg) of PA–P films are markedly enhanced, but the decomposing temperatures (Td) are decreased. Tensile strengths are evidently reinforced while elongations at break are lessened. Suitable AAEM and protein dosages could render PA–P films with good water resistance. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of acrylic resin/protein composite crosslinked films - Characterization and performance tests of acrylic resin/protein composite films - RESULTS AND DISCUSSIONS : Mechanism ans characterization of crosslinking - Hardness, appearance and tackiness of the film - Water absorption rate - Solvent resistance - Mechanical properties - Thermal properties of the prepared films DOI : 10.1007/s11998-014-9599-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9599-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22315 [article]

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Study on creep behavior of PP/CaCO3 molded by vibration injection molding at different vibration frequency and vibration pressure / Y. Lu in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 2 (05/2011)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 2 (05/2011) . - p. 136-142 Titre : Study on creep behavior of PP/CaCO3 molded by vibration injection molding at different vibration frequency and vibration pressure Type de document : texte imprimé Auteurs : Y. Lu, Auteur ; H. Peng, Auteur ; K. Shen, Auteur ; Z. Yan, Auteur Année de publication : 2011 Article en page(s) : p. 136-142 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole. C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots. Composites -- Fluage Contraintes (mécanique) Matières plastiques -- Moulage par injection Polypropylène Rupture (mécanique) Vibrations (mécanique) Index. décimale : 668.9 Polymères Résumé : Vibration injection molding technology has achieved some good properties, such as high impact strength and high tensile strength. Although many researchers have proved that the short-time mechanical properties of the polymer could be improved by vibration-injection molding technology, the longtime mechanical properties, such as the creep behavior, have not been paid enough attention. In this paper, the creep behavior of the calcium carbonate filled polypropylene (PP/CaCO3) prepared at various vibration conditions has been observed. The influences of the vibration pressure and the frequency on the mechanical properties and creep behavior were investigated via creep test and tensile test. Firstly, the tensile fracture strain reached the maximum (11%) at 0.72 Hz. Moreover, with the increasing vibration pressure amplitude, the tensile fracture strain would decrease. The changing tendency of tensile strength is basically contrary with the change of the tensile fracture strain. Secondly, when the vibration frequency reaches the 0.72 Hz, the tensile creep is larger than that of other frequencies samples at 50 MPa; meanwhile, the tensile creep of these PP/CaCO3parts, which has been prepared at 0.48 Hz, decreases with the increasing vibration pressure amplitude. Finally, the dynamic mechanics analysis (DMA) and the wide-angle X-ray diffraction (WAXD) were adopted to analyze the reason of the creep behavior change. The different macromolecular chains mobility caused the different creep behavior. DOI : 10.3139/217.2379 En ligne : https://drive.google.com/file/d/1IqN-eJeH2DbVsQzRmNS9b2WiOBglMjxx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11514 [article]

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