Graft Polymerization of Butylacrylate onto Cellulose Fabrics in the Absence of an Initiator

Butylacrylate의 셀룰로오스 섬유에의 무촉매 Graft 중합 -제1보 Dioxane-물 混合용매중에서의 Graft 중합-

Graft polymerization of B. A. onto cellulose fabrics have been carried out in the mixed solution of dioxane and water in the absence of an initiator under nitrogen atmosphere. Some factors influencing the grafting have been studied and the properties of B.A. grafted rayon fabrics have been also observed, The results of this study are: B.A. is grafted onto rayon without difficult and weight increase attains up to 40%, but difficulty onto ramie and rarely onto cotton. Pre-treating with acidic solution promotes efficiency of grafting and the most favorite concentration is found to be 0.02-N HNO₃. The existence of water is an important factor for graft polymerization and the weight increase proportionally related with the amount of water in polymerization medium. The amount of grafting increases with increasing concentration of B.A. up to it's critical solubility in dioxance-water solvent. The weight increase is roughly proportional to reaction time at early stage, and becomes equilibrium over 8 hrs. for rayon and 4 hrs. for ramie. A little amount of homopolymer is produced with rayon, while large amount of homopolymer is produced with ramie at temperature over 60℃. It suggests that ramie has some factor initiate addition polymerizatin. The moisture regain of grafted rayon is decreased and the tensile stregth, elongation at break and abrasion resistance are increased with increasing weight gain.