| 摘要 |
Foamable polymer blends, foamed polymer compositions made therefrom, and processes for making such blends and foamed compositions, are disclosed. The polymer blends include at least a first polymer component, including a propylene homopolymer or a copolymer of propylene and a minor amount (less than 10 % by weight) of echylene or an alpha-olefin, and a second polymer comonent, including one or more random copolymers of propylene (65 to 95 % by weight) and ethylene or an alpha-olefin. The polymer blends contain from 50 % to 99.9 % by weight of the first polymer component, and a have a crystallinity of from 2 % to 65 % from isotactic propylene sequences. Physical or chemical blowing agents are used to foam the polymer blend, to form a foamed polymer blend of the present invention havign improved ealstic properties. |
