@article{oai:swu.repo.nii.ac.jp:00002269,
 author = {小原, 奈津子 and 中山, 栄子 and 豊田, 春和 and KOHARA, Natsuko and NAKAYAMA, Eiko and TOYODA, Harukazu},
 journal = {昭和女子大学大学院生活機構研究科紀要, Bulletin of the Graduate School of Human Life Sciences, Showa Women's University},
 month = {Dec},
 note = {セルロースの劣化機構を解明することを最終目的として,アンダーグラス屋外暴露試験台を用いて3年5ケ月間,麻布を太陽光に暴露し,暴露期間の異なる麻布試料について酸化度(カルボキシル基,ケトン基およびアルデヒド基量),セルロースの重合度,結晶化度,微結晶粒の幅と長さおよび機械的性質を測定した。この結果,暴露初期では,カルボニル基,特に,アルデヒド基は著しく増加したが,その後減少することが明らかになった。一方,重合度および強度は,受光量の増加と共にほぼ単調に低下した。また,セルロースの微結晶粒の幅には明らかな変化は認められなかったが,長さは受光量の増加と共に減少していたことから,劣化反応は,繊維表面から内部へというよりむしろ,繊維軸に沿って進行していることが予想された。, In order to elucidate the mechanism of degradation of cellulosic fibers, linens have been exposed to sunlight on an underglass-exposure-rack for 3 years and 5 months and changes of their properties have been investigated as a function of incident sunlight energies. Carbonyl groups, especially aldehyde groups, increased remarkably in the samples after early exposure times, while carboxyl groups were not observed to increase. Degree of polymerization (D. P.) decreased with an increase in light energy and became less than 1/6 of the value of the unexposed control at the incident UV light energy of ca. 900 Mj/m^2. These facts suggest that degradative reactions including oxidation took place at glycosidic bonds as well as hydroxyl groups of cellulose to cause scission of the molecular chains. Their crystallite size of longitudinal dimension decreased markedly at first and then only slowly, while the size of their lateral dimension and crystallinity index remained almost unchanged. These results indicate that the degaradation did not proceed from the surface to the inner of the fibers, but proceeded longitudinally. The tensile strength monotonously decreased until ca. 4% of the value of the unexposed control., 5, KJ00004311052, 論文, Article},
 pages = {15--18},
 title = {太陽光による麻布の劣化},
 volume = {2},
 year = {1992},
 yomi = {コハラ, ナツコ and ナカヤマ, エイコ and トヨダ, ハルカズ}
}