Polypropylenimine dendrimers: Improved synthesis and characterization

Autor: J. Keulen, S. van der Wal, Rolf Scherrenberg, J. Brackman, Betty Coussens, M. Hogeweg, E. M. M. De Brabander, Ynze Mengerink, M. Mure‐Mak, H. De Man
Rok vydání: 1996
Předmět:
Zdroj: Macromolecular Symposia. 102:9-17
ISSN: 1022-1360
Popis: Both the Michael addition and the hydrogenation steps in the large scale synthesis of polypropylenimine dendrimers have been improved: by adding ammonia during the hydrogenations the substrate concentrations can be increased 8 times, the catalyst concentration can be lowered 10 times and the average selectivity remains > 99.5% per conversion. The dimensions of the dendrimers have been studied with SANS and with molecular calculations.
Databáze: OpenAIRE