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The melt viscosity of the rheological properties of the performance of the relationship between shear
High molecular weight polymers such as polyethylene melt in equilibrium, not the molecular chain end of the chain from the chain to stretch the head, on the contrary, when we assume that the chain so-called "random coil" configuration. Both similar to the three-dimensional shape of the chain then walk. Random coil structure of this molecule interpenetrating therefore mainly given molecule surrounding its molecular chain, which together constitute a "tube" in the tube elements, the sealed package has been studied. Molecular polymer melt flow both through its own "control" of axial movement. Has "control" their lateral movement. Obviously, the above process requires a lot of common molecular motion segment. This explains why the melt viscosity of the polymer is higher than the liquid having a chemical structure similar to several orders of magnitude times the small molecules of this fact.
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