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Process for preparing additively structured polynorbornene

A technology of polynorbornene and bridged diimine nickel, which is applied in the field of preparation of addition-structured polynorbornene with new bridged diimine nickel and palladium catalysts, which can solve the problems of insufficient comprehensive performance of catalytically active polymers

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

AI Technical Summary

Problems solved by technology

However, the catalytic activity of the nickel and palladium catalysts used therein and the overall performance of the polymers prepared therefrom are still insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0013] Embodiment 11. Preparation of main catalyst

[0014] (1) Preparation of ligand

[0015] To a mixture of bridged diamine (10 mmol) and pyridine (or quinoline) derivative (22 mmol) was added a few drops of glacial acetic acid and 20 mL of dried ethanol. 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 catalysts 1-4 and 7-10. Ligands for catalysts 5 and 6 were prepared by adding two drops of concentrated sulfuric acid and Si(OEt) to a mixture of diamine (10 mmol) and 2-benzoylpyridine (22 mmol) 4 (23 mmol). The reaction mixture was heated to 150°C under an argon atmosphere and maintained at this temperature for about 10 hours. The residue was dissolved in 100 mL of ether and washed with Na 2 SO 4 dry. After distilling off volatile substances in the filtrate, it was purified by column chromatography.

[0016] (2) preparation of cataly...

Embodiment 2

[0020] Use main catalyst 2 in the polymerization reaction, all the other are with embodiment 1.

Embodiment 3

[0022] Use main catalyst 3 in the polymerization reaction, all the other are with embodiment 1.

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Abstract

The method for preparing polynorbornene by using novel bridged diimine nickel and palladium catalyst includes the following steps: firstly, adding main catalyst, then adding norbornene monomer solution, then adding solvent, finally adding catalyst promoter, the described main catalyst is the bridged diimine nickel and palladium compounding material, its concentration is 1X10 to the minus sixth-1X10 to the minus third mal / L, the described catalyst promoter is methyl aluminium-oxane, triethyl aluminium o r triisobutylaluminium, the mole ratio of the catalyst promotor and main catalyst is 1-10000, the solvent of the described norbornene monomer solution is methylbenzene, and the concentration of monomer in reaction system is 0.01-6.0 mol / L, the solvent of the described system i s methylbenzene, and its reaction temp. is 0 deg.C-90 deg.C.

Description

technical field [0001] The invention relates to a method for preparing addition structure polynorbornene by using novel bridging diimine nickel and palladium catalyst. Background technique [0002] Norbornene, that is, bicyclo[2.2.1]hept-2-ene, has a complex polymerization mechanism, and there are three types: ring-opening metathesis polymerization, vinyl addition polymerization and free radical or cationic polymerization mechanism. The field of preparation of norbornene mainly relies on the mechanism of coordination polymerization to obtain ring-opening metathesis polymers or vinyl addition polymers, and to improve the polymerization activity or improve the structure and performance of polymers by developing various catalysts. [0003] In the industry, in the 1950s, the Du Pont company used tetraheptyl aluminum lithium / titanium tetrachloride Ziegler-Natta catalytic system to obtain ring-opening metathesis polymers mainly containing trans double bond structures [E.I.du pont ...

Claims

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Application Information

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IPC IPC(8): C08F236/02
Inventor 胡友良宓霞马志王乐勇柯毓才
Owner INST OF CHEM CHINESE ACAD OF SCI
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