FTIR-ATR spectra were obtained using a Nicolet 510P IR spectrometer with a resolution of 4 cm -1 over the wave number range of 4000-400 cm -1 . Signals were averaged over 64 scans for each spectrum. The DSC thermal scans with two heating and intervening cooling steps were recorded on a Perkin-Elmer Diamond DSC-7 instrument. Nitrogen was used as the purge gas and Indium was used for calibration. Samples were first heated from 25 to 150° C, held at 150° C for at least 1 minute, then cooled to 25° C and followed by a second identical heating to 150° C. Both heating and cooling rates were 20° C/min, and their resulting thermograms were analyzed using Pyris software. The onsets of increased heat capacities were were taken as Tgs.