Lactic acid based poly(ester-urethane)s:
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Kari Hiltunen; Jukka V. SeppΓ€lΓ€; Mika HΓ€rkΓΆnen
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Article
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1997
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John Wiley and Sons
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English
β 198 KB
π 2 views
A two-step process for lactic acid polymerization is studied: in the first step the lactic acid is condensation-polymerized to a low-molecular-weight hydroxylterminated prepolymer; and then the molecular weight is raised by joining prepolymer chains together using diisocyanate as the chain extender.