| Autor: |
Yoshio Kabata, Tomohiro Kawai, Akio Nakanishi, Tohru Setoyama, Tooru Ookoshi, Hiroshi Takeo, Mitsuharu Kobayashi, Izumi Ono |
| Rok vydání: |
2003 |
| Předmět: |
|
| DOI: |
10.1016/s0167-2991(03)80249-5 |
| Popis: |
Polymerization of tetrahydrofuran (THF) catalyzed by solid acid in the presence of acetic anhydride was studied. A moderate Lewis acid catalyst produced PTME (PTMG-diacetate) having appropriate molecular number (Mn). Zeolites were not suitable for this reaction because they produced PTME having very large Mn together. On the contrary, mixed oxide materials showed good performance. Py-IR result suggested that the acidic characters had an important role to control Mn. Mass transfer study suggested the importance of pore size of support and the homogeneity of active sites. They affected on the Mn and the polydispersity (Mw/Mn) strikingly. The commercial technology has been established by utilizing these results. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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