José Alberto Salazar-Jiménez

11 Questions 21 Answers 0 Followers

Questions related from José Alberto Salazar-Jiménez

Does anyone have references on plasma welding/melting and Modeling and Simulation (Mathematical Equations)?

Hello everyone, May anyone please guide me with some bibliography about the modeling and simulation of a Plasma welding/melting process (mainly emphasizing on mathematical equations)?I have to...

08 August 2014 6,669 2 View

Is atmospheric corrosion similar to general (homogeneous) corrosion?

If they are, in what terms are they?

01 January 2014 3,947 6 View

Simulation of Carbon Nanotube - Polymer Nanocomposites in Comsol Multiphysics?

Does anyone have information about the simulation of Carbon Nanotube - Polymer Nanocomposites in Comsol Multiphysics?

06 June 2013 9,221 12 View

Solution of Non-Thermoplastic Polyurethane?

Can a non-thermoplastic polyurethane be dissolved in an organic solvent, like THF? By non-thermoplastic, I refer to a polyurethane made with a tri-functional polyol

06 June 2013 502 4 View

What is the easiest methodology for the synthesis of an elastomeric polyurethane?

For example, I have read from some papers, that this issue can be done with a simple magnetic stirring of the components (polyol, isocyanate, chain extender) in a beaker at approx 80 ªC and...

06 June 2013 9,764 22 View

Glycerol propoxylate-block-ethoxylate for Polyurethane?

Is there information about the usage of Glycerol propoxylate-block-ethoxylate (f = 2.5) as a polyol in polyurethane synthesis?

06 June 2013 1,912 0 View

Where can I buy microsized polyolefin (PE and PP) powders?

I'm looking for microsized polyolefin powders for a study using solution casting with carbon nanotubes. Can someone suggest a place where I can buy them?

05 May 2013 5,482 2 View

How to calculate the molar ratio for the components of a polyurethane in a stoichiometric value?

For example, if I have: Trifunctional polyol (MW = 6000 g/mol) Diisocyanate (MW = 250 g/mol) Chain estender (WM = 90 g/mol) How much do I need in grams of (each one) for the stoichiometric molar...

01 January 2013 2,422 8 View

For a polyurethane...Is the degree of crosslinking defined by the component with the highest functionality?

For example, if any component which forms a polyurethane has a functionality greater than 2, crosslinks are formed in the structure of this polymer, regardless the nature of this component...

01 January 2013 4,438 2 View

What is the NCO/OH ratio and what does it mean? How can I calculate it?

I have seen in several papers that the NCO/OH ratio directly affects the properties of a polyurethane, but they do not explain how they obtained that ratio. Any suggestions?

12 December 2012 4,454 6 View

Can I prepare an elastomer polyurethane with a trifunctional polyol instead of a difunctional polyol?

I have read that for the preparation of a polyurethane elastomer, a difunctional polyol is used, where this elastomer requires crosslinkings in its structure presented by hydrogen bonds. Can I use...

12 December 2012 5,106 6 View