摘要
以醋酸纤维素(CA)为主要原料,采用相转变法制备醋酸纤维素水分散体(CAD).利用铸膜法制备水分散体游离膜,考察了增塑剂添加量、膜厚度对固化速率、游离膜表面特性、玻璃化转变温度Tg、力学性能、透湿性及洗脱率的影响.结果表明:由CA到醋酸纤维素水分散体游离膜的制备为物理过程,膜的厚度增加,透湿性减小.增塑剂添加量增大,固化速率和Tg均减小,透湿性、洗脱率和断裂伸长率均增大,弹性模量和拉伸强度先增大后减小,游离膜的表面越平整.
The aqueous cellulose acetate（CA）dispersion was prepared in phase inversion method in which cellulose acetate was used as main material.Casting film method was applied to prepare free films of aqueous dispersion.The influence of different plasticizer concentration and thickness of free films on Tg,mechanical properties,water vapor permeability and eluting ratio was studied.The results indicated that it was a physical process from CA to CAD free films preparation.The water vapor permeability of the membrane reduced with the increase of thickness.When the addition of plasticizer increasd,curing rate and Tg both decreased.The water vapor permeability,eluting ratio and elongation both increasd.Modulus and tensile increased at first then decreased.The surface of free films became smother with the increase of the addition of plasticizer.
出处
《天津科技大学学报》
CAS
2011年第6期43-47,共5页
Journal of Tianjin University of Science & Technology
基金
天津市滨海新区塘沽科技发展专项资金资助项目(2010CG11-03)
关键词
醋酸纤维素
游离膜
水分散体
cellulose acetate
free films
aqueous dispersion
