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高分子化合物的本体流动方式有两种:粘流及塑流,在给定条件下可以互相转变。例如我们曾发现,天然橡胶在中温时的流动方式系非牛顿粘流,于中等应力下且服从 Eisenschitz 公式;而当温度降低时即转变为塑流,且系非宾哈塑流。此外,对于这种从粘流转变为塑流的原因则迄未探明。例如李泰圭及 Eyring 在重新处理 Saunder 及 Treloar 对天然橡胶的流动数据时,曾认为这是一种不明原因的“二级转变”。
There are two ways of bulk flow of macromolecular compounds: viscous flow and plastic flow, which can change each other under the given conditions. For example, we have found that the flow of natural rubber at medium temperature is non-Newtonian viscous flow at moderate stress and obeys the Eisenschitz equation, whereas when the temperature decreases, it changes to plastic flow and is non-Binha plastic flow. In addition, the reasons for this change from viscous flow to plastic flow have not been proven. For example, when Lee Tae-Kyu and Eyring reprocessed Saunder and Treloar’s data on the flow of natural rubber, they thought it an “second-order shift” of unknown cause.