| 摘要 |
A tri-block copolymer is disclosed for use in thermoplastic blends. The tri-block copolymer comprises an aromatic monomer, an olefin monomer, and a alkyl (meth)acrylate monomer. One use is for a thermoplastic polymer blend which comprises (a) at least one thermoplastic polycondensate polymer, preferably both a polycarbonate and a polyester, and (b) a combination of impact modifiers. The combination of impact modifiers comprises (i) a core/shell additive having an elastomeric core, (ii) a linear terpolymer of ethylene, alkyl (meth)acrylate, and a monomer which contains a heterocycle containing one oxygen atom as the hetero-atom, and (iii) the tri-block copolymer. A second use is the tri-block copolymer as the sole impact modifier for a blend of polycarbonate and polyester.
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