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Catalytic system for catalyzing the polymerization of polar vinyl monomers

A technology of vinyl monomer and catalytic system, applied in the field of catalytic system, can solve the problems of increasing the cost of catalytic system, unable to obtain unsaturated vinyl polymer, etc., and achieve the effect of low cost

Active Publication Date: 2016-10-19
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Free radical polymerization is the most commonly used method in industry, but this polymerization method has obvious disadvantages when preparing unsaturated polar vinyl polymers: 1) usually the polymer obtained has a wide molecular weight distribution; 2 ) When there are unsaturated bonds in the polymer, crosslinking will occur, and unsaturated vinyl polymers cannot be obtained
This necessarily increases the cost of the catalytic system, so new polymerization systems that do not require the synthesis of ketene acetal are desired

Method used

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  • Catalytic system for catalyzing the polymerization of polar vinyl monomers
  • Catalytic system for catalyzing the polymerization of polar vinyl monomers
  • Catalytic system for catalyzing the polymerization of polar vinyl monomers

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In a 20 ml reaction flask with a stirring bar, 11.6 mg of triethylsilane (Et 3 SiH), 1.0 g of methyl methacrylate, 5 ml of fluorobenzene, stirred for 5 minutes, then added 88.3 mg of [Et 3 Si][B(C 6 f 5 ) 4 ]·C 7 h 8 Polymerization begins. The reaction was carried out at 20°C for 1 hour. After the reaction was completed, 2 drops of methanol solution containing 10% hydrochloric acid were added to terminate the reaction. The polymer was poured into 200 ml of methanol (containing 10% hydrochloric acid), and stirred for 1 hour. The polymer was collected by filtration, washed three times with 20 ml of methanol each time, and then dried in a vacuum oven at 50° C. to constant weight to obtain 1.0 g of polymer with a yield of 100%. Gel chromatography analysis gained polymethyl methacrylate M n = 10400, PDI = 1.10.

[0026] See Table 1-5 for other application examples

[0027] Table 1 Application examples of different initiators

[0028]

[0029]

[0030] * No...

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Abstract

The invention provides a catalysis system of a polymerized polar vinyl monomer. The catalysis system is formed by taking an initiating agent with a molecular formula of R'R''R'' 'SiH and silicon salt with a general formula of [R'R''R'' 'Si][R'R''R'' 'SiH]m[BR1R2R3R4].nL as catalysts. The general formula of the polar vinyl monomer is CH2=CRX, such as methyl methacrylate and N,N'-dimethylacrylamide. The catalysis system provided by the invention has the beneficial effects of being low in cost, controlling the molecular weight of a polymer and preparing the polymer with unsaturated carbon-carbon double bonds.

Description

technical field [0001] The invention discloses a catalytic system for catalyzing the polymerization of polar vinyl monomers. Background technique [0002] Polar vinyl polymers are vinyl polymers with polar groups as side chains. This type of compound has many excellent properties and is widely used in people's production and life. For example, polymethyl methacrylate (plexiglass) and polyacrylamide polymers are products that people often encounter in their daily lives. [0003] Polar vinyl polymers are obtained through the polymerization of polar vinyl monomers. Polymerization methods include: free radical polymerization, anionic polymerization, metal complex polymerization, steric hindered Lewis acid-base polymerization and group transfer polymerization. Free radical polymerization is the most commonly used method in industry, but this polymerization method has obvious disadvantages when preparing unsaturated polar vinyl polymers: 1) usually the polymer obtained has a wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/14C08F120/18C08F126/06C08F120/54C08F120/40C08F4/42
Inventor 徐铁齐
Owner DALIAN UNIV OF TECH
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