| Titre : |
Nanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts |
| Type de document : |
texte imprimé |
| Auteurs : |
Ravi G. Joshi, Auteur ; Frank N. Jones, Auteur ; Theodore Provder, Auteur ; Weidian Shen, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 1481-1500 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Coalescence (Sciences physiques)
Formation de film
Latex
Microémulsions
Morphologie (matériaux)
Nanoparticules
Polyacryliques
Polymères -- Synthèse
Polymérisation en émulsion
Réticulation (polymérisation)
Revêtements organiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
For this study, functional precoalescence (internally crosslinked) and postcoalescence (crosslinkable) conventional latexes were made using seeded semi-continuous emulsion polymerization. Nanosize polymer latexes with or without crosslinkable functional groups were made using a modified microemulsion copolymerization process. Films cast from conventional and nanosize latex were characterized using specific end use tests and fundamental properties using dynamic mechanical analysis, modulated differential scanning calorimetry, and atomic force microscopy. This study compares conventional and nanosize latex with respect to the effect of the type and level of crosslinking, particle size and distribution on latex film formation and morphology, and end use and fundamental properties. Nanosize latex films in general have superior gloss, solvent resistance, and adhesion but inferior water resistance. Stress–strain Young’s modulus showed an increase as a function of increasing crosslinker level in the nanosize latex films. |
| Note de contenu : |
- EXPERIMENTAL : Preparation of nanoparticle latexes using improved modified microemulsion copolymerization - Materials - Preparation of conventional size precoalescence or postcoalescence crosslinked conventional latexes
- CHARACTERIZATION OF LATEXES : Latex properties - Film properties of conventional latexes and nanoparticle latexes - Thermal and mechanical properties of conventional latexes and nanoparticle latexes - Measurements with AFM of conventional latexes and nanoparticle latexes
- RESULTS AND DISCUSSIONS : Nanosize latex synthesis and characterization - Film formation by “precoalescence” and “postcoalescence” crosslinked latexes - Gel content results - End-use film properties - Fundamental mechanical properties - Stress–strain analysis of constituent nanosize latexes with precoalescence and postcoalescence crosslinking and comparisons with their conventional size counterparts - Dynamic mechanical properties
- Table 1 : Composition table for nanosize latexes (with or without functional group)
- Table 2 : Characteristics of conventional (with or without crosslinker) latexes
- Table 3 : Characteristics of nanosize (with or without crosslinker) latexes
- Table 4 : End-use properties of films cast from conventional latexes
- Table 5 : End-use properties of films cast from nanosize latexes AFM results
- Table 6 : Comparison of surface smoothness and gloss values of nanoparticle latexes and their conventional counter parts
- Table 7 : Results of stress–strain analysis of nanosize latexes
- Table 8 : Results of stress–strain analysis of conventional size latexes
- Table 9 : Comparison of DMA values with MDSC Tg values of conventionally size precoalescence or postcoalescence crosslinked latexes
- Table 10 : Comparison of DMA values with MDSC Tg values of nanosize precoalescence or postcoalescence crosslinked latexes |
| DOI : |
https://doi.org/10.1007/s11998-021-00475-z |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00475-z.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36803 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1481-1500
Aller sur edunet
Accueil
Nanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
