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Commercial degradable polyurethane-based

Commercial degradable polyurethane-based anti-inflammatory/anticancer drug delivery systems... [Pg.88]

The chemical resistance of many TPEs is poor compared to that of conventional mbbers. Polyurethanes, copolyesters, and copolyamldes are very susceptible to oxidation, especially at elevated temperatures. Antioxidants and other additives are added to commercial products to improve the chemical resistance of these materials. Carbon black can be added to improve stability to UV light if the color of the material is unimportant. Hydrolytic stability is poor for the polyester-based polyurethanes and the copolyamldes because the ester linkage can be attacked by water. For all TPEs, certain organic solvents can degrade these materials if one or both of the blocks will dissolve in the particular solvent. The resistance to many common oils and greases is high for the more polar TPEs. [Pg.623]

See other pages where Commercial degradable polyurethane-based is mentioned: [Pg.833]    [Pg.834]    [Pg.136]    [Pg.635]    [Pg.635]    [Pg.490]    [Pg.138]    [Pg.767]    [Pg.517]    [Pg.180]    [Pg.1186]    [Pg.306]    [Pg.214]    [Pg.155]    [Pg.506]    [Pg.7]    [Pg.189]    [Pg.2683]    [Pg.636]    [Pg.529]    [Pg.42]    [Pg.636]    [Pg.89]    [Pg.490]   


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