Functional polyolefin/montmorillonite nano-composite material and its preparation method

A technology for nanocomposite materials and montmorillonite nanosheets, which is applied in the preparation field of the above materials, can solve the problems of poor structural stability and difficult peeling of montmorillonite sheets, and achieves enhanced interface bonding, clear and controllable composition and structure. , to avoid the effect of inactivation

Inactive Publication Date: 2006-08-30
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of monomer in-situ polymerization (Chem Commun, 1999: 2179; Macromol Rapid Commun, 1999, 20: 423; WO 99 / 47589) overcomes the surface polarity of polyolefin and montmorillonite in the melt mixing method. The shortcoming that the montmorillonite sheet is not easy to peel off caused by the huge difference, as described in CN1510058A, the in-situ polymerization method can easily prepare the exfoliated polyolefin / montmorillonite nanocomposite material, but the phase structure of this nanocomposite material is stable Poor stability, montmorillonite nanosheets re-agglomerate under high temperature and shear conditions during processing (Chem Mater 2001, 13: 3516-3523)

Method used

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  • Functional polyolefin/montmorillonite nano-composite material and its preparation method
  • Functional polyolefin/montmorillonite nano-composite material and its preparation method
  • Functional polyolefin/montmorillonite nano-composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of the intercalation catalyst: 10 g of Na-montmorillonite was formulated into a 5%-20% suspension, settled still, and the upper suspension was taken for later use. Make a certain amount of cetyltrimethylammonium bromide (long carbon chain alkyl quaternary ammonium salt) into an aqueous solution, add it to the clay suspension, heat to 90°C, stir vigorously, and react for 4 hours. The solution was suction filtered to obtain a white precipitate, which was washed with deionized water until there was no Cl- (checked with 0.1% silver nitrate solution). The obtained product was vacuum-dried at 80° C. for 24 hours to obtain organic montmorillonite, which was ground into powder.

[0048] Under the protection of argon or nitrogen, disperse 5 g of the above organic montmorillonite in 300 ml of toluene at 60 ° C, add 20 ml of methylaluminoxane (MAO), stir for 6 hours, add 100 ml of toluene solvent and metallocene such as Et after filtration [Ind] 2 ZrCl 2 The toluene...

Embodiment 2-6

[0054] The preparation method of the intercalation catalyst of Examples 2-6 is the same as that of Example 1.

[0055] Example 2-6

[0056] Preparation of reactive polyethylene / montmorillonite nanocomposite intermediate: Others are the same as in Example 2, and the operating conditions and properties of the composite are listed in Table 1.

[0057] Preparation of functionalized polyethylene / montmorillonite nanocomposite material: Others are the same as in Example 2, and the operating conditions and properties of the composite material are listed in Table 2.

[0058] Reality

[0059] Example

[0060] The data in Table 1 shows that after the reactive polyethylene / montmorillonite nanocomposite intermediate is processed, the montmorillonite nanosheets are aggregated, and in-situ copolymerization is not easy to prepare structurally stable polyolefin nanocomposites. The data in Table 2 show that the obtained functionalized polyethylene / montmorillonite nanocompo...

Embodiment 7-9

[0062] The preparation of intercalation catalyst: modifying agent is dioctadecyl dimethyl quaternary ammonium salt (long carbon chain alkyl quaternary ammonium salt), and other operating conditions are with embodiment 1.

[0063] Preparation of reactive polyethylene / montmorillonite nanocomposite intermediate: same as Example 2, 3 and 4.

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Abstract

The present invention discloses a functional polyolefine/montmorillonite nano composite material and its preparation method. Said method includes the following steps: intercalating olefin hydrocarbon polymerization catalyst into interlamination of montmorillonite, introducing olefin hydrocarbon monomer and reactive comonomer and making them implement copolymerization in interlamination of montrorillonite, then utilizing functionalization reaction to convert the reactive group into polar group so as to make the polar group be grafted on the polyolefine macromolecular chain. The polyolefine molecular chain in said functional polyolefine/montrorillonite nano composite material contains polar group, so that the mutual action of said polyolefine and montrorillonite can be greatly raised, the montrorillonite flake layers are uniformly dispersed in the polyolefine base body so as to form the polyolefine/montrorillonite nano composite material with stable structure.

Description

technical field [0001] The invention relates to a functionalized polyolefin / montmorillonite nanocomposite material. [0002] The invention also relates to a method for the preparation of the aforementioned materials. Background technique [0003] Polyolefin (including polyethylene, polypropylene, ethylene-propylene copolymer, etc.) resin is a general-purpose polymer material with a large amount and a wide range, which is widely used in various fields of daily life, but general-purpose polyolefin materials have thermal and mechanical properties. Poor cons. Since polyolefin resin is a non-polar polymer, it is generally difficult to modify it with polar inorganic materials, which limits its application in the field of high-tech materials. Montmorillonite is a layered silicate with a high aspect-to-thickness ratio. When the exfoliated nano-montmorillonite sheets are uniformly dispersed in the polymer matrix, the physical and mechanical properties and processing properties of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/02C08L25/08C08K3/34C08F2/44
Inventor 董金勇黄英娟郭存悦
Owner INST OF CHEM CHINESE ACAD OF SCI
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