Polymers with low levels of volatile organic compounds and methods of making such polymers

An impact copolymer obtained by combining a solid magnesium and halogen-containing titanium compound with propylene and hydrogen in a slurry reactor to produce a polypropylene reaction product, followed by combining ethylene and propylene with the polypropylene reaction product and hydrogen in a gas phase reactor to obtain the impact copolymer comprising a polypropylene and within a range from 5 wt % to 40 wt % of an EPR, by weight of the impact copolymer;

• wherein the polypropylene has a melt flow rate within a range from 160 g/10 min to 310 g/10 min, as determined by ASTM D1238, 2.16 kg, 230° C., and the impact copolymer has a melt flow rate within a range from 15 g/10 min to 150 g/10 min, as determined by ASTM D1238, 2.16 kg, 230° C.;
• and wherein there are less than 1000 μg of oligomer per gram of impact copolymer as determined by chloroform extraction at 60° C. to form a chloroform extract followed by gas chromatography to determine an amount of oligomer and the oligomers are C6 to C21 hydrocarbon compounds;
• and wherein the impact copolymer has a Flexural Modulus within a range from 1210 MPa to 1940 MPa, as determined by ISO 178.