Compositions comprising ethylene-carbon monoxide copolymers
The invention provides a composition comprising an ethylene-based polymer and wherein the ethylene-based polymer has the following properties: (A) a CO content from greater than 0 to less than 10 weight percent CO (carbon monoxide), based on the weight of the polymer, and (B) a melt index (I2) from 0.1 to less than 3 g/10 min; and (C) a density from 0.923 to 0.928 g/cc; and wherein the ethylene-based polymer has a melting point, Tm, in ° C., that meets the following relationship: Tm (° C.)<601.4*(Density N in g/cc)−447.8° C.
1. A composition comprising an ethylene-based polymer consisting of ethylene, carbon monoxide, and propylene, wherein the ethylene-based polymer has the following properties:
(A) a CO content from 0.2 to 0.9 weight percent CO (carbon monoxide), based on the weight of the polymer; and
(B) a melt index (I 2 ) from 0.3 to 1.0 g/10 min; and
(C) a density from 0.923 to 0.928 g/cc; and
(D) a 2% secant modulus (measured on a compression molded plaque) in the range of 27,000 to 34,000 psi; and
(F) C1 branching; and
wherein the ethylene-based polymer has a melting point, Tm, in ° C., that meets the following relationship: Tm (° C.)<601.4*(Density in g/cc) 447.8° C.
2. The composition of claim 1 , wherein the ethylene-based polymer has a MWD(conv) from 4.0 to 10.0.
3. The composition of claim 1 , wherein the ethylene-based polymer is formed from a high pressure, free-radical polymerization.
4. The composition of claim 1 , wherein the ethylene-based polymer has a melting point, Tm, in ° C., that meets the following relationship: Tm (° C.)<601.4*(Density in g/cc)−448.5 (0C).
5. The composition of claim 1 , wherein the ethylene-based polymer has a melt strength(190°) less than, or equal to, 17.0 cN.
6. The composition of claim 1 , wherein the ethylene-based polymer has an amyl group level greater than, or equal to, 0.5 amyl group per 1000 carbon atoms, as determined by 13C NMR.
7. The composition of claim 1 , wherein the ethylene-based polymer has a melt strength of at least 10.0 cN.
8. An article comprising at least one component formed from the composition of claim 1 .
9. The article of claim 8 in the form of a film or sheet.
10. The composition of claim 1 , wherein the ethylene-based polymer has a melting temperature from 105° C. to 110° C.