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研究了由微小潮湿玻璃球(直径为200~220μm)在硅油中加直流电场后形成的电流变体单“链”的力学性质.发现受剪单链的剪切屈服应力与外加电场强度的1.4次幂成正比,剪切屈服应力与组成链的玻璃球的数量(3~5个)无关.在较小的剪应变下,剪应力随剪应变的增加而增加;剪应力达到最大值(屈服点)以后又开始随剪应变的增大而减小.实测单链的剪切屈服应力及剪切模量随电场强度的变化与理论预报吻合良好.
The mechanical properties of a single “chain” of current variants formed by the application of a direct current electric field in a micro moist glass globe (200-220 μm in diameter) were investigated. It is found that the shear yield stress of single shear chain is directly proportional to the 1.4th power of applied electric field strength, and the shear yield stress has nothing to do with the number of glass balls (3 ~ 5). With smaller shear strain, the shear stress increases with the increase of shear strain. When the shear stress reaches the maximum value (yield point), it begins to decrease with the increase of shear strain. The measured shear yield stress and shear modulus of the single-stranded chains are in good agreement with the theoretical prediction as a function of the electric field strength.