Observations of Deformation in Spherulitic Polyethylene
作者:
Paul Predecki,
A. W. Thornton,
期刊:
Journal of Applied Physics
(AIP Available online 1970)
卷期:
Volume 41,
issue 11
页码: 4342-4346
ISSN:0021-8979
年代: 1970
DOI:10.1063/1.1658464
出版商: AIP
数据来源: AIP
摘要:
A thin film marker technique is described for determining quantitatively from replicas the nonhomogeneous deformation modes operative in spherulitic polyethylene. Experiments were conducted at temperatures from −20° to 120°C and strain rates of the order of 0.04 sec−1. At −20°C, pronounced deformation at spherulite boundaries is observed. This results in stress concentrations which cause the accompanying nonhomogeneous deformation of the spherulites themselves to occur. At 70°C, corresponding to the &agr; relaxation, the deformation has become almost entirely homogeneous within lamellae. At 120°C, corresponding to the &agr;′ relaxation, lamellar boundary slip is clearly observed in addition to homogeneous deformation.
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