On the other hand, the transmission mode of servomotor driving ballscrew was adopted, which could realize the accurate rheological measurement of the polymer with continuously changed share rate.

• 二是采用伺服电机驱动滚珠丝杠的传动方式，实现对聚合物熔体在剪切速率连续变化时的精确测试，是一种非稳态测试。