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A kind of method for detecting the position of grafting group in block polymer

A technology of block copolymers and groups, applied in the direction of color/spectral characteristic measurement, etc., to achieve the effect of high resolution, good repeatability and high reliability

Active Publication Date: 2016-01-06
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of existing techniques for detecting the location of grafted groups in polymers with complex structures, the purpose of the present invention is to provide a method for detecting grafted groups in block copolymers by utilizing a disturbance correlation moving window two-dimensional correlation spectroscopy technique. The location method, which is a detection method with high resolution, good repeatability and stable detection results

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  • A kind of method for detecting the position of grafting group in block polymer
  • A kind of method for detecting the position of grafting group in block polymer
  • A kind of method for detecting the position of grafting group in block polymer

Examples

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Embodiment 1

[0027] The graft-modified functional elastomer hydrogenated styrene-butadiene block copolymer grafted maleic anhydride (SEBS-g-MAH) was prepared by our laboratory-made ultrasonic melt extrusion integrated equipment. SEBS-g-MAH is similar to hydrogenated styrene butadiene block copolymer (SEBS), it also has hard segment and soft segment, the hard segment and soft segment are defined as S segment and EB segment respectively, and the corresponding phase region is defined It is S phase and EB phase.

[0028] In the first step, about 2g of the test sample is dissolved in xylene, heated and dissolved for 0.5h, poured into acetone to collect the precipitate, and then extracted in boiling acetone for 8h to obtain fully purified SEBS-g-MAH, the purified SEBS-g-MAH obtained by extraction The material was dried in an oven at 80 °C for 24 h. Then by acid-base titration, it is determined that the grafting rate is 0.96%, and the purified product is dissolved in xylene, and its concentratio...

Embodiment 2

[0035] Hydrogenated styrene-butadiene block copolymer (SEBS) grafted with maleic anhydride was prepared in a melt extrusion process using dicumyl peroxide as an initiator. Hydrogenated styrene butadiene block copolymer grafted maleic anhydride (SEBS-g-MAH) is similar to SEBS in that it also has hard and soft segments, which are defined as S segment and EB segment respectively. The phase region is defined as S phase and EB phase.

[0036] In the first step, about 2g of the test sample is dissolved in xylene, heated and dissolved for 0.5h, poured into acetone to collect the precipitate, and then extracted in boiling acetone for 8h to obtain fully purified SEBS-g-MAH, the purified SEBS-g-MAH obtained by extraction The material was dried in an oven at 80 °C for 24 h. Then by acid-base titration, it is determined that the grafting rate is 0.96%, and the purified product is dissolved in xylene, and its concentration is 20g / L, which is used as a test sample for subsequent use;

[0...

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Abstract

The invention relates to a method for detecting the location of grafted groups in block polymers. It is based on the information about the position of the group obtained from the differences in the aggregation state and chemical structure of each component in the polymer structure with a complex structure. In the detection process, give the experimental system a certain external disturbance, collect a series of spectral lines, and then analyze the spectral data through the two-dimensional correlation method of the disturbance correlation moving window, and analyze the response behavior of each component and the response behavior of the characteristic grafting group. From this, it can be obtained whether the characteristic grafting group is consistent with the response information of a certain component or group, and then through further judgment, the information on the location of the characteristic grafting group can be obtained. The invention is applicable to the detection of grafted groups in polymer systems with complex chemical and aggregate structures, and has high resolution, good repeatability, stable detection results, simple operation, and has popularization and application value.

Description

technical field [0001] The invention relates to the detection field of macromolecular materials, and more specifically relates to a method for detecting the location of graft groups in polymers. Background technique [0002] The alloying of polymer materials endows polymer materials with new properties to meet the rapid development of modern science and technology, and has received extensive attention. During the alloying process of polymer materials, the interaction between multiphase and multicomponent interfaces plays a decisive role in the performance of polymer material alloys. In order to enhance the interaction between multiphase and multicomponent interfaces, functional materials that have a compatibilizing effect on polymer multiphase and multicomponent systems are usually added to reduce interfacial tension and improve the interaction between interfaces. Compatibility functional materials are usually graft-modified polymer functional materials such as maleic anhyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 吴宏张先龙郭少云
Owner SICHUAN UNIV