Degradation in an Aqueous Environment

This behaviour was attributed to the preferential paths that can be followed by enzymes, conferred by the hydrophilic character of the sodium modified montmorillonite compared with the BTA-copolyester [99]. 

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Deposit attack occurs when there is nonuniform deposition of a film on a metal surface. The most common form appears as unequal scale deposits in an aqueous environment. Unequal film provides for concentration cells, which degrade the metal by galvanic means. 

Wu et al. (2000) showed the formation of self-assembled nanoparticles of P(SA -block-EG) in an aqueous environment and studied their degradation as a function of pH and temperature. Fu et al. (2002) repeated the synthesis of P(SA-Wock-EG) and studied the morphology and erosion kinetics of microspheres which they propose as vehicles for mucosal drug delivery. 

ZaLESKA a, HuPKA ), WiERGOWSKI M, Bi-ziuK M (2000) Photocatalytic Degradation of Lindane, p,p -DDT and Methoxychlor in an Aqueous Environment, J. Photochem. Photobiol. A Chem. 135 213-2220. 

After exposure to and equilibration in an aqueous environment, polyesters degrade by hydrolysis that occurs homogeneously throughout the bulk of the... 

Virtually all polymeric materials, not just those designed to function in an aqueous environment, will be exposed to environmental water at some stage of their service lives, and water imbibition can have adverse effects on their physical and mechanical properties.Although the polymer itself may be able to tolerate such degradation, if water is absorbed at the interfaces of high moduli materials, substantial swelling pressures and the generation of unwanted stresses can be anticipated. Combined STRAFI and MRM studies of some commercial thermoset adhesives used in the construction industry have... 

Because urate is not very soluble in an aqueous environment and the concentration of urate in human blood is very close to saturation, conditions that lead to excessive degradation of purine bases can lead to the formation of urate crystals. 

The first poly(ortho ester) for biomedical applications was produced by Choi and Heller at Alza Corporation in the 1970s, and was given the trade name Alzamer . When placed in an aqueous environment, the polymer degrades to produce a diol and a lactone, which is rapidly converted into y-hydroxybutyric acid ... 

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