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Bimodal molecular weight distributed cycloolefin copolymer and preparation method thereof

A technology of cycloolefin copolymer and molecular weight distribution, which is applied in the field of preparation of bimodal molecular weight distribution cycloolefin copolymer by solution polymerization, to achieve excellent mechanical properties, excellent processing performance, and avoid gelation

Active Publication Date: 2016-04-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no disclosure of using a single reactor to synthesize bimodal molecular weight distribution cycloolefin copolymer products

Method used

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  • Bimodal molecular weight distributed cycloolefin copolymer and preparation method thereof
  • Bimodal molecular weight distributed cycloolefin copolymer and preparation method thereof
  • Bimodal molecular weight distributed cycloolefin copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A 100 ml tank reactor was used in this example. Dissolve 8.9 milliliters of refined norbornene (0.09 mol) in 50 milliliters of refined toluene to form a solution, add the solution to a reactor flushed with nitrogen in advance, and press ethylene (1 bar) several times to make the solution saturated with ethylene, Under the condition of 70°C temperature, 1 bar and stirring, add 0.1 mmol chain transfer agent (triethylaluminum and diethyl zinc molar ratio 1:1, that is, triethyl aluminum and diethyl zinc each 0.05 mg) mol), 1.8 ml of a toluene solution with a concentration of 1.72 mol / L methylaluminoxane, 1 μmol of salicylidene 2-methoxyaniline titanium trichloride and 1 μmol of rac-vinyl (diindene base) zirconium dichloride double-active center composite catalyst, the polymerization process is supplemented by metering ethylene, and the control pressure is 1 bar.

[0044] After 30 minutes of reaction, the reaction solution was poured into ethanol containing 15% (volume %) h...

Embodiment 2

[0046] A 100 ml tank reactor was used in this example. Dissolve 14.8 milliliters of refined vinyl norbornene (0.11 mol) in 50 milliliters of refined toluene to form a solution, add the solution to the reactor flushed with nitrogen in advance, and press ethylene (1 bar) several times to make the solution saturated with ethylene Saturation, at 70°C, 1 bar and stirring, add 0.1 mmol of chain transfer agent (trimethylaluminum and diisobutyl zinc molar ratio 1:20), 1.8 ml concentration of 1.72 mol / L A toluene solution of methylaluminoxane, 2 micromoles of 3,5-di-tert-butylsalicylidene 2-mercaptoaniline titanium trichloride and 1 micromoles of benzhydryl (cyclopentadienyl) (fluorenyl ) double active center composite catalyst of zirconium dichloride, during the polymerization process, ethylene is added by supplementary metering, and the control pressure is 1 bar.

[0047] After 30 minutes of reaction, the reaction solution was poured into ethanol containing 15% (volume %) hydrochlor...

Embodiment 3

[0049] A 100 ml tank reactor was used in this example. Dissolve 8 milliliters of refined norbornene (0.08 mol) in 50 milliliters of refined toluene to form a solution, add the solution to the reactor flushed with nitrogen in advance, and punch ethylene (1 bar) several times to make the solution saturated with ethylene, Under the conditions of temperature of 60°C, 1 bar and stirring, 0.3 mmol of chain transfer agent (molar ratio of triethylaluminum and dimethyl zinc is 1:50), 3.8 ml of methylaluminum oxide with a concentration of 1.72 mol / L were added successively. Two active site complexes of alkanes in toluene, 1 μmol of salicylidene 2-mercaptoaniline titanium trichloride and 2 μmol of rac-dimethylsilylbis(2-methylindenyl)zirconium dichloride Catalyst, the polymerization process is supplemented by metering ethylene, and the control pressure is 1 bar.

[0050] After 60 minutes of reaction, the reaction solution was poured into ethanol containing 15% (volume %) hydrochloric ac...

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Abstract

The invention discloses a bimodal molecular weight distributed cycloolefin copolymer. The cycloolefin copolymer is a copolymer which is composed of a vinyl monomer and a cycloolefin monomer, the molecular weight distribution (MWD) is in a bimodal distributing manner; the cycloolefin is one or more of norbornene, vinyl norbornene, ethylidene norbornene, norbornadiene, and dicyclopentadiene. The MWD of the copolymer is between 15 to 35. The invention also simultaneously discloses a preparation method of the bimodal molecular weight distributed cycloolefin copolymer.

Description

technical field [0001] The invention relates to a bimodal molecular weight distribution cycloolefin copolymer and a preparation method thereof, in particular to a method for preparing a bimodal molecular weight distribution cycloolefin copolymer by solution polymerization. Background technique [0002] Cyclic-Olefin Copolymers, referred to as C°C (Cyclic-Olefin Copolymers), are a class of high value-added thermoplastic engineering plastics that are copolymerized from cyclic olefins. Due to its high transparency, extremely low dielectric constant, excellent moisture barrier, heat resistance, chemical stability and dimensional stability, it has been widely used in the manufacture of various optical lenses, automotive headlights, LCD Components, electronic and electrical components, pharmaceutical and food packaging materials, etc. [0003] The early cycloolefin copolymerization used Ziegler-Natta catalyst, which had very low polymerization activity. With the emergence of meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F232/08C08F210/02C08F4/6592
CPCC08F4/65925C08F232/08C08F2500/05C08F210/02
Inventor 曹堃姚臻肖智贤谢冰马达锋王祖飞
Owner ZHEJIANG UNIV
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