Preparation of Higher Molecular Weight Poly (<small class="sc">L</small>-lactic Acid) by Chain Extension

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="315917.fig.003a" src="https://static.hindawi.com/articles/ijps/volume-2013/315917/figures/315917.fig.003a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>prepolymer </td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="315917.fig.003b" src="https://static.hindawi.com/articles/ijps/volume-2013/315917/figures/315917.fig.003b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Run3</td></tr></table></td></tr></table>

<table><sup>1</sup>H-NMR spectrum of PLA prepolymer (a) and the PLA chain extended with HDI (Run3) (b).</table>

International Journal of Polymer Science

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Figure 3

Figure 3: Preparation of Higher Molecular Weight Poly (<small class="sc">L</small>-lactic Acid) by Chain Extension 

International Journal of Polymer Science

Preparation of Higher Molecular Weight Poly (L-lactic Acid) by Chain Extension

Figure 3