Considering zeolite added to the polymer, a significant relative
increase is seen in the temperature degradation of polyurethane–
zeolite membrane, compared to the pure sample. This is due to
the connection of the zeolite particles to the polymer chains. Presence
of Zeolite particles in PU–Zeloite samples, making some
bonds between these particles and polymeric chains and, need to
further heat to break this bonds has caused that the amount of thermal dissociation of this samples increased compare to the pure
samples of PU.