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Spoke noise reduction damping polymer material and preparation method thereof

A polymer material and noise reduction technology, applied in the field of polymer damping material manufacturing, can solve the problem of polyurethane not showing heat storage performance, etc., and achieve the effects of high saturated vapor pressure, good damping performance, and non-volatile

Inactive Publication Date: 2012-07-11
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There has been a lot of research on multi-block polyurethanes, but people have focused more on its thermoplastic elastomer properties, so these polyurethanes do not show heat storage properties

Method used

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  • Spoke noise reduction damping polymer material and preparation method thereof
  • Spoke noise reduction damping polymer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] PU / PA (polyurethane / polyacrylate) samples were prepared by two-step solution polymerization. Add PEG (high molecular weight polyethylene glycol, 25g) that has been vacuum dehydrated at 100°C for 3.5h into an appropriate amount of DMF (dimethylformamide, 60ml), stir and dissolve, then add metered MDI (diphenylmethane diisocyanate , 23 g), at N 2 Under protection, react at 60°C for 2.5h to generate NCOPEG prepolymer. At 2.5 hours, take a sample of 1-2g and measure the NCO value in the conical flask with the di-n-butylamine method. Add and measure BDO (butanediol, 8 grams) according to the measured NCO value, and after the chain extension reaction for 2 hours, stir at high speed Add acrylate monomer (containing 0.9% dissolved initiator AIBN, 42 grams in total), the reaction temperature is controlled at 70° C., and the monomer addition is completed within 1.5 hours. Additional initiator AIBN (0.05% of the total amount of acrylic ester monomers) was added, and after the ad...

Embodiment 2

[0021] PU / PA (polyurethane / polyacrylate) samples were prepared by two-step solution polymerization. Add PEG (high molecular weight polyethylene glycol, 32.5g) that has been dehydrated under vacuum for 4 hours at 110°C to an appropriate amount of DMF (dimethylformamide, 80ml), stir and dissolve, then add metered MDI (diphenylmethane diisocyanate , 29.5 g), at N 2 Under protection, react at 65°C for 2.5h to generate NCOPEG prepolymer. At 2.5 hours, take a sample of 1-2 g and measure the NCO value in a conical flask with the di-n-butylamine method. Add and measure BDO (butanediol, 11.5 grams) according to the NCO value measured, after chain extension reaction 2.5h, acrylic ester monomer (containing 0.9% initiator AIBN of dissolving, total 51 grams) is stirred dropwise at high speed , the reaction temperature was controlled at 75°C, and the monomer addition was completed within 2 hours. Additional initiator AIBN (0.05% of the total amount of acrylic monomers) was added, and aft...

Embodiment 3

[0023] PU / PA (polyurethane / polyacrylate) samples were prepared by two-step solution polymerization. Add PEG (high molecular weight polyethylene glycol, 40g) that has been dehydrated under vacuum for 5 hours at 120°C to an appropriate amount of DMF (dimethylformamide, 100ml), stir and dissolve, then add metered MDI (diphenylmethane diisocyanate, 36 g), at N 2 Under protection, react at 70°C for 2.5h to generate NCOPEG prepolymer. At 2.5h, take a sample of 1-2g and measure the NCO value in the conical flask with the di-n-butylamine method. Add and measure BDO (butanediol, 15 grams) according to the measured NCO value, and after the chain extension reaction for 3 hours, stir at high speed and drop Add acrylate monomer (containing 0.9% dissolved initiator AIBN, 60 grams in total), the reaction temperature is controlled at 80° C., and the monomer addition is completed within 2.5 hours. Additional initiator AIBN (0.05% of the total amount of acrylic ester monomers) was added, and ...

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Abstract

The invention discloses a spoke noise reduction damping polymer material and a preparation method thereof. The preparation method comprises the following steps of: adding polyethyleneglycol (PEG) into proper amount of dimethyl formamide (DMF), stirring, dissolving, adding metered diphenyl-methane-diisocyanate (MDI), and generating an isocyanate polyethyleneglycol (NCOPEG) prepolymer under the protection of N2; adding metered butanediol (BDO) according to an NCO measuring value, performing chain extension reaction for 2 hours, stirring at a high speed, and dripping an acrylate monomer (which contains 0.9 percent of dissolved initiator); adding the initiator, heating to the temperature of 3 DEG C, performing heat-insulating reaction for 2.5 hours to prepare a polyurethane (PU) / polyacrylate (PA) spoke noise reduction damping polymer of which the mass ratio of raw materials of the BDO to the MDI to the PEG to the acrylate monomer to the DMF is 1:2.86:3.16:5.25:7; and pouring the PU / PA spoke noise reduction damping polymer into a die, keeping in a vacuum drying oven at the temperature of 80 DEG C for 48 hours to obtain the spoke noise reduction damping polymer material. The method is environment-friendly and low in toxicity; and the spoke noise reduction damping polymer material does not contain harmful substances before being cured or after being cured and has the excellent damping performance; a loss factor tangent delta is the highest at the temperature of 30 DEG C, and the maximum value tangent delta max is equal to 0.723; the loss factor tangent delta is the lowest at the temperature of between 50 and 60 DEG C, and the minimum value tangent delta min is equal to 0.537; and the temperature field range is between -40 and 65 DEG C.

Description

technical field [0001] The invention belongs to the field of high molecular polymers, especially the manufacture of polymer damping materials. Background technique [0002] Polymer damping material (interpenetrating polymer network damping material) is a functional material for reducing vibration and noise. The damping material synthesized by IPN technology is called damping IPN material. Its damping performance mainly depends on the glass transition behavior of each component and the interaction and mutual influence between components, which is mainly reflected in the compatibility between components. It is precisely because the components are in a semi-compatible state that the range of the glass transition temperature (Tg) of the system can be broadened. Due to the interpenetrating interaction between networks in IPN, the size of phase domains is limited and the formation of multiphase structures can be promoted. The size of phase domains in IPN is very small, only 10-1...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L33/04C08G18/76C08G18/66C08G18/48C08G18/32
Inventor 易锦胥永刚宋国晶刘美菊陈晓刚陈博
Owner SOUTHWEST JIAOTONG UNIV
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