[article]
| Titre : |
Analyzing polymer properties : A monitoring system continuously analyzes polymer properties during production and in real time |
| Type de document : |
texte imprimé |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 24-27 |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésifs sensibles à la pression
Essais d'adhésion
Essais de pelage
Polymères -- Analyse
Polymères -- Propriétés
Tack
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Pressure-sensitive adhesives (PSAs), which date back to the 1920s, are critical to the medical, engineering and construction industries. Demand for PSA tape in 2017 was 39.2 billion sq m4 and was expected to rise to 50 billion sq m by the end of 2018. PSA manufacturers continue research efforts to invent novel materials that are required to meet both customer demand and new applications.
The application quality of a PSA is determined by three main properties : tack, peel strength (adhesion) and shear strength (cohesion).1-2 Various blends of reactant monomers such as acrylic acid and 2-ethylhexyl acrylate (2EHA) have been introduced into reaction systems to tailor the physical properties of PSAs. The results of these chemistry and reactant changes are observed in the reaction kinetics, molecular weight (Mw), and intrinsic viscosity (IV), which vary by formulation. Conventional, off-line analysis on an end product makes manufacturing and QC complicated and time consuming, with a lack of systematic consistency. Introducing continuous, online monitoring of these characteristics leads to better quality and reaction process optimization, improving the R&D cycle and increasing manufacturing efficiency.
An online monitoring system has been developed that continuously analyzes polymer properties during production and in real time. The system uses a well-known, non-chromatographic method to measure monomer and polymer concentration, intrinsic viscosity, and weight average molecular weight. Its automation and analysis software handles data acquisition, analysis, and reporting in real time. |
| Note de contenu : |
- Fig. 1 : ACM RI data for 2EHA monomer and poly2EHA
- Fig. 2 : UV spectra of 2EHA, acrylic acid and poly2EHA
- Fig. 3 : Raw UV, viscosity and SLS signals of homopolymer 2EHA batch polymerization
- Fig. 4 : Raw UV, viscosity and SLS data from copolymer 2EHA and AA batch polymerization
- Fig. 5 : Polymer concentration at UV detector
- Fig. 6 : Intrinsic viscosity vs. polymer concentration
- Fig. 7 : Molecular weight vs. polymer concentration
- Table 1 : Reaction conditions for each polymerization
- Table 2 : Online monitoring results of intrinsic viscosity and molecular weight
- Table 3 : GPC analysis results |
| En ligne : |
https://www.adhesivesmag.com/articles/96938-analyzing-polymer-properties |
| Format de la ressource électronique : |
Html |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32619 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 26, N° 5 (05/2019) . - p. 24-27
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Ajouter le résultat dans votre panierDesigning adhesives for long-wear skin contact applications / Michael Krejsa in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 26, N° 5 (05/2019)
