Differential scanning calorimetry poly hybrid

Poly(ethylene glycol)-polypeptide block copolymers are of particular interest, from both a structural and a functional point of view. In addition to microphase separation and the tendency of the peptide blocks towards aggregation, crystallization of poly(ethylene glycol) (PEG) introduces an additional factor that can influence the structure formation of these hybrid block copolymers. Ma and coworkers (Zhang et ai, 2003) have investigated the solid-state structure and properties of three poly(ethylene glycol)-Z /ocA -poly(L-Alanine) (PEG-Z -PLAla) copolymers that were prepared from a PEG macroinitiator with M = 2 kg/mol. The diblock copolymers contained 39.8, 49.6 and 65.5 mol% alanine. Erom FTIR spectra and differential scanning calorimetry (DSC) measurements, the authors proposed a microphase-separated bulk structure. 

In this work, the structure, morphology and crystallization behavior of a semi-crystalline polymer, poly(ethylene oxide), PEO, when mixed with natural montmorillonite (Na -MMT) are studied [9]. The structure of the hybrids was investigated by X-ray diffraction (XRD), the thermal properties by Differential Scanning Calorimetry (DSC) and the kinetics of crystallization by isothermal Polarized Optical Microscopy (POM) and isothermal DSC. It is known that for PEO /... 

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