Isothermal crystallization of low ethylene content polypropylene random copolymer recovered from decalin and n-hexadecane

The kinetics of isothermal crystallization from the melt of low ethylene content polypropylene random (PPR) copolymer with isotactic propylene sequence recovered from physical gel formed in solvents of varying molecular size was studied by differential scanning calorimetry (DSC). The kinetics analysis for these samples indicates that the PPR recovered from n-hexadecane is easier to crystallize and exhibits higher crystallization rate than the sample recovered from decalin. The influence of melt annealing time on isothermal crystallization was also investigated.