Cosimo Brondi

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Questions related from Cosimo Brondi

What is a reference band for polyisocyanurate (PIRs) foams in FTIR in order to account the density changes?

Dear experts, I am dealing with the synthesis and characterization of PIR foams. In particular, I am monitoring the kinetics of these foams by FTIR (please find the spectra attached below). As...

07 July 2019 5,583 3 View

In which way the contact between two reactants can be affected by the degree of mixing?

Dear experts, I am investigating how polyurethanes are affected by the degree of mixing. More in general, I am interested to study how the contact between the two reactants (in my case polyol and...

06 June 2019 4,867 7 View

How to mix pentane with polyol without air bubbles introduction by dynamic mixing?

Dea experts, I am working in the field of polyurethane synthesis. I would kindly ask it there is any method and/or techinique suitable to add liquid pentane (blowing agent) to the polyol phase...

06 June 2019 3,810 4 View

How to use Canny edge detector for polymeric (polyurethane) foams?

Dear experts, I would like to detect bubble (or cell) boundaries of polyurethane foams during their expansion. Please find attached two microphotographs of the abovementioned systems. How can I...

12 December 2018 1,076 2 View

Are there any optical techniques that allow to turn an opaque material into transparent material?

Dear experts, I am studying bubble nucleation and growth mechanism in polyurethane foams by meaning of high-speed camera. My current issue is related to the observation of just the first layer of...

12 December 2018 9,019 0 View

Which model for gas sorption in liquid thin film polymers fits an s-shaped (sigmoid) isotherm properly?

Non-fickian (anomalous diffusivity) kinetics sorption.

09 September 2018 1,165 0 View