Basheer AlShammari

40 Questions 87 Answers 0 Followers

Questions related from Basheer AlShammari

What are the manufactures of polymer containing carbon nano tubes ?

What is the best industrial method for manufacturing polymers containing carbon nano-tubes composites materials . if there is any existing companies dealing with such composites , please let me...

01 January 2019 9,894 3 View

What is the best way to deposit graphene sheets on the Cu sheet?

I used modified hummer method for preparing graphene from graphite, When i left the mixture 24h after refluxing , I found a very small bubble in the top of it. Can anyone please help . Also , why...

04 April 2016 6,916 6 View

Is there any difference between GNP and graphene ?

if there is a table shows their properties? thanks in advance

12 December 2014 3,860 4 View

Why two heating runs usually do in DSC , what is the difference ?

Any help please , Also, Why thermal history can removed by hold the polymer for 5 min ?

11 November 2014 8,010 5 View

How can I calculate the density of powders generally, counts in particular?

What is best way to find out density of fillers ? Please help as soon as possible

11 November 2014 973 1 View

Does impedmce NumetriQ PSM1735 measure resistance or resistiviy of the material?

thanks in advance

11 November 2014 9,236 1 View

Why is storage modulus important?

Where can use composites that have a higher storage modulus than the matrix. Please help.

11 November 2014 4,804 6 View

Why did I find double melting peak on the second heating run, but the first heat shows only one peak?

Please explain. Polymer is PET

11 November 2014 3,370 5 View

Why 120 c is usually used for the acid treatment of CNTs?

Acid is a mix from sulfric and nitric.

11 November 2014 7,394 3 View

Why nitric acid and sulfric acid used in acid treatment of Carbon nanotubes . Why not others ?

Any help please

11 November 2014 588 6 View

How can I explain chemistry of acid treatment of carbon Nanotube ?

is there any chemical reaction or formula

11 November 2014 756 10 View

Do you think carbon filelr such as graphite and CNTs will modified size crystals and how ?

please help ASAP ?

11 November 2014 7,344 0 View

Why the thermal stability of PET improved adding 2 wt.% graphite but when I increase the amount of filler there was so no much improvement?

any help please I add 2 wt.% ,5 wt.% , 10 wt.% and 15 wt.% All have similar decomposition temperature also are not in order For example , at 10 wt.% is higher than 15 wt.% ? Thanks

11 November 2014 1,537 3 View

What does storage modulus in the rubbery state tell us?

Any help please? I found 2 wt.% of CNTs in the polymer got higher storage modulus (200MPa) than lower loadings, and also lower than other carbon fillers like GNP.

11 November 2014 3,654 5 View

Why oscillatory stress is apply in DMTa ?

What does mean singke cantilever. ? Any help please

11 November 2014 8,573 0 View

What is the assumption for the percolation theory of polymer composites?

Also, if the experimental data fit good with this theory, what does it mean?

11 November 2014 6,059 4 View

What is difference between a minilab extruder and traditional extruder?

As you know traditional extruders have different temperature zones. Why? Also, how does a minilab extruder work? I will appreciate any kind help. thanks

11 November 2014 4,453 7 View

Is there any techniques to measure thermal stability of polymer instead of TGA ?

Help please

11 November 2014 6,527 6 View

Why was the melting temperature of PET in the second heating run (DSC) lower than that obtained from the first run?

Any idea please?

11 November 2014 748 5 View

What is the difference between quenching my PET or cooling it slowly?

Will the crystal size be bigger or smaller?

11 November 2014 3,181 5 View

Why do carbon fillers do not affect the melting point of polymers?

Any help please?

11 November 2014 9,462 9 View

What is the tensile modulus of CNTs and GNP?

Is 1 TP a theoretical or experimental value? Also, how can I measure this modulus? What is the effective modulus of filler in the composites? Thanks in advance.

11 November 2014 8,640 8 View

Why CNTs nuclear polymer stronger than GNP ?

Please kindly help.

11 November 2014 3,516 8 View

Why power low is used in percolution theory calculation , in particular applied after percolution theeshold values ?

Please help

11 November 2014 653 1 View

Why do thermoplastic polymer crystallize at all ?

Any help please

11 November 2014 1,047 1 View

Why does a crystallization peak get a border with increasing amount of filler in the polymer composite?

Any kind help please

11 November 2014 1,020 13 View

What do dispersion and distribution of the filler into polymer matrix mean?

Or why are good dispersion and bad distribution of filler good for electrical conductivity? Thanks in advance

11 November 2014 5,486 9 View

Could you please kindly help me in inswering the following questions

1)What is the difference between modulus and stiffness ? 2)What is the difference between hoppoing and tunnling effect in electrical conductivity? Also , how Do they work? 3)What is the difference...

10 October 2014 5,963 2 View

What is the excessive condition for acid treatment of carbon.

Does increase time of mixing would improve the dispersion. Please any idea

09 September 2014 2,688 2 View

How can we control dispersion and distribution of fillers into polymers?

Would increased time of mixing improve the dispersion? Please any idea.

09 September 2014 1,501 11 View

How can I know the effective modulus of fillers inside the polymer from tensile or DMTA data?

Effective modulus. Please help.

09 September 2014 6,775 4 View

Model

Could you please let me know that What is best model to predict tensile strength of polymer graphite composites.

08 August 2014 9,390 2 View

Tunnelling

What is hoping mechanism in conductive composites ? How does it work. is it depend on filler ? Please any idea

08 August 2014 9,295 1 View

What is damping behavior for composites. What difference between it and loss modulus?

Polymer nanocomposites.

08 August 2014 7,372 5 View

Why graphite nano platelets agglomerate into polymer matrices but graphite does not ? Please idea

Comparing graphite and GNP

07 July 2014 7,361 1 View

Why does the DSC curve rise up after the melting point of a polymer despite temperature increase?

Polymer crystallization. Any help please will be appreciated.

06 June 2014 423 7 View

What is the loss modulus values tell in term of enhancement of interfacial interactions between the polymer chains and the fillers?

Polymer carbon nanocompsoites

06 June 2014 9,736 2 View

Why does Tg decreases for polymer Nanocomposite containing acid treated MWCNT despite a good interaction between the polymer and filler?

Acid treatment advice needed.

06 June 2014 3,093 15 View

Why does tensile strength decrease upon addition of a nanofiller while ease tensile modulus increases?

Anyone help please.

06 June 2014 5,381 18 View

What does tan delta curve height mean in the polymer Nanocomposite?

I am testing polymer composites via DMA. Could please any one help?

05 May 2014 8,118 10 View