[PDF] Degradation mechanisms of bioresorbable polyesters Part

initial molecular weight for various hydrolysis mechanisms including noncatalytic random scission, autocatalytic random scission, noncatalytic end scission or

The polyesters were prepared by polycondensations of equimolar mixtures of diols and dicarboxylic acids without catalyst in molten state, up to the acid number of 45 ± 5 For the hydrolysis, hydrochloric acid or ^-toluenesulfonic acid was used as catalyst

[PDF] Alkaline Hydrolysis of Polyester Fibers - Iranian Polymer Journal

It is well known that the reaction between an aqueous solution of sodium hydroxide and polyester is a hydrolysis reaction and it takes place at the fiber surfaces

Hydrolysis of polyesters by serine proteases

The substrate specificity of a-chymotrypsin and other serine proteases, trypsin, elastase, proteinase K and subtilisin, towards hydrolysis of various polyesters was

[PDF] Condensation polymers - Pearson Schools and FE Colleges

In polyesters the ester link breaks; in polyamides the amide link breaks The diagram on the right shows the hydrolysis of PET Under basic conditions, the salt of

[PDF] Polymer Hydrolysis

Hydrolysis is a kind of “Solvolysis”, solvent + lysis: cleavage by Polymer Hydrolysis • Polymers 1 Bond stability Example: Hydrolysis of polyester C O

Hydrolysis of Polyesters by

hydrolysis of polyesters by Rh delemar lipase Poly(ethylene adipate) and polycaprolactone (PCL) were prepared by the method described previously})