Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of chemical modification method of polymer powder

A technology of polymer and polymer particles, applied in the field of chemical modification of polymer powder

Active Publication Date: 2011-12-14
XINFENG JIANWEI CHEM INDAL
View PDF1 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing literature reports, the technology closer to the present invention is to add polymer powder to the cement mortar system, expecting to improve the flexibility or elasticity of concrete, and the process link also uses silane coupling agent to surface recycled rubber tire powder. However, it is limited to the simple physical coating of the coupling agent on the surface of the rubber powder, and does not involve surface chemical modification. The performance of the resulting concrete material should still have a large room for improvement

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
  • A kind of chemical modification method of polymer powder
  • A kind of chemical modification method of polymer powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Stir and disperse 100g of polymethylmethacrylate (PMMA) powder with an average particle size of 25μm into 300ml containing 5% diethylenetriamine (weight ratio, the same below), 15% KH-550 and 20% dilute hydrochloric acid (original concentration 15%) in diethylene glycol monomethyl ether solution. Ultrasonic treatment with 300W power for 10 minutes, then placed in a 900W power microwave generator to stir, put into the cooling water inner coil, the microwave generator works at half full power, control the temperature of the reaction system not to exceed 110°C, and react for a total of 20 minutes. The polymer powder was obtained by filtration, washed three times with ethanol (200 ml ethanol each time), and dried in vacuum. The C / Si atomic ratio on the surface of the polymer particles was determined to be 100:14.3 by XPS. Measured with a MasterSizer 2000 laser particle size analyzer (Malvern, UK), the average particle size has hardly changed and is still about 25 μm.

[0...

Embodiment 2

[0052] Stir and disperse 100g of polymethylmethacrylate (PMMA) powder with an average particle size of 5 μm into 300ml containing 5% diethylenetriamine (weight ratio, the same below), 20% diethylenetriaminopropyltrimethoxysilane (Veco A-1130) and 30% dilute hydrochloric acid (original concentration 15%) in diethylene glycol monomethyl ether solution. Ultrasonic treatment with 300W power for 10 minutes, then placed in a 900W power microwave generator to stir, put into the cooling water inner coil, the microwave generator works at 50% full power, control the temperature of the reaction system not to exceed 110°C, and react for 30 minutes in total . The polymer powder was obtained by filtration, washed three times with ethanol (200 ml ethanol each time), and dried in vacuum. The C / Si atomic ratio on the surface of the polymer particles was determined to be 100:16.2 by XPS. Measured with a MasterSizer 2000 laser particle size analyzer (Malvern, UK), the average particle size has...

Embodiment 3

[0055] Stir and disperse 100g of polymethylmethacrylate (PMMA) powder with an average particle size of 780μm into 300ml containing 5% diethylenetriamine (weight ratio, the same below), 10% N,N-bis-(triethoxy Silicon propyl) imine (G-402) and 10% dilute hydrochloric acid (original concentration 15%) in diethylene glycol monoethyl ether solution. Ultrasonic treatment with 300W power for 10 minutes, then placed in a 900W power microwave generator to stir, put into the cooling water inner coil, the microwave generator works at 80% full power, control the temperature of the reaction system not to exceed 110°C, and react for a total of 8 minutes . The polymer powder was obtained by filtration, washed three times with ethanol (200 ml ethanol each time), and dried in vacuum. The C / Si atomic ratio on the surface of the polymer particles was determined to be 100:21.5 by XPS. Measured with a MasterSizer 2000 laser particle size analyzer (Malvern, UK), the average particle size hardly c...

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
Average particle sizeaaaaaaaaaa
Apparent densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses polymer powder subjected to surface chemical grafting modification. In the polymer powder, a reactive alkoxy silane group is chemically linked to the surface of polymer powder particles, the average grain diameter of the solid particles is between 5 microns and 800 microns, and the C / Si atom proportion on the surface of the polymer particles, measured by an X-ray photoelectron spectroscopy (XPS), is 100:(6-30). The invention also discloses a preparation method of the surface modified polymer solid particles, and the method comprises microwave promoted hydrolytic condensation of a specific functional group-containing silane coupling agent in a solvent-diluted hydrochloric acid system and grafting reaction of the specific functional group to the polymer chain under microwave promotion, wherein the hydrolytic condensation of the silane coupling agent and the microwave effect can be used for improving the grafting efficiency of the surface of the polymer powder particles. The modified polymer powder prepared according to the technology provided by the invention is applied to a cement mortar system, and the impact toughness of curing concrete can be remarkably improved.

Description

technical field [0001] The invention relates to a technology for chemically modifying polymer particles, grafting an alkoxysilane coupling agent on the surface of polymer solid particles, and adopting a microwave-assisted method to promote the heterogeneous grafting reaction, that is, by means of microwave promotion , high-efficiency chemical bonding of silane coupling agents containing specific reactive functional groups to the molecular chains on the surface of polymer solid particles, to obtain polymer solid particles rich in alkoxysilane groups on the surface, so that they have surface chemical reaction functions . It belongs to the category of polymer material modification and is potentially applied in coatings, inks, adhesives, organic / inorganic composite materials and other fields. The innovation of the invention lies in the method of grafting the silane coupling agent on the surface of polymer solid particles and the microwave-assisted promotion of the solid-phase gra...

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
IPC IPC(8): C08F8/42C08J3/28C08F120/14C08F114/06C08F218/08C08F118/08C08C19/25C04B16/04C04B24/26
Inventor 杨小毛
Owner XINFENG JIANWEI CHEM INDAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com