In order to develop a noble evaluation method for biodegradabili ty of polymeric materials,Various biode-gradable polymers have been characterized mainly by using pyrolysis-gas chromatography (Py-GC)and matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS).First,the degree of biodegradation of poly-(butylene succinate-co-butylene adipate)(PBSA) film samples during the soil burial degradation test was evaluated by Py-GC.This technique was further applied to evaluate the compositional change of biodegradable polymer blends during enzymatic degradation test.On the other hand,enzymatic degradation behavior of a biodegradablepolyester with a controlled terminal structure was monitored by MALDI-MS mainly focused on the changes in molecular weight distriution and terminal struture.Finally,biodegradation intermediates of noniconic surfactant were characterized by MALDI-MS.By using ~18O-labelled water as an incubation medium, detailed biodegaradation mechanisms of the surfactant were proposed.
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Institute for Environmental Management Technology,National Institute of Advanced Industrial Science and Technology (AIST) (16-1 Onogawa,Tsukuba, Ibaraki 305-8569,Japan);
