Structure of vinyl polysiloxane on properties of polyacrylates filmm and its pigment printing application / Qipeng Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 937-948 Titre : Structure of vinyl polysiloxane on properties of polyacrylates filmm and its pigment printing application Type de document : texte imprimé Auteurs : Qipeng Zhang, Auteur ; Minghua Wu, Auteur Année de publication : 2020 Article en page(s) : p. 937-948 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Caractérisation Copolymères -- Synthèse Copolymères greffés Couches minces -- Propriétés mécaniques Energie de surface Impression pigmentaire Impression sur étoffes Latex Liants Mesure Poids moléculaires Polyacrylates Polymérisation en émulsion Polyméthylvinylsiloxane Séparation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Polysiloxane is a promising modified material due to its good hydrophobicity and toughness, but it suffers from serious uneven distribution and migration during film formation process which gradually lead to the destruction of the hydrophobic structure. A novel silicon-modified copolymer with different molecular weight and vinyl content was synthesized to overcome this problem: an appropriate amount of double bonds between the polysiloxane backbone ensures uniform distribution. Moreover, a multicrosslinked network binder was prepared by miniemulsion polymerization of the polyacrylate copolymers and polysiloxane. Unlike the common crosslinked network of an uneven distribution and migration of silicone backbone, the polysiloxane with suitable crosslinking degree and molecular weight could be effectively distributed evenly during the film formation process. As a result, a better hydrophobicity and toughness performance (89.7° ± 0.5°, 2500% elongation at break) was achieved with this novel poly(methylvinylsiloxane) with 11,024 g/mol at 0.804 mmol/g vinyl content. The product was applied to pigment printing with better wet rubbing fastness and soft handle compared with the unmodified polyacrylates binder. The DSC, SAXS, and XPS indicated that high molecular organosilicon chain and moderate vinyl content were prone to phase separation and obviously shifted onto the surface of film, enriching a uniform organosilicon layer, which played a vital role in the surface hydrophobicity and mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of poly(methylvinylsiloxane - Polymerization - Pigment printing - Measurements - RESULTS AND DISCUSSION : Synthesis and structure of poly(methylvinylsiloxane) - Characterization of different latexes - Characterization of modified polyacrylate films - Degree of grafting of Vi-PDMS to polyacrylates - Microphase separation - Surface composition - Contact angles and surface energy - Mechanical properties of the films - Textile pigment printing applications DOI : https://doi.org/10.1007/s11998-020-00320-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00320-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34382 [article]

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