How we can perform biodegradability test for polyurethanes?

More Abbas Mohammadi's questions See All

Can anyone help me with the calculation of fluorescence quantum yield?

How can I determine fluorescent quantum yield using UV-vis spectroscopy of perylene derivatives? Which parameters do we need?

07 August 2014 9,116 8 View

How we can perform methylation reaction on only two hydroxyl of calix[4] arene?

06 July 2013 3,349 1 View

I want know how to produce polycaprolactone in an industrial process?

Please tell me essential reagents and conditions.

01 February 2013 3,573 1 View

Is there any simple and inexpensive method to produce lactone from cyclohexanone?

Please tell me the essential condition and required reagents for performing of this reaction.

01 February 2013 7,399 6 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 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

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 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

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

No title

I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

Reza-Ul Jalil

Mr Muniyasamy has given a very short and comprehensive answer. It is important to know first the purpose and application of PU, for which bio-degradation study is required. Environmental conditions around the polymer, such as, presence of water, microbes, enzymes etc with have to consider before deciding on the degradation study.