ABSTRACT
Polypropyllactone (PPL) is very interesting polymers from a view point of biodegradable polymers. Y. Tokiwa and S. Komatsu reported the relation between aliphatic polyesters and biodegradability. The aliphatic polyesters were prepared from diols and dicarboxylic acids by using Ti(OR)4 as a catalyst. The enzymatic hydrolysis of resulting polyesters was carried out in a phosphate buffer solution at 30°C. H. Nishida and S. Suzuki reported distribution and identification of PPL degrading microorganisms, and field tests of films. The number of PPL degrading microorganisms in environments was estimated by counting colonies that formed clear zones on plates containing emulsified PPL. T. Imai reported an application of a biodegradable polymer, poly to telephone and railway cards. The cards were made of paper board coated with biodegradable polymers. H. Umeyama and M. Taniguchi investigated an application of BIONOLLE to bottles. Several physical properties and biodegradability of strech-blown BIONOLLE bottle were studied.
