The Transitions among the Various Crystalline Modifications of Cellulose

Abstract

It may be of interest to summarize the possible transitions among the different crystalline m di cations f cellulose: 1, , 1, rr, 1V I and N n.
It is recognized that these modifications are classified into two families; cellulose 1 family (1, Iand NI)and cellulose family(, ll and N ll).
In cellulose I family, the transitions among I, I and NI are possible with eachother; the same is true for cellulQse family. Cellulose I family, however, can be transformed into cellulose, but the reverse is not true.
It is considered from these experiments that the chain conformations in cellulose 1 family and in cellulose family are different with eachother, and that the former and latter have bent and bent-twisted type cenformations, respectively.
It is newly recognized that cellulose N i can be tran formed into cellulose 1 by acid hydrolysis.