mixing PP/carbon 4

[finfin11]

I need to mixing PP with carbon, but composition of PP < 10 %wt. will be prepared with different percentages PP–carbon 6:94 and 8:92. whether it can be formed into a rectangular plate? Please tell me, how about the procedure?
do I need a solvent for PP? does anybody know a good solvent for PP?

thanks

 

[patprimmer]

By PP i guess you mean polypropylene. If so, no, there are no solvents.

What do you mean by carbon. It comes in many forms, however I doubt that polypropylene can we it out at that quantity if mixed with molten polypropylene.


Regards
Pat
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[finfin11]

Hi Pat,
thanks for your answer
I will mixing polypropylene + carbon black powder, but composition of PP < 10 %wt. will be prepared with different percentages PP–carbon black powder 6:94 and 8:92. whether it can be formed into a rectangular plate?
Please tell me, how about the procedure and method?

 

[patprimmer]

I think I already said it can't be done.

I think for carbon black it is probably difficult to get more than 40% into PP. Maybe less.

The method is usually feeding both materials into a twin screw extruderthat melts the PP and mixes the carbon powder into the melted PP

Regards
Pat
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[Compositepro]

I think the only chance you have to make make such a material is to start with PP powder with a particle size of 5 micron or less, blend the powders together and compression mold at high pressure and temperature.

 

[Demon3]

Another way to put this is to go to the kitchen and weight out 95g flour. Add 5g water and try to mix that into a paste. You'll need more fluid phase.

Chris DeArmitt - PhD FRSC CChem
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[patprimmer]

CP at 5% there still will not be enough volume of PP to form a binder to stick the carbon particles together.

Regards
Pat
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[patprimmer]

Chris

Your example is perfect.

Regards
Pat
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[Demon3]

Hi Pat,

Thanks! A compliment indeed coming from you. My mind works in simple terms like that. Easier to relate to than equations and obscure theories.

Chris

Chris DeArmitt - PhD FRSC CChem
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[Compositepro]

5% is a very common binder level when simply binding particles together. It will simply not be as strong as a mixture with more binder. The OP has said nothing about the purpose of his plate. Carbon black can be pressed into a plate without any binder (as can flour, for that matter).

 

[Pud]

(as can flour, for that matter).

Sounds like my wife's pastry!

H

www.tynevalleyplastics.co.uk

It's ok to soar like an eagle, but weasels don't get sucked into jet engines.

 

[patprimmer]

Harry

It sounds like rumors of you impending divorce where not exaggerated. ;-)

Regards
Pat
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[Demon3]

It is possible to dissolve PP. For example when you want to measure the molecular weight by GPC they heat it in trichlorobenzene to dissolve it.

http://www.intertek.com/polymers/testing/ht-gpc/

In some work I did we avoided chlorinated solvents and used a MARSX Microwave oven accelerated reaction system for extraction from CEM where the solvent was 25 ml of a 30% n-Hexane, 70% Ethyl-acetate.

I am not 100% sure that dissolved the PP, it did definitely swell it.

Chris DeArmitt - PhD FRSC CChem
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[graphenetracker]

What is the purpose of the mixture though? If you just need to make the carbon flexible, maybe you can use a form of graphene?

Marko Spasenovic
www.graphenetracker.com

 

[finfin11]

thanks for all
I will try your suggestion
and I still receive more suggestions