| 摘要 |
<p>Polypropylene heterophasic copolymers with good flow and impact properties are made by visbreaking a starting polypropylene heterophasic copolymer of which the amorphous rubber has an intrinsic viscosity of 2 dl/g or more and the ethylene content in the amorphous rubber, determined as C2 or AM, is from 20 wt.% to 45 wt.%.</p> |
