アセチルセルロースの研究
書誌事項
- タイトル別名
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- Study on Acetylcellulose
- 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
抄録
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.
収録刊行物
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- 高分子化學
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高分子化學 26 (291), 485-490, 1969
公益社団法人 高分子学会
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詳細情報 詳細情報について
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- CRID
- 1390001206520132736
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- NII論文ID
- 130004032808
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- ISSN
- 18848079
- 00232556
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可