A modified polypropylene which is a polypropylene having a value of racemic diad
fraction [r] in a specific range and modified with a specific compound, e.g., (meth)acrylic
acids, and their derivatives or styrene derivatives to have well-balanced properties
of affinity for polypropylene-based materials, thermal stability, and high solubility
in organic solvents; and a process for producing same. More particularly, the modified
polypropylene which is a polypropylene having a value of racemic diad fraction
[r] of 0.51 to 0.88, determined by 13C-NMR analysis, and chemically
modified with a compound serving as a modifier, e.g., (meth)acrylic acids, and
their derivatives or styrene derivatives; and the process for producing the modified
polypropylene, wherein the polypropylene having a value of racemic diad fraction
[r] in the above range is reacted with at least one type of the compound serving
as the modifier in the presence of a radical initiator.
