@article{oai:toyama.repo.nii.ac.jp:00003821, author = {浅岡, 忠知 and 可部谷, 哲治 and 作道, 栄一}, issue = {1/2}, journal = {富山大学工学部紀要}, month = {Mar}, note = {Our studies on the viscosity of macromolecular polysaccharides such as plant gum or plant mucilage relating to the industrial utilization of polyphosphates are interesting. Following these studies for gum tragacanth and C.M.C., now the similar studis for locust bean mucilage (gum), also known as carob bean gum were carried out using Stormer type rotational viscosimeter. Furthermore, instead of the previous measurements on the viscosity of ca. 3% aqueous solution with the viscosimeter of the falling ball type, the present measurements on that of ca. 1.5% aqueous gum tragacanth solution with rotational viscosimeter are also canied out. The results obtained may be summarized in the following: (I) Effects of 5 sorts of polyphosphates such as sodium pyrophosphate, sodium tripoly phosphate, sodium hexametaphosphate and their mixtures on the about 1.0--1.5% aqueous solution of locust bean gum as one of plant mucilage and on the about 3% aqueous solution of gum tragacanth as one of plant gum are studied and the considerable increase of their viscosity are observed. (II) In both cases, each curve relating the viscosity-quantities added has maximum and the orders for the increassing effect with these polyphosphates resembled each other. (III) It appears that this increasing of the viscosity will be partly ascribed to the increased formation of aggregation of the linear negative ions and may be partly based on the untwisting of somewhat kinked linear macromolecule having many hydroxyl groups probably caused by the adsorption of these polyphosphate ions kindred with that group., 浅岡が従来行って来ている重合燐酸塩の利用に関連した多くの研究のうちで発表済のものは若千に過ぎない。 しかしその中に高分子物質水溶液の粘度に対する添加物の影響の研究としてトラガントゴム水溶液についての報告があるので,ゴム類ではないが或意味ではこれと類似とも云える植物粘質物であるローカストゴムについて同様の実験を行ったものである。 このローカストゴムは食品,化粧品,繊維加工,製紙,医薬用ゼリーなどの方面の用途が知られているので,これに対する添加物効果はその利用面からも主要である。 更に既報ではトラガントゴム水溶液の粘度測定が落球式であったので,今回はローカストゴム水溶液と同じく回転粘度計によって測定可能の粘度まで低下させるために,前の約半分の濃度である約3%にして同種の実験を行ったものである。, Article, 富山大学工学部紀要,13(1/2)}, pages = {79--84}, title = {ローカストゴムおよびトラガントゴム水溶液の粘度に対する各種燐酸塩の添加効果について}, volume = {13}, year = {1962} }