𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fluorescence probes for monitoring polymerization processes

✍ Scribed by Z. Jeffrey Wang; J. C. Song; Rong Bao; D. C. Neckers

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
684 KB
Volume
34
Category
Article
ISSN
0887-6266

No coin nor oath required. For personal study only.

✦ Synopsis

Several intramolecular charge transfer fluorescence probes, such as the dansyl amides (lad), 4-dimethylamino-4'-nitrobiphenyl ( 2 ) and 4-(dicyanomethylene)-2-methyl-6-(p-di-methylaminostyry1)-4H-pyran (3), have been developed and evaluated. The fluorescence emission of the probes is sensitive to both the solvent polarity and medium microviscosity.

A spectral blue shift, attributed to an increase in microviscosity, was observed as polymerization proceeded. Therefore, these fluorescence probes can be used for monitoring polymerization processes. The correlation between the fluorescence emission intensity ratio and degree of cure is linear in various formulations, which may be cured either photochemically or thermally. The selectivity and sensitivity of the fluorescence probes have been investigated. 4-Dimethylamino-4'-nitrobiphenyl ( 2 ) was found to be the most sensitive probe to both solvent polarity and medium microviscosity.

📜 SIMILAR VOLUMES

ChemInform Abstract: Development of Fluo
ChemInform Abstract: Development of Fluorescence Probes Based on Stilbazolium Salts (I) for Monitoring Free Radical Polymerization Processes.
✍ Stanislaw Wroblewski; Katarzyna Trzebiatowska; Beata Jedrzejewska; Marek Pietrza 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 27 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

Wavelength-shift fluorescent probes for
Wavelength-shift fluorescent probes for monitoring of polymerization
✍ Francis W. Wang; Robert E. Lowry 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 69 KB 👁 1 views

## Abstract The feasibility of using wavelength‐shift fluorescent probes for cure monitoring of an epoxy resin and an acrylic resin was evaluated. 4‐(__N__,__N__‐dihexylaminostyryl)‐4′‐pyridinium propylsulfonate (DHASP‐PS), as well as each of other wavelength‐shift fluorescent probes, was dissolved

Fluorescence probes for investigation of
Fluorescence probes for investigation of epoxy systems and monitoring of crosslinking processes
✍ Bernd Strehmel; Veronika Strehmel; Malek Younes 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 313 KB 👁 2 views

The fluorescence behavior of 1,1Ј-dimethyl-2,2Ј-carbocyanine and p-N,Ndimethylamino-styryl-2-ethylpyridinium was investigated in several epoxy systems. Time-correlated single photon counting was used for all fluorescence measurements to obtain the rate constant for viscosity or mobility-dependent no