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

Method for discriminating and modifying four-arm star-type SBS and line-type SBS for asphalt by infrared spectroscopy

A four-arm star-shaped, modified asphalt technology, which is used in the measurement of color/spectral characteristics, material analysis by optical means, and measuring devices, can solve the problem of high price of the four-arm star-shaped SBS, and achieve accurate and reliable judgment results. High reliability, high sensitivity and good reproducibility

Inactive Publication Date: 2015-05-20
ZHEJIANG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the price of four-arm star SBS is more expensive
At present, there is no report on the analytical method for discriminating the molecular segment structure of SBS for modified asphalt

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for discriminating and modifying four-arm star-type SBS and line-type SBS for asphalt by infrared spectroscopy
  • Method for discriminating and modifying four-arm star-type SBS and line-type SBS for asphalt by infrared spectroscopy
  • Method for discriminating and modifying four-arm star-type SBS and line-type SBS for asphalt by infrared spectroscopy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Determination of sample 1:

[0026] It is known that sample 1 is a linear SBS of model D1101. Completely dissolve the sample of test material 1 in chloroform; evenly coat the chloroform solution dissolved in test material 1 on the surface of the potassium bromide salt tablet; dry the potassium bromide salt tablet at 80°C for 20 minutes; Potassium salt tablets at 4000-400cm -1 Infrared transmission spectra averaged over 10 scans in the range (e.g. figure 1 shown); calculated transmission spectrum on the 695-705 cm -1 at and 960-972 cm -1 The relative F value of the absorption peak area at 0.6423; the calculated F value is between 0.625-0.68, which can be judged as linear SBS; it is consistent with the known conditions.

[0027] Determination of sample 2:

[0028] The known test material 2 is a linear SBS of model YH-791-H. Dissolve the sample of test material 2 completely in carbon tetrachloride; evenly coat the carbon tetrachloride solution dissolved in test mater...

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

No PUM Login to View More

Abstract

The invention discloses a method for discriminating and modifying four-arm star-type SBS and line-type SBS for asphalt by infrared spectroscopy. A transmitted spectrum of SBS is obtained by a Fourier transform infrared spectrometer, and a relative ratio of characteristic infrared absorption peak belonging to a styrene chain segment in an SBS molecule on a transmitted spectrum to characteristic infrared absorption peak belonging to a butadiene chain segment in the SBS molecule; the SBS with a calculated F value between 0.55 and 0.62 is the four-arm star-type SBS; and the SBS with the calculated F value between 0.625 and 0.68 is the four-arm star-type SBS The method of the invention uses a general infrared transmitted spectrum testing technology, can rapidly and accurately discriminating the molecular chain segment structure of the SBS, and has advantages of simple manufacturing process, accuracy and credible determination result, high sensitivity and good reappearance.

Description

technical field [0001] The invention relates to a method for discriminating the molecular segment structure of SBS, in particular to a method for discriminating four-arm star SBS and linear SBS for modified asphalt by infrared spectrum. Background technique [0002] SBS is a styrene-butadiene-styrene block copolymer prepared by anionic polymerization with butadiene and styrene as monomers, which belongs to thermoplastic rubber. SBS has the advantages of excellent tensile strength, large surface friction coefficient, and good low-temperature performance. It is widely used in shoemaking, plastic modification, asphalt modification, adhesives, cables, device parts and other fields. [0003] In the application field of asphalt modification, SBS stands out among many modifiers, mainly because SBS has the following characteristics: firstly, it can meet the requirements of high temperature performance and low temperature performance; secondly, it can be used for light duty The road...

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): G01N21/35G01N21/3563
Inventor 岳林海刘清金达莱刘瑞瑞陈怡
Owner ZHEJIANG UNIV