TY - JOUR
T1 - H-NMR Spectroscopy Analysis of Homo- and Copolymers of L-lactic Acid
AU - Ping Lan & Wei Wang
JO - Journal of Fiber Bioengineering and Informatics
VL - 2
SP - 137
EP - 140
PY - 2009
DA - 2009/02
SN - 2
DO - http://doi.org/10.3993/jfbi092009
UR - https://global-sci.org/intro/article_detail/jfbi/4996.html
KW - Poly(lactic acid)
KW - ¹H nuclear magnetic resonance
KW - number-average molecular weight
KW - racemization
AB - A direct polymerization process was developed to synthesize homo- and copolymers of L-lactic
acid. The properties and structures of the products were characterized by ¹H nuclear magnetic resonance
(¹H-NMR). It was found that PLLA can be prepared by direct synthesis using melt polycondensation.
Moreover, the number-average molecular weight (\overline{Mn}) and compositions of each polymer was determined
by ¹H-NMR spectra. In the meantime, the ¹H-NMR spectra was also used for racemization analysis..