The effect of location of side chains in segmented poly(ester urethanes) on their hydrolytic and enzymatic degradation

被引：0
|
作者：
Stirna, U.K. [1 ]
Tupureina, V.V. [1 ]
Misane, M.M. [1 ]
Dzene, A.V. [1 ]
Sevast'yanova, I.V. [1 ]
机构：
[1] Latvian State Inst. of Wood Chem., Dzerbenes st. 27, Riga, LV 1006, Latvia
来源：
Vysokomolekularnye Soedineniya. Ser.A Ser.B Ser.C - Kratkie Soobshcheniya | 2002年 / 44卷 / 05期
关键词：
Alcohols - Conformations - Differential scanning calorimetry - Enzymes - Hydrolysis - Nuclear magnetic resonance spectroscopy - Polyesters - Reaction kinetics;
D O I：
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摘要：
Segmented poly(ester urethanes) were synthesized using poly(caprolactonediols) with Mn 1500 and 3500, hexamethylene diisocyanate, and bis(cyclohexylmethane)-4-isocyanate, as well as the mixtures of 2,4- and 2,6-toluylene diisocyanates and a chain extender. The effect of (C17H33COO-) side chains located at flexible, rigid, or both segments of poly(urethanes) on their structure, thermal properties, and hydrolytic stability was studied by DSC and NMR and IR spectroscopy. Films of poly(urethanes) containing side chains at flexible segments were shown to be more hydrophobic. Side chains attached to the flexible segment or both segments reduce the hydrolytic stability of films in a 10% solution of NaOH or under the action of Candida Rugoza lipase in a 0.1 N phosphate buffer solution. Side chains located at the rigid segment have an insignificant effect on the rate of degradation.
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页码：824 / 833
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