DIELECTRIC STUDIES OF THE POLYMERIZATION OF DIETHYLENE GLYCOL BIS(ALLYL CARBONATE)

Results of dielectric studies are presented for the polymerization of diethylene glycol bis (allyl carbonate). Two transitions are observed in the dielectric spectra, one that can be related to motion of the carbonate unit and another that has been identified as the glass transition. A relation between the glass transition temperature and the level of conversion of double bonds has been established for this system in the 70 to 100% conversion range. While there appears to be a one-to-one relationship between these two parameters, such is not the case for the position of the low-temperature, secondary transition and the level of conversion. This latter result is interpreted in terms of the local free volume available in the crosslinked system.