Polyolefin nano-composite

1. A polyolefin nanocomposite prepared by polymerizing an olefin monomer in a catalyst system, the catalyst system comprising (1) a supported catalyst consisting of a polymer, a silicate clay mineral, and a transition metal compound, and (2) an alkyl aluminoxane, wherein the polymer is one or more selected from the group consisting of acrylonitrile-based polymers, hydroxyl group-containing polymers, acryl-or acrylate-based polymers, maleic anhydride-containing or maleic anhydride-modified polymers, acetate-based polymers, polyether-based polymers, polyketone-based polymers, polyamide-based polymers, and polyurethane-based polymers.

2. The polyolefin nanocomposite according to claim 1 , wherein the olefin monomer is one or more selected from the group consisting of ethylene, propylene, 1-pentene, 1-butene,4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, ethylidene, norbonene, 1,4-hexadiene, 1,5-hexadiene, 3-methyl-1-butene, 3-methyl-1-pentene, dicyclopentadiene, ethylene-propylene-diene, vinylcycloalkane.

3. The polyolefin nanocomposite according to claim 1 , wherein the silicate clay mineral is one or more selected from the group consisting of montmorillonite, hectorite, saponite, nontronite, beidellite, laponite, vermiculite, halloysite, sauconite, magadite, medmontite, and kenyte.

4. The polyolefin nanocomposite according to claim 1 , wherein the transition metal compound is represented by the formula (1) or (2):

(C 5 R a 1 H 5−a ) p (C 5 R b 2 H 5−b ) q MR r 3   (1)

[(C 5 R a 1 H 5−a ) p (C 5 R b 2 H 5−b ) q MR r 3 L m ] n+ [R 4 ] n−   (2)

in the above formulas (1) and (2),

each of R 1 and R 2 , independently, is C 1-20 alkyl, alkoxy, aryl, alkylaryl, arylalkyl, aryloxy, alkylene or alkyliden group, silyl group, silylene group, ammo group, phospinyl group, or cyclopentadienyl group, indenyl group, fluorenyl group or derivatives thereof, wherein any of the hydrocarbon groups can be substituted with halogen atom, phosphorous functional group, nitrogenous functional group or silicon-containing functional group; R 1 and R 2 can be connected to each other to form a ring; and, where multiple R 1 's and R 2 's exist, the respective R 1 's and R 2 's can be connected to each other to form rings;

R 3 is hydrogen atom, halogen atom, C 1-20 alkyl, alkoxy, aryl, alkylaryl, arylalkyl, aryloxy or thioalkoxy group, silyl group, or amide group, wherein any of the hydrocarbon groups can be substituted with halogen atom; and R 3 can be connected to either R 1 or R 3 to form a ring,

M is a group III, IV, Y or VI metal atom;

L is an electrically neutral ligand compound;

[R 4 ] n− is an anion neutralizing a cation; m is an integer from 0 to 3;

each of a and b, independently, is an integer from 0 to 5;

each of p, q and r, independently, is an integer from 0 to 3, provided that in the above formula (1), p+q+r is equal to V (wherein, V is valence of M), and in the above formula (2), p+q+r is equal to V−n; and n is an integer from 0 to V (wherein, V is valence of M).

5. The polyolefin nanocomposite according to claim 1 , wherein the alkyl aluminoxane is represented by the formula (3):

wherein, R 5 is C 1-8 alkyl group; and j is an integer from 2 to 50.

6. The polyolefin nanocomposite according to claim 1 , wherein the catalyst system further comprises an alkyl aluminum.

7. The polyolefin nanocomposite according to claim 6 , wherein the alkyl aluminum is represented by the formula (4):

AlR 6 3   (4)

wherein, R 6 is a C 1-8 alkyl group.