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聚乙烯薄膜在室温下进行单轴拉伸,对不同形变阶段试样进行X射线线形分析,结果表明:在屈服前的弹性区和屈服后的应力增加区微观应变(畸变)明显增加,而微晶尺寸变化不大,而在塑性流变恒应力平台区中,微晶尺寸急剧下降,微观应变变化很小。
The polyethylene films were uniaxially stretched at room temperature. The X-ray analysis of the samples in different deformation stages showed that the micro-strain (distortion) in the elastic zone before yielding and the stress-increasing zone after yielding were significantly increased, while the micro Crystal size changes little, but in the plastic rheological constant stress platform area, the sharp decline in crystallite size, micro-strain change is small.