Biodegradable copolymers with succinimide and lactic acid units.
Part II. Kinetics of thermodegradation, thermal characteristics
and zeta potential of the product (in English)
Polimery 2011, No 4, 302
Biodegradable copolymers based on succinimide and lactic acid units prepared by two synthesis routes (variants A and B described in Part I, see ) were characterized. Variant A consists in the in situ copolymer synthesis using maleic anhydride, ammonium hydroxide and L(+)-lactic acid and accordingly variant B previously prepared poly(succinimide) is modificated be means of L(+)-lactic acid by mass polycondensation procedure. A comparison of thermodegradation kinetics (TG, DTG), thermal properties (DSC, DTG) and zeta potential was compared for the products obtained through both procedures. Differences in the thermal properties of the copolymers — especially in the glass transition temperatures — were observed.