Plastic strain of amorphous poly(butylene succinate) films in stretching was studied. Self-oscillating necking was detected at very low stretching rates, at which, according to the existing concepts, oscillations are impossible. It was concluded that the self-oscillations are a consequence of a previously unknown mechanism of instability of plastic flow.

中文翻译：

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聚丁二酸丁二醇酯应变软化引起的颈缩不稳定性

研究了无定形聚丁二酸丁二醇酯薄膜在拉伸过程中的塑性应变。在非常低的拉伸率下检测到自振荡颈缩，根据现有概念，在这种情况下不可能发生振荡。得出的结论是，自振荡是以前未知的塑性流动不稳定机制的结果。