Polyethylene compositions and articles made therefrom

1. A polyethylene composition comprising at least 65 wt % ethylene derived units and from 0 to 35 wt % of C 3 -C 12 olefin comonomer derived units, based upon the total weight of the polyethylene composition; wherein the polyethylene composition has:

a) an RCI,m of 100 kg/mol or greater, such as 150 kg/mol or greater;

and one or both of:

b) a Tw 1 -Tw 2 value of from −16 to −38° C.; and

c) an Mw 1 /Mw 2 value of at least 0.9, such as at least 2 or at least 3;

and one or more of the following:

d) a density of from 0.890 g/cm 3 to 0.940 g/cm 3 ;

e) a melt index (MI) of from 0.1 g/10 min to 30 g/10 min;

f) a melt index ratio (I 21 /I 2 ) of from 10 to 90, such 30 to 55, or 35 to 45;

g) an M w /M n of from 2 to 16;

h) an M z /M w of from 2.5 to 2.8;

i) an M z /M n of from 10 to 50, such as 25 to 50, or 25 to 45; and

j) a g′(vis) of 0.90 or greater;

and further wherein the internal unsaturation of the polyethylene composition as measured by 1 H NMR is more than 0.2 total internal unsaturation per thousand carbon atoms.

2. The polyethylene composition of claim 1 , wherein the C 3 -C 12 olefin comonomer derived units are C 4 -C 8 α-olefin comonomer derived units.

3. The polyethylene composition of claim 1 , wherein the polyethylene composition comprises from 0.5 to 20 wt % of the C 3 -C 12 olefin comonomer derived units, based upon the total weight of the polyethylene composition.

4. The polyethylene composition of claim 1 claims, wherein the polyethylene composition comprises from 1 to 10 wt % of C 4 -C 8 α-olefin comonomer derived units, based upon the total weight of the polyethylene composition.

5. The polyethylene composition of claim 1 , wherein the polyethylene composition has a Tw 1 -Tw 2 value of from −23 to −36° C.

6. The polyethylene composition of claim 1 , wherein the polyethylene composition has a Tw 1 -Tw 2 value of from −23 to −33° C.

7. The polyethylene composition of claim 1 , wherein the polyethylene composition has an Mw 1 /Mw 2 value of from 0.9 to 4.

8. The polyethylene composition of claim 1 , wherein the polyethylene composition has an Mw 1 /Mw 2 value of from 1.25 to 4.

9. The polyethylene composition of claim 1 , wherein the polyethylene composition has a melt index (MI) of from 0.1 g/10 min to 6 g/10 min.

10. The polyethylene composition of claim 1 , wherein the polyethylene composition has a melt index ratio (I 21 /I 2 ) of from 20 to 45.

11. The polyethylene composition of claim 1 , wherein the polyethylene composition has a high load melt index (I 21 ) of from 5 to 60 g/10 min.

12. The polyethylene composition of claim 1 , wherein the polyethylene composition has an M w /M n of from 5 to 10.5.

13. The polyethylene composition of claim 1 , wherein the polyethylene composition has a g′(vis) of 0.940 or greater.

14. The polyethylene composition of claim 1 , wherein the polyethylene composition has a density of from 0.900 g/cm 3 to 0.930 g/cm 3 .

15. The polyethylene composition of claim 1 , wherein the polyethylene composition an RCI,m of 200 kg/mol or greater.

16. The polyethylene composition of claim 1 , wherein the polyethylene composition is made by polymerizing ethylene and hexene in the presence of a catalyst system comprising bis(n-propyl-Cyclopentadienyl)Hf(CH 3 ) 2 and rac/meso bis-1-Ethyl-Indenxl)Zr(CH 3 ) 2 .

17. An article made from the polyethylene composition of claim 1 , wherein the article is optionally a blown film or cast film.

18. A film made from the polyethylene composition of claim 1 , wherein the film has an average MD/TD modulus 1.2*X or more, where X=(2,065,292*density of polyethylene composition)−1,872,345.

19. The film of claim 18 , wherein the film exhibits an average MD/TD modulus of between 30,000 psi and 40,000 psi.

20. The film of claim 18 , wherein the film has a dart drop impact resistance of 600 g/mil or greater.

21. The film of claim 18 , wherein the film has a dart drop impact resistance of 700 g/mil or greater.

22. The film of claim 18 , wherein the film has an Elmendorf tear resistance of 300 g/mil or greater in the machine direction (MD).

23. The film of claim 18 , wherein the film has an Elmendorf tear resistance of 350 g/mil or greater in the machine direction (MD).

24. The film of claim 18 , wherein the film has a haze of 12% or less.

25. The film of claim 18 , wherein the polymer composition has an MIR of 35 to 55, and, wherein the film has an Elmendorf tear resistance of 300 g/mil or more in the machine direction (MD), and/or a dart drop impact resistance of at least 500 g/mil or more.