Poly(alkylene carbonate) resin composition, preparation method thereof, molded article formed therefrom, and preparation method of molded article using the same

A method of preparing a poly(alkylene carbonate) resin composition, the method comprising the steps of:

• preparing a poly(alkylene carbonate) having a weight average molecular weight of 100,000 g/mol to 500,000 g/mol by polymerizing monomers including an alkylene oxide and carbon dioxide in the presence of a catalyst;
• and
• dry-blending the prepared poly(alkylene carbonate) with a polyamide having a melting point of 180° C. to 194° C. at a weight ratio of 95:5 to 75:25, wherein the polyamide is a pellet having a diameter of 1 mm to 5 mm,
• wherein the poly(alkylene carbonate) is polyethylene carbonate, and
• wherein the polyamide has relative viscosity of 3.5 to 5 as measured according to ISO 307 and calculated by the Huggins method after dissolving polyamide in 96% (m/m) of sulfuric acid at a concentration of 1% (m/v).