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Molecular formula :
MW :
CAS :
nature : certain substances (or low molecular weight polymer) under the action of external performance of both the viscous and elastic properties. For example, asphalt, putty, plastic, rubber and fiber. If that role slower forcing a longer time, they would like very sticky liquids, mainly plastic deformation. If that role soon forcing a shorter period of time, like a flexible solid, mainly for high-elastic deformation.
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