キチンに關する研究 : (第2報)溶液粘度より見たるグライコールキチンの分子形状及び分子重合度に就て

概要

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Following points were found from our experiments concerning the viscosity of the aqueous solution of glycol chitin. (1) The relation between the intrinsic viscosity, -[η], and the degree of polymerisation; P, for glycol chitin was found to agree with H. STAUDINGERs equation as follows: [η]=lim[ηspC]=Km•P C=0 Where η sp is for the specific viscosity; C for the concentration of the solution in grams per liter; and Km for a constant characteristic for each polymeric series. The value of Km for glycol chitin was 12×10-4 which was perfectly in agreement with that of water soluble cellulose derivatives such as glycol cellulose or methyl cellulose. Thus, it was concluded that chitin was similar to cellulose, a long chain molecule formed from β-1, 4-glu cosidic linkage of acetyl glucosamine. (2) The degree of polymerisation of glycol chitin was 851 which was calculated from the above equation, where Km is 12×10-4. Accordingly, it is sure that the degree of poly-merisation of natural chitin would be comparable to that of natural cellulose.
社団法人日本農芸化学会の論文