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Silver halide based photoinitiator and application thereof to light-induction unsaturated olefin monomer polymerization

A photoinitiator and olefin monomer technology, which is applied in the field of photoinitiated polymer polymerization, can solve the problems of high price, large volume shrinkage, and slow curing speed, and achieve fast reaction speed, mild reaction conditions, and anti-aggregation effects

Inactive Publication Date: 2014-05-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Free radical photoinitiators are susceptible to the inhibition of oxygen in the process of initiating the polymerization reaction, and the volume shrinks after curing, while cationic photoinitiators generally have slower curing speeds, less applicable monomers and oligomers, and generally more expensive

Method used

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  • Silver halide based photoinitiator and application thereof to light-induction unsaturated olefin monomer polymerization
  • Silver halide based photoinitiator and application thereof to light-induction unsaturated olefin monomer polymerization
  • Silver halide based photoinitiator and application thereof to light-induction unsaturated olefin monomer polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] With 1wt% sorbitan monooleate polyoxyethylene ether (Tween80) aqueous solution, 0.067wt% CaCl 2 Aqueous solution, 0.25wt%AgNO 3 The aqueous solution is ready for use.

[0045] Take 20ml of Tween80 aqueous solution with a concentration of 1wt%, preheat it in a water bath at 50°C for 5min, add 20ml of CaCl with a concentration of 0.067wt% 2 The aqueous solution was stirred and reacted for 30min, and AgNO with a concentration of 0.25wt% was added rapidly 3 20 ml of aqueous solution was stirred in the dark for 30 minutes to obtain AgCl colloid, which was dialyzed with ultrapure water for 1.5 hours for later use. The particle size of active AgCl particles in the AgCl colloid was 50-800 nanometers. Weigh 0.7mmol of N-isopropylacrylamide and dissolve it in 1ml of deionized water, add 10ml of the above-prepared AgCl colloid, mix and stir evenly, and pass high-purity nitrogen gas N 2 Remove the air in the tube for 30 minutes, then seal the reaction tube, place it under a 36W ...

Embodiment 2

[0049] The same method as in Example 1, wherein N-isopropylacrylamide is replaced by N-isopropylmethacrylamide, the mass of which is 0.1g, to obtain poly-N-isopropylmethacrylamide, and the conversion rate is 100%.

Embodiment 3

[0051] With 1wt% Tween-80 aqueous solution, 0.067wt% CaCl 2 Aqueous solution, 0.25wt%AgNO 3 The aqueous solution is ready for use.

[0052] Take 20ml of Tween-80 aqueous solution with a concentration of 1wt%, preheat it in a water bath at 50°C for 5min, add 20ml of CaCl with a concentration of 0.067wt% 2 The aqueous solution was stirred and reacted for 30min, and AgNO with a concentration of 0.25wt% was added rapidly 3 20 ml of aqueous solution was stirred in the dark for 30 minutes to obtain AgCl colloid, which was dialyzed with ultrapure water for 2 hours for later use. The particle size of active AgCl particles in the AgCl colloid was 50-800 nm. Get the mixed solution 14mL (V 乙醇 :V AgCl胶体 =5:1), add 0.15g polyvinylpyrrolidone (PVP) as a dispersion stabilizer, magnetically stir until fully dissolved, then add 2mL styrene, magnetically stir to form an O / W transparent microemulsion, and introduce high-purity N 2 The air in the tube was removed for 30 minutes, and then the...

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Abstract

The invention belongs to the technical field of photo-initiation polymer polymerization and particularly relates to a silver halide based photoinitiator and application of the silver halide based photoinitiator to light-induction unsaturated olefin monomer polymerization. Active silver halide based material is used as a photoinitiator, and organic polymer material is prepared through induction polymerization under ultraviolet light. Firstly, surface active agent is added into halide salt water solution, then silver nitrate solution is added under a stirring condition to perform reaction, and the active silver halide based photoinitiator is obtained through dialysis, the silver halide based photoinitiator, the unsaturated olefin monomer and water are mixed to form stable dispersion liquid, active silver halide particles in the silver halide based photoinitiator absorb ultraviolet light to generate free radical under the irradiation of an ultraviolet lamp, unsaturated olefin monomer polymerization is initiated, and then the organic polymer material is prepared. The polymerization reaction can be carried out in water phase, the using range of suitable monomers and low polymers is wide, and the silver halide based photoinitiator has the characteristics of quick reaction speed, gentle reaction condition, environment protection and the like.

Description

technical field [0001] The invention belongs to the technical field of photoinitiated polymer polymerization, and specifically relates to a silver halide-based photoinitiator and its application in light-induced polymerization of unsaturated olefin monomers. Active silver halide-based materials are used as the photoinitiator, Induced polymerization to prepare organic polymer materials. Background technique [0002] Photoinitiator is a kind of material that can absorb light energy of a certain wavelength, generate active free radicals, trigger the double bond reaction in the system to form a growing chain, and initiate monomer polymerization, crosslinking and curing. Visible photoinitiators are limited in application because they are not sensitive to sunlight and general lighting sources. Therefore, most of the currently used photoinitiators are ultraviolet photoinitiators. According to the different active intermediates produced, it can be divided into free radical type and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/48C08F2/24C08F120/54C08F112/08C08F120/06C08F120/56C08F120/14C01G5/02
Inventor 赵岩杨莹颜雨坤王艳丽张劲松
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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