| 主权项 |
1. A metallized article comprising a thermoplastic composition comprising:
(a) a first polycarbonate that includes structural units derived from at least one of: wherein Ra and Rb at each occurrence are each independently halogen, C1-C12 alkyl, C1-C12 alkenyl, C3-C8 cycloalkyl, or C1-C12 alkoxy; p and q at each occurrence are each independently 0 to 4; R13 at each occurrence is independently a halogen or a C1-C6 alkyl group; c at each occurrence is independently 0 to 4; R14 at each occurrence is independently a C1-C6 alkyl, phenyl, or phenyl substituted with up to five halogens or C1-C6 alkyl groups; Rg at each occurrence is independently C1-C12 alkyl or halogen, or two Rg groups together with the carbon atoms to which they are attached form a four-, five, or six-membered cycloalkyl group; t is 0 to 10; and x:y is 1:99 to 99:1; (b) optionally a second polycarbonate that is a BPA polycarbonate having a Mw of 17,000 g/mol [±1,000 g/mol] to 24,000 g/mol [±1,000 g/mol], as determined by GPC using BPA polycarbonate standards; (c) a hydroxyl-functionalized flow promoter; (d) optionally a third polycarbonate that is a BPA polycarbonate having a Mw of 17,000 g/mol [±1,000 g/mol] to 40,000 g/mol [±1,000 g/mol], as determined by GPC using BPA polycarbonate standards; provided the third polycarbonate is different from the second polycarbonate; and (e) optionally a fourth polycarbonate that is a BPA polycarbonate-polydimethylsiloxane copolymer comprising 5 wt % to 25 wt % siloxane, having an average polydimethylsiloxane block length of 30 to 100 units; wherein the composition has a heat deflection temperature of at least 140° C., measured at 0.45 MPa in accordance with ISO 75; wherein the composition has a melt viscosity of less than 350 Pa·s, measured in accordance with ISO 11443 at 300° C. at a shear rate of 1500 s−1. |
