Solution casting/crystallisation from

In a separate study, PCL (molecular weight 15,000) was blended with poly(L-lactide) (molecular weight 10,000) by casting from solutions in chloroform and drying under vacuum at 60 °C for 24 h. DSC scans of samples heated to 200 °C and quenched showed that the Tg of poly(L-lactide) overlapped with the Tj of PCL, which rendered detailed analysis of the thermograms and assessment of polymer-polymer miscibility difficult. However, the cold-crystallisation exotherm of pure poly(L-lactide), at 131 °C, was shifted in the blends containing more than 50 wt % poly(L-lactide) to about 95 "C this shift was independent of the poly(L-lactide) content. In addition, the crystallisation rate for PCL was... 

In conclusion, it is believed that IR spectra of sPS obtained under different crystallisation and thermal conditions are characteristic of the overall structural regularity and the specific chain conformations present. Spectra of samples cast from dilute solution are... 

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