Sanjiban Chakraborty

3 Questions 7 Answers 0 Followers

Questions related from Sanjiban Chakraborty

How to make a water sensitive hydrophobic monomer miscible with a hydrophilic monomer w/o using any solvent?

I am planning to run a polyurethane reaction which has two monomers: one is a diisocyanate and the other is a diol. However the diisocyanate is not forming a homogenous mixture with the diol. The...

09 September 2019 6,774 3 View

How do I make a polymer chunk into fine powder of particle size ~100 micron or less?

I have a partially crosslinked polyurethane polymer which need to be crushed into fine powder of particle size ~ 100 micron or less. The polymer is tough but gooey or rubbery. We tried the...

03 March 2019 7,365 7 View

I am making a polymer slab of thickness 5-6 mm inside a customized stainless steel mold by compression molding. Why the slab has bumpiness on surface?

I am applying vacuum during the compression of the polymer powder. Then cooled the polymer slab slowly and opened the mold. The polymer slab has bumps or non-uniform surface. How to eliminate the...

05 May 2018 5,885 6 View