The synthesis, characterization, hydrolysis and biodegradation of a copoly(ester amide), polyacryl-amide-co-(epsilon -caprolactone), are described. The hydrogen transfer copolymerization of acrylamide (AA),with epsilon -caprolactone (CLN) in the presence of butyllithium or calcium hydride as initiators has been investigated. The calcium hydride was effective for the synthesis of the copoly(ester amide) in a wide range of polymer composition (AA/CLN = 10:90 to 90:10). The copoly(ester amide) was readily hydrolyzed in the presence of hydroa. acid (0.1 N) at 125 degreesC in an autoclave (e.g. CLN = 59:41, degradation 93), Furthermore, the copoly(ester amide) was hydrolyzed enzymatically by from Rhizopus arrhizus. The behavior of the hydrolysis differed to the non-enzymatic hydrolysis enzymatic hydrolyzability was remarkable in the range of the AA repeating unit (beta -alanine unit) from 10 to 40 mol (e.g. AA/CLN = 27:73, degradation 44), while, the degradability for the non-enzymatic hydrolysis. The increasing AA repeating unit content. The biodegradation of the copoly(ester amide) was evaluated using a standard activated sludge (e.g. AA/CLN = 27:73 biodegradation 45). The relationship between the biodegradation and the polymer composition was similar fut the standard activated sludge and the enzymatic hydrolysis. References: 19
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