| 摘要 |
<p>The invention relates to a method for the production of a controlled rheological homopolymer or copolymer of propylene or a composition comprising a homopolymer or copolymer of propylene in the absence of a functional monomer. The inventive method increases the melt flow index of the resin by cutting the chains and is characterised in that at least one stable free radical is incorporated into the resin in a viscous state, whereupon a solid product is formed having an increased melt flow index. The stable free radical or radicals are more particularly chosen from nixtroxyl radicals, comprising at least one group =N-O•.</p> |
