PU Elastomer Compositions

The properties are now given of two different series of PU elastomers prepared from the following molar ratios of linear polyol/diisocyanate/ chain extender  

INFLUENCE OF CROSSLINK DENSITY ON THE PHYSICAL PROPERTIES OF BDO CHAIN-EXTENDED CHDI BASED POLYURETHANE ELASTOMERS AT ROOM AND ELEVATED TEMPERATURES (CAPA 225/CHDI/BDO OF BASIC MOLAR RATIO 1 2 1 

EB UTS MIOO M300 EB UTS MIOO M300 EB UTS MIOO M300 EB UTS MIOO M300  

Thermal stability properties are measured by two complementary methods, i.e. tensile-type measurements at elevated temperatures using a hot-air environmental chamber and also the Dynamic Mechanical Thermal Analyzer (DMTA) method. In the DMT A test a small rectangular strip (40 mm X 10 mm x 2 mm) is subjected to constant cyclic deformation over a changing temperature range and the storage modulus ( ) recorded and used to relate change of stiffness with temperature. 

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