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Process for preparing norbornene/styrene copolymer

A technology of styrene copolymer and norbornene, which is applied in the field of preparation of norbornene/styrene copolymer by novel bridged diimide nickel catalyst

Inactive Publication Date: 2004-01-07
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No other catalytic system was used in this study

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0013] Embodiment 11. preparation of main catalyst (1) preparation of ligand

[0014] A few drops of glacial acetic acid and 20 mL of dry ethanol were added to the mixture of the bridged diamine (10 mmol) and the quinoline derivative (22 mmol). After the reaction mixture was refluxed for 48 hours under the protection of argon, it was precipitated with refrigerated methanol to obtain yellow crystals, which were the ligands of the catalyst. (2) Preparation of catalyst

[0015] After the ligand (0.25 mmol) and ethylene glycol dimethyl ether nickel bromide (0.47 mmol) were dissolved in 10 mL and 15 mL of dichloromethane, respectively, the former solution was added dropwise to the latter solution. Stir at room temperature for 4 hours. Filtered under the protection of argon, and concentrated until the complex precipitated. After washing three times with ether, it was dried in vacuo. The structure of the obtained main catalyst is shown in the figure below: 2. Monomer processing...

Embodiment 2

[0019] Add 15.7mL norbornene toluene solution to the polymerization reaction, without adding toluene, react for 6 minutes, and the rest are the same as in Example 1.

Embodiment 3

[0021] Add 1.2mL styrene, 14.1mL norbornene toluene solution, 0.4mL toluene to the polymerization reaction, react for 30 seconds, and the rest are the same as in Example 1.

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PUM

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Abstract

The method for preparing norbornene / styrene copolymer byusing new-type bridged diimine nickel catalyst includes the following steps: firstly, adding main catalyst, then adding norbornene monomer solution and styrene monomer, adding solvent, finally adding catalyst promotor. The described main catalyst is the new-type bridged diimine nickel compounding material, its concentration is 1X10 to the minus sixth-1X10 to the minus third mol / L, the described catalyst promotor is methyl aluminium-oxane, triethyl aluminium or or triisobutylaluminium, the mole ratio of the catalyst promotor and main catalyst is 1-10000, the described norbornene monomer is added in the form of methylbenzene solution, and the styrene is added in the form of self-body, and the concentration of co-monomer total quantity in the reaction system is 1.0-10.0 mol / L.

Description

technical field [0001] The invention relates to a method for preparing a norbornene / styrene copolymer with a novel bridging diimine nickel catalyst. Background technique [0002] In recent years, with the development of transition metal catalysts, the field of polyolefin materials has been continuously improved and expanded. The structure of polymers can be tailored by applying specific catalysts or adopting copolymerization methods, and finally new high-performance homopolymers or copolymers can be prepared. Cycloolefins, with norbornene as a typical monomer, are the main monomers or co-monomers used. [0003] The polynorbornene with addition structure has high decomposition temperature, good thermal stability, low hygroscopicity, good gas permeability, high refractive index and good dielectric properties. It is a potential for microelectronics, optics, stacking and gas separation Attractive material [Macromol. Rapid Commun. 22, 479 (2001)]. However, this homopolymer is ...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F236/08
Inventor 胡友良宓霞马志王乐勇李泽柯毓才
Owner INST OF CHEM CHINESE ACAD OF SCI
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