FIELD: chemistry.
SUBSTANCE: invention relates to a masterbatch comprising one or more organic peroxides dispersed in a bioresin, and the invention relates to a process for preparing said masterbatch and to using said masterbatch to modify a polymer. Masterbatch contains from 4 to 40 wt% of one or more organic peroxides in liquid form distributed in a polymer matrix containing at least 50 wt% biomass, where the polymer matrix has a porosity expressed as a percentage of voids in the matrix volume of 2.5 to 70 vol%, and water concentration in the masterbatch is maintained at 2000 ppm or less, based on the total weight of the masterbatch, wherein the bioresin is polylactide.
EFFECT: masterbatch according to the invention is suitable for improving the compatibility of biopolymer mixtures, as well as modifying polylactide to enhance the melt strength thereof by long chain branching.
10 cl, 4 ex
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