Unlock instant, AI-driven research and patent intelligence for your innovation.

Grading separation method of conjugated polyphenylacetylene kind polymer

A polyphenylene vinylene and fractional separation technology, applied in solid solvent extraction and other directions, can solve problems such as chemical purity and dispersion index intractable

Inactive Publication Date: 2010-02-03
徐良衡
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the current research, the physical impurities of light-emitting polymers are relatively easy to remove, while the effects of chemical purity and dispersion index are more difficult to deal with

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, 10 g of MEHPPV (polymethoxyhexyloxyphenyl acetylene) materials with a weight average molecular weight of 1 million and a dispersion of 4.0 are dissolved in 90 grams of tetrahydrofuran solvent, and 0.1 g of polyalcohol surfactant is added dropwise and stirred. until all dissolved. 5g, 10g, 15g, 20g, 25g, 30g, 35g, 40g, 45g of ethyl acetate were added dropwise until dissolved and turned pale red. Each dropwise addition of precipitate is a fraction. As shown in Table 1. Nine fractions were obtained, plus one fraction was obtained after the remaining solution was treated under reduced pressure, and a total of ten fractions were 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, respectively. The weight-average molecular weight and degree of dispersion measured by GPC are as follows respectively:

[0033] Table 1 Molecular weight and dispersity of graded fractions

[0034]

Embodiment 2

[0036] The experimental process is as described in Example 1. After mixing the solutions of 1, 2, 3, 4, 5, 6, 7, 7, 8, 9, and 10, the corresponding a, b, c, and d were respectively obtained. , e, f, g, h large fractions, the GPC test results are shown in Table 2.

[0037] Table 2 Molecular weight and dispersity of graded fractions

[0038] Fraction

[0039] Compared with Table 1, it is found that the dispersion degree of the large fraction after mixing is not greatly damaged, and is still relatively small. And the smaller the molecular weight, the greater the dispersion of the large fraction. Conversely, the smaller.

Embodiment 3

[0041] At room temperature, 10 g of MEHPPV (the same batch as in Example 1) with a weight-average molecular weight of 1 million and a degree of dispersion of 4.0 was dissolved in 90 grams of tetrahydrofuran solvent, and 0.1 g of polyalcohol surfactant was added dropwise and stirred until all dissolve. 10g, 20g, 30g, 40g of ethyl acetate were added dropwise until the solution turned pale red. Each dropwise addition of precipitate is a fraction. As shown in Table 3. Four fractions were obtained, and one fraction was obtained after depressurizing the remaining solution, and there were five fractions in total, namely a, b, c, d, and e. The weight-average molecular weight and degree of dispersion measured by GPC are as follows respectively:

[0042] Table 3 Molecular weight and dispersity of graded fractions

[0043] Fraction

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
dispersityaaaaaaaaaa
dispersityaaaaaaaaaa
dispersityaaaaaaaaaa
Login to View More

Abstract

A process fo classifying the conjugated polyphenylacetylene polymers used for electroluminescent material features that the polar solvent (alcohol, ester, or their mixture) and / or nonpolar solvent (ether, arylhydrocarbon, or halohydrocarbon) are gradually added to said polymers to dissolve them class byclass from low molecular weight to high one, so separating them.

Description

technical field [0001] The invention belongs to the technical field of electroluminescent materials, and in particular relates to a method for fractionating and separating conjugated polyphenylene vinylene polymers. technical background [0002] With the deepening of research on polymer light-emitting displays, it is increasingly found that the purity and dispersion index of polymer light-emitting materials have a significant impact on the life, chromaticity, brightness, and efficiency of polymer light-emitting devices, and at the same time restrict the Development of emissive displays. [0003] Polymer luminescent material is a kind of semiconducting polymer material. For small molecule organic materials, its purity has been developed to electronic grade materials, that is, the purity of small molecule organic materials is required to be more than five nines. For polymers, there is currently no unified standard. In the research field of polymer luminescent materials, to j...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F138/00C08F6/28B01D11/02B01D71/10
Inventor 徐良衡李想姚红兵高芸
Owner 徐良衡