Outgassing analysis of polyurethane foams


What are polyurethanes ?
They are thermosetting polymers produced by the reaction of an isocyanate and a polyol of various types.
There are obviously different types of diisocyanates and polyols, the most used in this case being:
Diisocyanates :
 Polyols :
TDI - Toluenediisocyanate [584-84-9] PTMEG - Polytetramethyleneether glycol or PolyTHF [25190-06-1]
MDI - Methylenebisdiphenyldiisocyanate [101-68-8] PPG - Polypropyleneether glycol [25322-69-4]
-
 Polyester polyols
-
 Hydroxy triglycerides


Polyurethane foam is produced by adding a blowing agent such as Carbon dioxide, Methylene chloride [75-09-2], Alkanes (Isobutane [75-28-5], Butane [106-97- 8]…), Hydrofluorocarbons (HFCs) such as Polyfluoropropane [679-86-7], [431-63-0], [690-39-1], Polyfluorobutane [406-58-6], Hydrofluoro-olefins (HFO) such as Polyfluoropropene [1645-83-6] ...
These gases present in the design of the foam will gradually escape from the cells of the foam to make room for air. A foam which will have completely degassed will contain no more (or very little) of these blowing agents.
Isopropyl alcohol detection
These gases present in the design of the foam will gradually escape from the cells of the foam to make room for air. A foam which will have completely degassed will contain no more (or very little) of these blowing agents.
In order to identify and quantify the gases emitted by samples of PUr foams, our team favors the analytical technique by HeadSpace / GCMS .


You are manufacturers of polymeric foams and want to know if they still outgas and until when? Do you have a competitor's foam and want to know the nature of the gases present?

Call on the Polymex Laboratory !

CONTACT US