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Synthesis of poly(lactic acid)‐based polyurethanes
Author(s) -
Chen SzuHsien,
Tsao ChingTing,
Chou HungChia,
Chang ChihHao,
Hsu ChingTe,
Chuang ChingNan,
Wang ChihKuang,
Hsieh KuoHuang
Publication year - 2013
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4400
Subject(s) - adipate , trimethylolpropane , polyester , lactic acid , materials science , polyurethane , butanediol , prepolymer , biodegradation , polyol , thermal stability , polycaprolactone , polymer chemistry , polymer , organic chemistry , chemistry , composite material , biology , bacteria , fermentation , genetics
Abstract Poly(lactic acid) ( PLA ) is a biodegradable aliphatic polyester, but its brittleness makes it unsuitable for many packaging and appliance applications. The goal of the work reported was to create novel poly(ester urethane)s that incorporate biodegradable poly(lactic acid) diols ( PLA‐OHs ) and good mechanical properties of increased molecular weight via crosslinked network formation for engineering plastics applications. Three kinds of polyols ( PLA‐OHs , PLA‐OHs /poly(tetramethylene ether) glycol or PLA‐OHs /poly(butylene adipate) glycol ( PBA )) and two kinds of diisocyanates (4,4‐diphenylmethane diisocyanate ( MDI ) or toluene 2,4‐diisocyanate ( TDI )) were chosen for the soft and hard segments to compare their mechanical properties. In addition, 1,4‐butanediol and trimethylolpropane were each used as chain extender agents. Results showed the PLA / PBA ‐polyurethanes ( PLA / PBA‐PUs ) of the MDI series and the PLA / PBA‐PUs of the TDI series had improved thermal stability and enhanced mechanical properties. Degradation behavior showed the PLA ‐based polyurethanes could be degraded in phosphate‐buffered saline solution and enzyme solution. © 2012 Society of Chemical Industry