A process for the preparation of a graft copolymer comprising a polyolefin main chain and one or a multiple polymer side chains and the products obtained therefrom

A process for the preparation of a graft copolymer comprising a polyolefin main chain and one or multiple polymer side chains, the process comprising the steps of:

• A) copolymerizing a first type of olefin monomer and a second type of metal-pacified functionalized olefin monomer using a catalyst system to obtain a polyolefin main chain having a metal-pacified functionalized short chain branch, the catalyst system comprising:
• i) a metal catalyst or metal catalyst precursor comprising a metal from Group 3-10 of the IUPAC Periodic Table of elements;
• and
• ii) a co-catalyst is selected from the group consisting of MAO, DMAO, MMAO, SMAO, fluorinated aryl borane or fluorinated aryl borate;
• B) forming a polymer side chain on the polyolefin main chain, wherein as catalytic initiators the metal-pacified functionalized short chain branch on the polyolefin main chain obtained in step A) is used to obtain the graft copolymer, and wherein during step B) no additional catalyst for the ROP, transesterification or nucleophilic substitution reaction is added.