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Method for improving photopolymerization conversion rate of acrylate rotor phase by using long-chain alcohol

A technology of acrylate and tetradecyl acrylate, which is applied in the field of photocuring and can solve problems such as rotor phase instability

Inactive Publication Date: 2021-12-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Previously, it was reported that tetradecyl acrylate and hexadecyl acrylate had a rotor phase, but the rotor phase was unstable and easily transformed into a crystalline phase

Method used

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  • Method for improving photopolymerization conversion rate of acrylate rotor phase by using long-chain alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Myristyl acrylate and 1% mass fraction of photoinitiator TPO-L were evenly mixed and loaded into the sample pan. The polymerization process was monitored by optical differential scanning calorimetry. Experimental conditions for the determination of polymerization kinetics by optical differential scanning calorimetry: cool down to 10°C at 2°C / min and keep warm for 5 minutes, then use a wavelength of 385nm and a light intensity of 6mW / cm 2 LED lights, polymerization time 15min. The results of optical differential scanning calorimetry showed that the conversion rate of photopolymerization reached 57%.

Embodiment 2

[0017] Myristyl acrylate and cetyl alcohol were mixed at a molar ratio of 8:2, and then the ternary mixture was mixed with 1% mass fraction of photoinitiator TPO-L and loaded into the sample pan. The polymerization process was monitored by optical differential scanning calorimetry. Experimental conditions for the determination of polymerization kinetics by optical differential scanning calorimetry: cool down to 10°C at 2°C / min and keep warm for 5 minutes, then use a wavelength of 385nm and a light intensity of 6mW / cm 2 LED lights, polymerization time 15min. The results of optical differential scanning calorimetry show that the conversion rate of photopolymerization reaches 67%, which is 10% higher than the conversion rate of pure tetradecyl acrylate system.

Embodiment 3

[0019] Myristyl acrylate and cetyl alcohol were mixed at a molar ratio of 5:5, and then the ternary mixture was mixed with 1% mass fraction of photoinitiator TPO-L and loaded into the sample pan. The polymerization process was monitored by optical differential scanning calorimetry. Experimental conditions for the determination of polymerization kinetics by optical differential scanning calorimetry: cool down to 10°C at 2°C / min and keep warm for 5 minutes, then use a wavelength of 385nm and a light intensity of 6mW / cm 2 LED lights, polymerization time 15min. The results of optical differential scanning calorimetry show that the conversion rate of photopolymerization reaches 71%, which is 14% higher than the conversion rate of pure tetradecyl acrylate system.

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Abstract

The invention belongs to the technical field of photopolymerization. Rotor phase chain type photopolymerization belongs to special solid-state polymerization, has the advantages of small curing shrinkage, insensitivity to oxygen and water vapor and the like which are not possessed by liquid-state photopolymerization, but also has defects. The biggest problem of limiting the application of solid-state photopolymerization is lower polymerization conversion rate. The rotor phase chain type photopolymerization reaction of a long-chain acrylate monomer is promoted by doping long-chain alcohol, so that the photopolymerization conversion rate is increased, and a certain reference value is provided for researching the rotor phase photopolymerization in the aspect. The method can be used for some special occasions with strict size requirements, such as the fields of photopolymerization, precise photoetching, patterning and the like of outdoor materials in winter or even in an extremely cold environment.

Description

technical field [0001] The invention relates to the field of photocuring, in particular to the photopolymerization of a mixed monomer system of long-chain organic alkenes and long-chain alcohols, and the influence of the mixed system on solid-state photopolymerization kinetics. Background technique [0002] Photopolymerization refers to the process in which monomers or liquid oligomers are polymerized to form polymers under the action of light (ultraviolet or visible light). Photopolymerization has fast reaction speed, mild conditions, less energy required, and unique time and space controllability. When the light starts, the polymerization reaction occurs immediately, and when the light stops, the reaction stops immediately, realizing time controllability; when the mask is covered for light, the part exposed to the light undergoes polymerization, and the covered part does not react, realizing space flexibility control. [0003] Due to the serious curing shrinkage of tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/18C08F2/48
CPCC08F120/18C08F2/48
Inventor 何勇毛乔巧姚淼聂俊
Owner BEIJING UNIV OF CHEM TECH