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The reaction of fibrous cotton cellulose with o- or p-chlorophenylcarbanilates (o- or p-CPCA)(isocyanate generators) has been studied in order to obtain the cellulose carbanilate c ontaining high nitrogen.<BR>The reaction was carried out by heating a cotton linter with o- or p-CPCA dissolved in N, N-dimethylformamide (DMF) at 120°C for 10 hr under nitrogen atmosphere. The product containing the highest nitrogen (5.5%) was obtained from the reaction mixture of cotton linter, DMF and o-CPCA in wt. ratio 1.00: 40.6: 27.4 (6 times of the amount required for tricarbanilation) respectively. The product containing the highest nitrogen (5.3%) was obtained from the mixture of cotton linter, DMF and p-CPCA in wt. ratio 1.00: 60.9: 13.7 (3 times of the amount required for tricarbanilation) respectively. Under the same reaction condition, o-CPCA is more reactive than p-CPCA. This may be due to the fact that o-CPCA generates isocyanate more easily than p-CPCA.<BR>The amount of residual cellulose I crystal in various cellulose carbanilates was measured by X-ray diffractin method.<BR>The results showe d that the reaction of cotton. cellulose with CPCA is heterogeneous which Proceeds from amorphous to crystalline region in cellulose fiber.
- 公益社団法人 日本化学会の論文
公益社団法人 日本化学会 | 論文
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