Polyurethane Foam Properties Good
They can be thermosetting or thermoplastic rigid and hard or flexible and soft.
Polyurethane foam properties. Long chains and low crosslinking give a polymer that is very stretchy short chains with many crosslinks produce a hard polymer while long chains and intermediate crosslinking give a polymer useful for making foam. The properties of a polyurethane are greatly influenced by the types of isocyanates and polyols used to make it. Long flexible segments contributed by the polyol give soft elastic polymer.
While both are established types of polyurethane foam there are differences in their physical characteristics that determine their suitability for different applications. The crosslinking present in. The stream of polyol includes surfactants catalysts blowing agents and others.
A urethane is a carbonyl containing functional group in which the carbonyl carbon is bonded to both an or group and an nr 2 group. For shock absorbing elastomer applications low rebound compounds are usually used i e. Polyurethanes pur are one of the largest classes of polymers with properties that can be tailored over a wide range for a large number of application.
For high frequency vibrations or where. They are formed from the reaction of an organic diisocyanate with a diol compound which leads to urethane linkages in the backbone nh c o o. Electrical properties polyurethanes exhibit good electrical insulating properties.
6c 27 h 36 n 2 o 10 185o 2 162co 2 106h 2 o 4hn 3. Wide resiliency range resilience is generally a function of hardness. High amounts of crosslinking give tough or rigid polymers.
Polyurethane foam is divided into two basic types open cell and closed cell. This difference in resiliency has led to a preference for polyether foams in cushioning applications particularly upholstery and bedding. Polyurethanes properties introduction the polyurethanes pu foams are widely used as insulating and core materials for furniture cooling and freezing systems in housebuilding shipbuilding etc.
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