My polymer is glassy solid yet stuck to whatmann fiter paper. how can I obtain my polymer?

I precipitated the polymer in methanol and then tried to filter the polymer. However, my polymer stuck to whatman filter paper. how can I obtain the polymer now?

08 September 2018 373 2 View

I was not able to isolate the product from the DMSO . Please help me how to do it?

I want to synthesize the exo norbornene alcohol as was described in the reference.Macromolecules 2005, 38, 9455-9465. the problem is that I was not able to remove the DMSO solvent. Please help me...

06 July 2018 3,925 3 View

Can I dry macromonomers with Norbornene end cap at 120 degrees centigrade for 4 hours?

I synthesized polymers of PEO with different molecular weights with Norbornene end cap. I want to dry the sample in order to perform for the Ring Opening Metathesis Polymerization. Can I dry my...

05 June 2018 2,273 4 View

Is silica gel soluble/partially soluble in acetone?

we need to purify the pyrrolidone derivatives. When we checked the TLC, the compound Has Rf of 0.6 in acetone. But other solvents showed no movement of the spot from the base line. However, when I...

05 June 2018 2,345 3 View

Can we really trust the procedures published in the scientific journals?

I found that many procedures reported in the journals are not reproducable even when same conditions are maintained? why is it so?

10 November 2017 1,852 2 View

How to prepare 1, 1-Dipheynylmethyl Potassium ?

I want to prepare DPMK initiator for my polymerizations. Please give me a pdf file of the journal necessary.

08 September 2017 384 4 View

Is the refractive index of both monomer and polymer same?

07 August 2017 4,315 4 View

How to remove moisture from the polyethers?

I synthesized polyethylene glycol. I need to remove moisture from the polymer. T tried freeze drying but it didn't work please suggest me some other method which removes moisture. Thanking You in...

07 August 2017 2,411 9 View

Please let me know about the good practical books for learning glass blowing techniques.?

glass blowing for Schlenk techniques

03 April 2016 943 2 View

What is the weight of the polymer 'polyisoprene' with a molecular weight of 10000?

please help me in calculating the weight of the polyisoprene whose molecular weight is 10000.

02 March 2016 974 0 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View

How Download/Extract citations of 1 given year ALL my publications in Google Scholar?

If you google this you find a lot of smart guys explaining you how to download 1 year of citations of 1 single paper of yours (or anyone else). I mean 1 year of ALL my papers. or ... ALL years or...

01 March 2021 1,121 9 View

Glass fiber content in a gypsum board ?

Any idea on how to get the volumic ratio of glass fiber in a gypsum board ? Thank you for your help !

01 March 2021 2,501 3 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

Any suggestions for a website that allows you to create questionnaires and gather unlimited data (Totally free)?

I have found only four of them; www.surveyplanet.com www.online-anket.gen.tr www.surveey.com and of course google forms. Expecting to see your suggestions if there is any. Thank you

28 February 2021 3,237 3 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View