Effect of chemical structure on the biodegradation of polyurethanes under composting conditions

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Polyester-polyurethanes having different chemical structure were synthesized and their biodegradabilities were investigated. Average molecular weight of the synthesized polyurethanes ranged from 79 106 to 161 715 (M(w)) by gel permeation chromatography. Degradation experiments were conducted by: hydrolytic degradation in NaOH solution; enzymatic degradation by lipase; and composting. Hydrolytic and enzymatic degradation decreased with the increase of the diol carbon chains in polyol, and increased by substituting aromatic diisocyanate with aliphatic diisocyante. It is considered that hydrophobicity and hard segment formation seem to resist the hydrolytic and enzymatic degradation of polyurethanes. Synthesized polyurethanes were biodegradable under composting condition to a certain extent depending on their chemical structures. As the hard segment content was increased, biodegradation rate decreased. Biodegradation rate of polyurethanes increased with the following order of diisocyanate used: MDI
Publisher
Elsevier BV
Issue Date
1997-11
Article Type
Article
Citation

POLYMER DEGRADATION AND STABILITY, v.62, no.2, pp.343 - 352

ISSN
0141-3910
URI
http://hdl.handle.net/10203/2292
Appears in Collection
CBE-Journal Papers(저널논문)

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