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Beta-cyclodextrin/styrene-butadiene-styrene triblock copolymer modified asphalt and preparation method thereof

A technology of copolymer modification and styrene, applied in building structures, building components, building insulation materials, etc., can solve the problems of unstable performance, three-dimensional network breakage, degradation, etc., and achieves low price, simple process, and difficult the effect of reunion

Inactive Publication Date: 2021-04-30
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Relevant studies have shown that SBS modified asphalt still has unstable performance during use. For example, SBS will absorb light components in asphalt and form a three-dimensional network structure, thereby improving the performance of modified asphalt. After being exposed to ultraviolet light, it will degrade and the three-dimensional network will be destroyed

Method used

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  • Beta-cyclodextrin/styrene-butadiene-styrene triblock copolymer modified asphalt and preparation method thereof
  • Beta-cyclodextrin/styrene-butadiene-styrene triblock copolymer modified asphalt and preparation method thereof
  • Beta-cyclodextrin/styrene-butadiene-styrene triblock copolymer modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 300g of 90 # Melt the base asphalt in a 500mL beaker, put the beaker into a well-type sand bath heating furnace, the processing temperature is 155°C, put the shearer into the base asphalt, adjust the speed to 3500rpm, weigh 12g of SBS and add it to the base asphalt Shear dispersion, the addition time is 5min.

[0048] Weigh 3g of β-CD and pour it into a beaker filled with 9g of DMF. Heat the mixed solution in a water bath at 75°C with constant stirring. When there are no more solid substances in the mixed solution, pour it into the prefabricated SBS modified asphalt , using a high-speed shearing machine to shear for 50 minutes, the shearing speed is 3500 rpm, and the shearing temperature is 155°C. After the shearing is completed, the shearing machine is taken out, and the modified asphalt is put into an oven at 170°C to develop for 60 minutes, and the β-CD / SBS modified asphalt of the present invention is obtained.

[0049] Utilize the fluorescence microscope to observ...

Embodiment 2

[0051] 400g of 90 # Melt the base asphalt in a 500mL beaker, put the beaker into a well-type sand bath heating furnace, the processing temperature is 160°C, put the shearer into the base asphalt, adjust the speed to 3750rpm, weigh 16g of SBS and add it to the base asphalt Shear dispersion, the addition time is 7min.

[0052] Weigh 12g of β-CD and pour it into a beaker filled with 36g of DMF. Heat the mixed solution in a water bath at 80°C with constant stirring. When there are no more solid substances in the mixed solution, pour it into the prefabricated SBS modified asphalt In the process, the high-speed shearing machine was used to shear for 60 minutes, the shearing speed was 3750 rpm, and the shearing temperature was 160°C. After the shearing is completed, the shearing machine is taken out, and the modified asphalt is put into an oven at 165°C to develop for 60 minutes, and the β-CD / SBS modified asphalt of the present invention is obtained.

[0053] At this point, the SBS...

Embodiment 3

[0055] Melt 500g of 90# base asphalt in a 600mL beaker, put the beaker into a well-type sand bath heating furnace, the processing temperature is 165°C, put the shearer into the base asphalt, adjust the speed to 4000rpm, and weigh 20g of SBS Add to the base asphalt for shear dispersion, and the adding time is 10 minutes.

[0056] Weigh 25g of β-CD and pour it into a beaker filled with 75g of DMF. Heat the mixed solution in a water bath at 80°C with constant stirring. When there are no more solid substances in the mixed solution, pour it into the prefabricated SBS modified asphalt In the process, the high-speed shearing machine was used to shear for 55 minutes, the shearing speed was 4000 rpm, and the shearing temperature was 165°C. After the shearing is completed, take out the shearing machine, and put the modified asphalt in an oven at 170°C for 70 minutes to obtain β-CD / SBS modified asphalt.

[0057] The rheological characteristic curve of embodiment 3 gained β-CD / SBS modifi...

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Abstract

The invention discloses beta-cyclodextrin / styrene-butadiene-styrene triblock copolymer modified asphalt and a preparation method thereof, and belongs to the technical field of building materials. The preparation method comprises the following steps: uniformly dispersing a beta-cyclodextrin solution into styrene-butadiene-styrene triblock copolymer modified asphalt to obtain a mixture, and carrying out shearing treatment and development treatment on the obtained mixture to obtain the beta-cyclodextrin / styrene-butadiene-styrene triblock copolymer modified asphalt. The preparation method disclosed by the invention can be used for processing on the basis of an original processing technology, is safe to operate and is suitable for expanded production and popularization. By combining the performance advantages of the styrene-butadiene-styrene triblock copolymer and the beta -cyclodextrin, the prepared beta -cyclodextrin / styrene-butadiene-styrene triblock copolymer modified asphalt has the characteristics of better high-temperature stability and low-temperature cracking resistance, excellent storage stability and outstanding thermo-oxidative aging resistance.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a β-cyclodextrin / styrene-butadiene-styrene triblock copolymer modified asphalt and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. Asphalt can be mainly divided into three types: coal tar pitch, petroleum pitch and natural pitch. Asphalt that has not been modified is called base asphalt. Because base asphalt often has poor high-temperature stability and rutting resistance, and is easy to crack in low-temperature environments, it is necessary to modify base asphalt in road engineering. Polymer (polyethylene, polypropylene, polystyrene butadiene copolymer, ethylene-vinyl acetate copolymer, etc.) modified asphalt, as an important modified asphalt, is widely used in the field of road engineering and waterproof engineering It is also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L5/16
CPCC08L95/00C08L2205/03C08L2201/08C08L53/02C08L5/16
Inventor 程有亮韩涵之方长青
Owner XIAN UNIV OF TECH
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