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Method for evaluating relative content of silane coupling agent polymer

A technology of silane coupling agent and relative content, which is applied in measurement devices, instruments, and analysis by nuclear magnetic resonance, etc., to achieve the effects of good repeatability and stability, improved process, and low detection cost

Active Publication Date: 2020-03-27
南京曙光新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Technical problem: the purpose of this invention is to establish a method for evaluating the relative content of silane coupling agent polymers, especially a detection method suitable for daily production monitoring needs. The method is simple and fast to operate, low in detection cost, and easy to The promotion and application have solved the problems that have plagued silane coupling agent manufacturers and users for a long time

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  • Method for evaluating relative content of silane coupling agent polymer

Examples

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Effect test

Embodiment 1

[0043] Select a group of "bis(3-propyltriethoxysilane) tetrasulfide" samples, do liquid phase detection and density index detection according to the method of GB / T 30309-2013, and determine the average sulfur chain length and density data. Five samples with similar average sulfur chain lengths and significantly different densities were selected as a set of standard samples.

[0044] The relative content of polymers in this group of bis(propyltriethoxysilane) tetrasulfide standard samples was analyzed by using the method of nuclear magnetic resonance silicon spectrum and hexamethyldisiloxane as a reference. Get the following data:

[0045] Table 1 polymer content

[0046] project 1# standard sample 2# standard sample 3# standard sample 4# standard sample 5# standard sample polymer content 0.012％ 0.107％ 1.132％ 5.201％ 10.007％

[0047] The above five standard samples were prepared into ethanol solution with ethanol according to the volume ratio ...

Embodiment 2

[0055] Select a group of "bis(3-propyltriethoxysilane) trisulfide" samples, do liquid phase detection and density index detection according to the method of GB / T 30309-2013, and determine the average sulfur chain length and density data. Six samples with similar average sulfur chain lengths and significantly different densities were selected as a set of standard samples.

[0056] The relative content of polymers in this group of bis(propyltriethoxysilane) trisulfide standard samples was analyzed by using the method of nuclear magnetic resonance silicon spectrum and hexamethyldisiloxane as a reference. Get the following data:

[0057] Table 3 polymer content

[0058] project 1# standard sample 2# standard sample 3# standard sample 4# standard sample 5# standard sample 6# standard sample polymer content 0.02％ 0.22％ 2.16％ 10.09％ 15.37％ 20.29％

[0059] The above 6 standard samples were prepared into ethanol solution with ethanol according to ...

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Abstract

The invention provides a method for evaluating the relative content of a silane coupling agent polymer. The method comprises the following steps: a) testing a silane coupling agent by using a nuclearmagnetic resonance silicon spectrum method to obtain the relative content of the silane coupling agent polymer; b) preparing a silane coupling agent into ethanol or an aqueous solution, and testing byusing a turbidity meter to obtain a turbidity value X1; c) establishing a 'turbidity-polymer relative content' standard curve by taking the turbidity value as an X axis and taking the silane couplingagent polymer relative content value as a Y axis; d) preparing a to-be-tested sample into ethanol or an aqueous solution, and testing to obtain a turbidity value X2 of the to-be-tested sample; and e)corresponding the turbidity value X2 of the to-be-tested sample to the X-axis data on the standard curve, and finding out the Y-axis value corresponding to the point, namely the value of the relativecontent of the polymer of the to-be-tested sample. According to the method, the relative content of the polymer in the sample can be relatively accurately measured by establishing a standard curve ofturbidity numerical value-relative content numerical value of the polymer.

Description

technical field [0001] The invention relates to a method for evaluating the relative content of a silane coupling agent polymer, which belongs to the technical field of chemical industry. Background technique [0002] Silane coupling agents have hydrolyzable groups, such as alkoxy groups, chlorine groups, etc., which are easily hydrolyzed to generate Si-OH, and then condense with inorganic substances to form Si-O-Si chemical bonds or hydrogen bonds (covalent bonds ), to build a bridge between organic matter and inorganic matter by chemical bonds or covalent bonds, thus acting as a coupling agent. [0003] Because the silane coupling agent has easily hydrolyzed groups, it will inevitably encounter water or humid air during its raw material source, production and storage process, causing the hydrolyzable groups to be hydrolyzed to form Si-OH groups Monomers containing Si-OH groups tend to undergo self-polymerization-condensation reactions to form polymers, which are unexpecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08G01N33/00
CPCG01N24/08G01N33/00Y02A90/30
Inventor 陶再山李春华
Owner 南京曙光新材料有限公司
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