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Questions related from Yohanes Kurniawan
I have two questions in determining OH value of polyol: 1. While OH number of polyol is expressed as mg KOH/g sample, the determination of OH value (such as ASTM D4274-11) doesn't use KOH but...
02 May 2016 1,361 5 View
I would like to know whether it is possible to have a very high density open-cell rigid PU foam, let's said at minimum 1100 kg/m^3. If not possible, on what reason and what is the possible max...
27 October 2015 6,284 5 View
With waterblown system for rigid closed-cell polyurethane system, water reacts with isocyanate to form CO2 and this gas caused bubble on the foam surface. The surfactant dosage was tried to 2 and...
18 November 2014 5,911 6 View
The quality of polyiso foam depends on how far the trimerization reaction was converted during the foaming, but what is the best way to measure it?
09 October 2014 4,040 4 View
In doing formulation, sometimes we have got the required gelling time, but not the cream time or vice-versa. Is there any simple way to tune in the catalyst side in order to get both cream time...
09 October 2014 8,822 3 View
1. thermal conductivity - tested at ambient temperature - aged 180 days (C-177)2. thermal conductivity - tested at -180 deg - fresh foam (C-177)3. thermal conductivity - tested at -180 deg - aged...
02 October 2014 3,703 2 View
Is it just similar like PolyUrethane foam? Just curious with this PMI foam, how to make it?
22 September 2014 9,299 5 View
