Interconnected copolymers of ethylene in combination with at least one polysiloxane
The invention provides a polymer comprising units derived from ethylene and siloxane, polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13 C Nuclear Magnetic Resonance (NMR).
1. A polymer comprising units derived from ethylene and siloxane, the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13 C Nuclear Magnetic Resonance (NMR).
2. The polymer of claim 1 comprising a portion of the ethylene bonded to one or more silicon atoms of the siloxane.
3. The polymer of claim 1 wherein the polymer comprises at least one ethylene-based polymeric branch bonded to a silicon atom of the siloxane.
4. The polymer of claim 1 having a peak melting temperature Tm in ° C. and density in g/cm 3 that satisfies the mathematical relationship:
Tm< 771.5(° C.·cm 3 )(density)−604(° C.).
5. The polymer of claim 1 having a density of at least 0.93 g/cm 3 .
6. The polymer of claim 1 in which less than 40 weight percent of the siloxane is extractable by solvent extraction.
7. The polymer of claim 1 having an I 10 /I 2 ratio of at least 13, wherein I 2 is the melt index of the polymer measured in accordance with ASTM D 1238, Condition 190° C./2.16 kg, in grams eluted per 10 minutes, and I 10 is the melt index of the polymer measured in accordance with ASTM D 1238, Condition 190° C./10 kg, in grams eluted per 10 minutes.
8. The polymer of claim 1 having an I 2 of less than 5, wherein I 2 is the melt index of the polymer measured in accordance with ASTM D 1238, Condition 190° C./2.16 kg, and is reported in grams eluted per 10 minutes.
9. The polymer of claim 1 having a heat of fusion (H f ) in Joules/grams (J/g) and density in g/cm 3 that satisfies the mathematical relationship:
H f <2333 (J·cm 3 /g 2 )×(density)−2009 (J/g).
10. A composition comprising the polymer of claim 1 .
11. An article comprising at least one component formed from the composition of claim 10 .
12. The article of claim 11 in the form of a film.
13. A process to form the polymer of claim 1 comprising units derived from ethylene and siloxane, the process comprising:
A. Contacting at least one siloxane with ethylene in the presence of a free-radical initiator in a first reactor or a first part of a multi-part reactor; and
B. Reacting the siloxane with additional ethylene in the presence fo the free-radical initiator to form an ethylene-based polymeric branch bonded to the siloxane in at least one other reactor or a later part of a multi-part reactor.
14. The process of claim 13 in which the ethylene-based polymeric branch is formed by an ethylene monomer bonding with the siloxane to form an ethylene-siloxane moiety, and the resulting moiety polymerizing with at least additional ethylene monomer to form the ethylene-based polymeric branch.
15. The process of claim 13 in which the ethylene-based polymeric branch is formed independently of the siloxane and is then grafted to the siloxane.