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Compound initiating agent for polymerization reaction and application thereof

A composite initiator and polymerization technology, applied in the field of organic chemistry, can solve the problems of unsatisfactory ultraviolet blocking effect, no technical prompts, low initiator efficiency, etc., to reduce steric hindrance, widen the absorption range, The effect of improving the absorption effect

Inactive Publication Date: 2011-09-14
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liu Xiaoguo et al published in 2004 "Nano C 60 / C 70 Anti-ultraviolet aging modification of acrylic acid (ester) copolymers" mentions the use of composite initiators to initiate the copolymerization of fullerenes and acrylic acid, but this article neither defines the composite initiators used nor gives with any technical tips
In 2006, the article "Synthesis of Derivatives and Anti-Near Infrared and Ultraviolet Properties in Waterborne Film-forming Materials" published by Guan Wenchao et al. disclosed the use of (NH 4 ) 2 S 2 o 8 As an initiator, a polymer with a blocking effect on ultraviolet rays is obtained, and the blocking effect of the polymer on ultraviolet rays gradually weakens as the wavelength increases, and the transmittance of ultraviolet rays rises from 54% at 200nm to 80% at 285nm, and to 300nm The above ultraviolet rays have almost no blocking effect, which shows that the polymer's blocking effect on ultraviolet rays is not ideal
The reason for this result may be due to the low efficiency of the selected initiator on the one hand, or because the large π-bonds of the fullerenes in the polymer backbone can only act as a barrier with pure free radical initiators. The effect of some ultraviolet rays

Method used

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  • Compound initiating agent for polymerization reaction and application thereof
  • Compound initiating agent for polymerization reaction and application thereof
  • Compound initiating agent for polymerization reaction and application thereof

Examples

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Effect test

example 1

[0015] 1. Preparation of the composite initiator of the present invention: uniformly mix 30% of cobalt acetate, 30% of benzoyl peroxide and 40% of azobisisonitrile.

[0016] 2. Preparation of nano-fullerene modified acrylic polymer:

[0017] Add 55g of n-butanol, 0.6g of polyoxyethylene ether, 1g of fullerene and 1g of composite initiator into the reactor, stir, and heat to 85°C to obtain mixture A; mix 9g of methacrylic acid, 11g of hydroxymethacrylate, 11g of hydroxyethyl methacrylate, 25g of methyl methacrylate, 33g of butyl acrylate and 21g of styrene were placed in a head tank and mixed uniformly to obtain mixture B. Raise the temperature of the reactor to 85°C, start to drop the mixture B in the elevated tank, control the temperature in the reactor to 100±3°C during the dropwise addition, finish the dropwise addition in about 4.5 hours, and continue the constant temperature reaction at 100±3°C for 3 hours Finally, titration with iodometric method showed that the iodine ...

example 2

[0021] 1. Preparation of the composite initiator of the present invention: 28% of cobalt acetate, 40% of benzoyl peroxide and 32% of azobisisonitrile are uniformly mixed.

[0022] 2. Preparation of nano-fullerene modified acrylic polymer:

[0023] 58g of n-butanol, 0.7g of polyoxyethylene ether 1g and 1.4g of composite initiator fullerene were added to the reactor, stirred, and heated to 90°C to obtain mixture A; 11g of methacrylic acid, 12g of hydroxypropyl acrylate and Put 26g of methyl methacrylate, 32g of butyl methacrylate, and 21g of acrylonitrile into the head tank and mix evenly to obtain mixture B. Raise the temperature of the reactor to 100±3°C, start to drop the mixture B in the elevated tank, control the temperature in the reactor to be 100±3°C during the dropwise addition, finish the dropwise addition in about 4 hours, and continue the constant temperature reaction at 100±3°C After 4 hours, titration with iodometric method showed that the iodine value was 0.025, ...

example 3

[0027] 1. The preparation of the composite initiator of the present invention: 32% of cobalt acetate, 33% of benzoyl peroxide and 45% of azobisisonitrile are uniformly mixed to obtain final product.

[0028] 2. Preparation of nano-fullerene modified acrylic polymer:

[0029] 59g of n-butanol, 0.8g of polyoxyethylene ether, 1g of fullerene and 1.7g of the composite initiator of the present invention were added to the reactor, stirred, and heated to 90°C to obtain mixture A; Ester, 27g methyl methacrylate, 34g butyl acrylate, and 21g isobutyl methacrylate were put into a head tank and mixed uniformly to obtain mixture B. Raise the temperature of the reactor to 100±3°C, start to drop the mixture B in the elevated tank, control the temperature in the reactor to be 100±3°C during the dropwise addition, complete the dropwise addition in about 4 hours, and continue the constant temperature reaction at 100±3°C 4 Hours later, titration with iodometric method showed that the iodine val...

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Abstract

The invention provides a compound initiating agent for polymerization reaction. The initiating agent comprises the following components in percent by weight: 20-35 percent of cobalt acetate, 40-60 percent of benzoyl peroxide and 15-25 percent of azobisisoheptonitrile. The initiating agent can not only reduce spatial barrel effect of macromolecule materials (like fullerene) and improve the polymerization efficiency, but also play a role of initiating double bond oxidation reaction, broadening the ultraviolet ray light wave absorption range of obtained polymerization products and improving the absorption effect consequently. By utilizing the initiating agent, the fullerene can be smoothly mixed into a carbon chain of an acrylic polymer, and a nano-fullerene modified acrylic polymer with an average blocking rate reaching above 80 percent on the ultraviolet ray with wavelength ranging from 250 nm to 400 nm can be acquired.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a polymerization initiator. Background technique [0002] Fullerene (Fullerene, also translated as Fullerene), also known as Buckyball or Buckyball (Buckyball), is the third crystal form of carbon after diamond and graphite discovered in 1985. It is an isotrope of carbon Alien. Fullerene is a general term for a series of atomic clusters composed of pure carbon. They are conjugated alkenes with a closed hollow spherical or ellipsoidal structure composed of non-planar five-membered rings and six-membered rings. Utilizing the super aromaticity and chemical activity produced by the large π construction of fullerene, it can be introduced into polyacrylic acid polymer materials through free radical reactions to modify acrylic acid (ester) polymers. After the fullerene is introduced into the acrylic acid (ester) polymer skeleton, a part of the large π structure participates in the pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/80C08F4/34C08F4/04C08F220/18C08F220/06C08F220/28C08F220/14C08F212/08C08F220/44C08F232/08
Inventor 刘晓国
Owner GUANGZHOU UNIVERSITY
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