Reaction of Cellulose with 2, 4-Diisocyanatotoluene in N, N-Dimethylformamide

Abstract

The reaction of fibrous cotton cellulose with 2, 4-diisocyanatotoluene (2, 4-DIT) has been studied to obtain the addition product of high nitrogen content.
Studies to elucidate the structure of the crosslinking, formed a mong the cellulose molecular chains, were also made. (DMF) reaction was carried out by heating a cotton linter with a N, N-dimethylformamide solution of 2, 4-DIT under nitrogen atmosphere.
The addition product of the highest nitrogen content (2.8 %) was obtained by heating a cotton linter (1.00 g) with 2, 4-DIT (9.66g, viz., 6 times of the theoretical amount) dissolved in DMF (50.0 ml) at 125°C for 2 hr unde r nitrogen atomosphere. The cry s tallininity of residual cellulose I, the insolubility due to ethylendiaminecopper(II)complex solution, and the infrared spectrum of the products were recorded in the course o f theT hteaction to make clear the structure of the addition reaction products.
e results showed that 2, 4-DIT is corosslinked by urethane bonds among the am orphous or the quasi-crystalline cellulose molertiarr chains.