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: |
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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 |
Externí odkaz: |
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