Laboratory-scale composting test methods to determine polymer biodegradability: model studies on cellulose acetate.

摘要: Abstract Studies have been conducted to determine the time dependence of film normalized weight loss using in-laboratory simulations a compost environment. The composting bioreactors contained fresh synthetic waste mixture formulation which was maintained at 53°C and 60% moisture. An important result from these studies is that cellulose acetate (CA) films (approximate thickness between 0.025 0.051 mm) with degrees substitution (DS) 1.7 2.5 appeared completely disintegrated after 7 18 day exposure periods, respectively. Little noted under similar temperature moisture conditions abiotic controls. testing protocol developed provided repeatable results on measurements. used polymer investigated using, primarily, CA DS-1.7 as substrate. It found virtually unchan...