𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Mass spectrometric analysis of polymers derived from N-aryl-α-amino acid initiators

✍ Scribed by Mahnaz Farahani; Joseph M. Antonucci; Curtis S. Phinney; Lisa R. Karam

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
146 KB
Volume
65
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Previous studies have demonstrated that the interaction of carboxylic acids with aryl amines produces free radicals that can initiate the polymerization of acrylic monomers. N-Aryl-a-amino acids (NAAA) represent a special class of this type of initiator that combines in one molecule the carboxylic acid and aryl amine functionalities necessary for the generation of radical species. The mechanism(s) of radical formation in these molecules is thought to involve both electron transfer and hydrogen abstraction reactions that can occur by intra-and intermolecular pathways. Acrylic monomers, i.e., methyl methacrylate (MMA) and 2-hydroxyethyl methacrylate (HEMA), were activated with various amounts of several NAAAs. Specific NAAAs investigated include N-phenylglycine (NPG) and N-p-tolylglycine (NTG). Polymerization was conducted at ambient or near ambient temperatures, and the polymers then were analyzed by electron impact mass spectrometry. Results indicate that these polymers have end groups derived directly from the NAAA initiators.

📜 SIMILAR VOLUMES

Piperidine ester derivatives in mass spe
Piperidine ester derivatives in mass spectrometric analysis of fatty acids from human serum phospholipids and cholesteryl esters
✍ Kirsi-Marja Marnela; Teemu Moilanen; Mirjami Jutila 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB 👁 1 views

When fatty acids with unknown structural features are confronted in mass spectral analyses of complex mixtures the cleavage pattern from the widely used methyl ester derivatives is not always sufficiently informative. Their mass spectra often contain only weak signals for the parent or any other cha