Flow: is the process of irreversible transition between the molecules of a substance corresponding to each other under the effect of the external forcesViscous flow status: heat supply is greater than the force of interaction molecular link between them, about the liquid-like properties but very high viscosity.The viscosity decreases as the temperature and the amount of dissolved gases increasesThe viscosity increases when the pressure tThe polymer molecules when heated will switch from glass to the status status of the software. If the burning continues will switch to viscous flow status. And then, if the heat continues, the polymer will start to decompose into smaller vessels
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