Year: 1978
Type: article
Abstract: Cyanoethyh tion of CellophaneThere have been many reports on cyanoethylation of macromolecular organic substances with reactive hydrogen atoms.These substances consist of a wide variety of polymer such as cotton,'3 starch: protein: pulp, and poly(viny1 a l c ~h o l ) .~~~ For the cyanoethylated cotton, it is said that the resistance to heat, acid damage, and microbiologic attack increases with extent of reaction and it was found that the dyeing properties can be improved.'Cyanoethylated cellulose has also been noted as a material with a high dielectric c o n ~t a n t .~J ~ Cyanoethylation of cellulose has been largely carried out in a heterogeneous reaction system as a fabric form, while only to a smaller extent in homogeneous systems.In this study, cyanoethylation of cellophane was conducted in a heterogeneous system by a one-step process in sodium hydroxide aqueous solution containing acrylonitrile, as a series of studies of chemical modification of polymeric films.The effects of the concentration of NaOH, acrylonitrile, wetting agent (sodium lauryl sulfate), and temperature on the conversion and the uniformity of reaction were investigated to determine the optimum condition for obtaining a partially cyanoethylated cellophane with retention of film form.The water-vapor transmission rate was measured as one of the changing properties of cellophane by cyanoethylation.The results will be discussed in correlation with solubility and crystallinity.
Authors: Takeo Hamaya, Sumio Yamada
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2009010787