Studies on the effect of extraction of isophorone diisocyanate-based segmented polyurethanes
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Linear segmented polyurethane was synthesised, using isophorone diisocyanate (IPDI), poly(tetramethylene oxide) glycol (PTMG) and 1,4 butanediol, for use in biomedical applications. The chemical stability of this polyurethane in hot methanol during Soxhlet extraction was studied by viscosity measurements, thermal studies, mechanical tests, ultraviolet and infrared spectral studies, and gel permeation chromatography. Hot methanol degrades the polymer at the allophanate linkages, while extracting low molecular weight polyurethane fractions. More urea linkages are formed in the extracted polymer.
KeywordsPolyurethane isophorone diisocyanate extraction degradation allophanate linkage
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- Borchard U 1981 InSystemic aspects of biocompatibility (ed.) D F Williams (Boca Raton, Florida: CRC Press) vol. 2 p. 107Google Scholar
- Bruck S D 1980Properties of biomaterials in physiological environment (Boca Raton, Florida: CRC Press) p. 76Google Scholar
- David D J and Staley H B 1969Analytical chemistry of polyurethane (New York: Wiley Interscience) part 3, p. 161Google Scholar
- Frisch K C 1969Polyurethane technology (ed.) Bruins (New York: Interscience Pub) p. 1Google Scholar
- Guidoin R, Gosselin C, Roy J, Gansnon D, Marois M, Noej H P Roy P, Martin L, Awad J, Bourossa D, Rouleav C and Blais P 1980 InStructural and mechanical properties of dacron prostheses as arterial substitutes (eds) G W Hastings and D F Williams (New York: John Wiley and Sons) p. 547Google Scholar
- Hatada K, Ute K and Pappas P S 1987J. Polym. Sci. Polym. Lett. 25 477Google Scholar
- Ono H, Jones F N and Pappas P S 1985J. Appl. Polym. Sci. 23 509Google Scholar
- Ratner B D 1981 InPhoton, electron and ion of polymer structure and properties (eds) D W Dwight, T J Fabish and H R Thomas (ACS Symposium series) (Washington, DC: Am. Chem. Soc.) p. 371Google Scholar
- Saunders J H and Frisch K C 1964Polyurethane chemistry and technology (New York: Interscience) part 2, p. 299Google Scholar
- Ulrich H, Bonic A W and Coloucr G C 1980Synthetic biomedical polymers (eds) M Sizycher and W J Robinson (West Fort: Technomic Publishers) p. 29Google Scholar