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A mandrel‐rotating die to produce high‐hoop‐strength HDPE pipe by self‐reinforcement
Author(s) -
Long Jiang,
Kaizhi Shen,
Jiliang Ji,
Qing Guan
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19980711)69:2<323::aid-app13>3.0.co;2-x
Subject(s) - mandrel , high density polyethylene , composite material , materials science , extrusion , polyethylene , differential scanning calorimetry , die (integrated circuit) , physics , thermodynamics , nanotechnology
This article provides a method to obtain high‐hoop‐strength high‐density polyethylene (HDPE) pipe by mandrel‐rotating extrusion. With properly selected processing temperature, pressure, and mandrel‐rotating speed, the hoop strength of 90 Mpa has been got. Differential scanning calorimetry and X‐ray scattering found the great strength enhancement was owning to high degree of macromolecular orientation in circumferential direction and the shish‐kebab structure. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 323–328, 1998