Thermoplastic resin composition and article manufactured using the same
A thermoplastic resin composition and a molded article manufactured using the same. The thermoplastic resin composition includes: a base resin including a poly(alkyl (meth)acrylate) resin and an aromatic vinyl copolymer; a polyether-ester-amide block copolymer; and zinc oxide having an average particle diameter of about 0.2 μm to about 3 μm and a BET specific surface area of about 1 m 2 /g to about 20 m 2 /g, wherein the aromatic vinyl copolymer is a copolymer of an alkyl (meth)acrylate, an aromatic vinyl monomer, and a monomer copolymerizable with the aromatic vinyl monomer.
1. A thermoplastic resin composition comprising:
about 100 parts by weight of a base resin comprising about 40 wt % to 95 wt % of a poly(alkyl (meth)acrylate) resin and about 5 wt % to 60 wt % of an aromatic vinyl copolymer consisting of an alkyl (meth)acrylate, an aromatic vinyl monomer, and a vinyl cyanide monomer;
about 5 parts by weight to 50 parts by weight of a polyether-ester-amide block copolymer; and
0.01 parts by weight to 5 parts by weight of zinc oxide, the zinc oxide having an average particle diameter of about 0.2 μm to about 3 μm and a BET specific surface area of about 1 m 2 /g to about 20 m2/g.
2. The thermoplastic resin composition according to claim 1 , wherein, in the base resin, a weight ratio of the poly(alkyl (meth)acrylate) resin to the aromatic vinyl copolymer ranges from about 1:0.1 to about 1:0.6.
3. The thermoplastic resin composition according to claim 1 , comprising the poly(alkyl (meth)acrylate) resin and the polyether-ester-amide block copolymer in a weight ratio of about 1:0.1 to about 1:1.
4. The thermoplastic resin composition according to claim 1 , wherein the aromatic vinyl copolymer is a copolymer consisting of about 65 wt % to about 80 wt % of the alkyl (meth)acrylate, about 10 wt % to about 30 wt % of the aromatic vinyl monomer, and about 2 wt % to about 10 wt % of the vinyl cyanide monomer.
5. The thermoplastic resin composition according to claim 1 , wherein the polyether-ester-amide block copolymer comprises about 10 wt % to about 95 wt % of a polyether-ester block.
6. The thermoplastic resin composition according to claim 1 , wherein the zinc oxide has a peak position degree (2θ) in the range of 35° to 37° and a crystallite size of about 500 Å to about 2,000 Å in analysis of X-ray diffraction (XRD), as calculated by Equation 1:
Crystallite
size
(
D
)
=
K
λ
β
cos
θ
[
Equation
1
]
where K is a shape factor, λ is an X-ray wavelength, β is an FWHM value (degree) of an X-ray diffraction peak, and θ is a peak position degree.
7. The thermoplastic resin composition according to claim 1 , wherein the zinc oxide has a peak intensity ratio (B/A) of about 0.01 to about 15.0, where A indicates intensity of the peak in the wavelength range of 370 nm to 390 nm and B indicates intensity of the peak in the wavelength range of 450 nm to 600 nm in photoluminescence measurement.
8. The thermoplastic resin composition according to claim 7 , wherein the zinc oxide has a peak intensity ratio (B/A) of about 0.01 to about 1.0, where A indicates intensity of the peak in the wavelength range of 370 nm to 390 nm and B indicates intensity of the peak in the wavelength range of 450 nm to 600 nm in photoluminescence measurement.
9. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has an impact resistance of about 900 mm or higher, the impact resistance indicating a height from which dropping al kg metal tip results in cracking of a 3.2 mm thick specimen in a Dupont drop impact test.
10. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has an antibacterial activity of about 2.0 to about 7.5 (against Staphylococcus ) and about 2.0 to about 7.5 (against Escherichia coli ), as measured on a 5 cm×5 cm specimen in accordance with JIS Z 2801 after the specimen is subjected to inoculation with each of Staphylococcus aureus and Escherichia coli , followed by culturing under conditions of 35° C. and 90% RH for 24 hours.
11. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a surface resistance of about 10 5 Ω·cm to about 10 10 Ω·cm, as measured in accordance with ASTM D257.
12. A molded article formed of the thermoplastic resin composition according to claim 1 .
13. The thermoplastic resin composition according to claim 1 , wherein the poly(alkyl (meth)acrylate) resin consists of one or more C 1 to C 14 alkyl group-containing (meth)acrylate monomers.