Study on Acetylcellulose
-
- Takahashi Akira
- Department of Industrial Chemistry, Faculty of Engineering. Kogakuin University
-
- Takahashi Shiro
- Department of Industrial Chemistry, Faculty of Engineering. Kogakuin University
Bibliographic Information
- Other Title
-
- アセチルセルロースの研究
- Sulfamic Acid, Ammonium Sulfamate, Hydroxylamine Sulfate as Catalyst of Acetylation
- アセチル化触媒としてのスルファミン酸, スルファミン酸アンモン, 硫酸ヒドロキシルアミンについて
Abstract
Cotton linter is immersed in acetic acid aqueous solutions (1: 1 vol.) of sulfamic acid (SA), ammonium sulfamate (AS), hydroxylamine sulfate (HS). The excess imbibitionacid is removed by suction and then the cellulose is acetylated with a mixture of acetic anhydride and diluent at 50-100°C.<BR>Under appropriate conditions, cotton linter impregnated with the catalyst is acetylated smoothly; for example, triacetyl cellulose can be obtained in the acetylation by acetic anhydride at 70°C for 2-5 minutes. The catalytic effectiveness of these compounds is as follows;HS≥SA>AS<BR>The acetylation reaction is accelerated by the addition of the diluents which have only a little affinity to these catalysts, since the dissolution of the catalysts into the acetylating bath is prevented.<BR>Effectiveness of the catalysts and the diluents to obtain the acetate with high degree of polymerization is as follows;HS>SA=AS, CH2Cl2+C2H5OH>none>C6H6≥CH3COOH.
Journal
-
- Kobunshi Kagaku
-
Kobunshi Kagaku 26 (291), 485-490, 1969
The Society of Polymer Science, Japan
- Tweet
Details 詳細情報について
-
- CRID
- 1390001206520132736
-
- NII Article ID
- 130004032808
-
- ISSN
- 18848079
- 00232556
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed