热处理对照相明胶溶液粘度和分子量分布的影响  

THE EFFECT OF HEAT TREATMENT ON THE VISCOSITY AND THE MOLECULAE WEIGHT DISTRIBUTION OF PHOTOGRAPHIC GELATINS

作　　者：傅延勋[1] 阎天堂[1] 饶秀芝 

机构地区：[1]中国科学技术大学化学物理系

出　　处：《感光科学与光化学》1996年第1期14-19,共6页Photographic Science and Photochemistry

基　　金：国家自然科学基金

摘　　要：本文以四种照相明胶为研究对象，探讨热处理对照相明胶溶液粘度和分子量分布的影响．实验结果表明，随着加热温度上升，照相明胶溶液粘度下降，数均分子量下降。照相明胶溶液粘度和数均分子量密切相关，照相明胶溶液粘度下降发生的内在原因是数均分子量下降。在本实验条件下，惰胶、活性胶的加热温度不超过７５℃，ＰＡ胶的加热温度不超过６０℃。Thepaper presents a study on the effect of heat treatment on the viscosity and the molecular weight distribtuon of the four photographic gelatins.The experimental results indicate that the viscosity and the number average molecular weight of photographic gelatins are decreased when the heating temperature is increased.The viscosity and the number average molecular weight of photographic gelatins are closely related.Caused by decreasing of the number average molecular weight,the viscosity of photographic gelatins is decreased.Under our experimental condition,the critical heating temperature of inert gelatin and active gelatin is proposed less than 75℃ and less than 60℃ respectively for modified gelatin.

关 键 词：明胶 粘度 分子量分布 热处理 照相胶 

分 类 号：TQ572.22[化学工程—精细化工]