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The properties of polyethylene crystallized under the orientation and pressure effects of a pressure capillary viscometer
Author(s) -
Southern John H.,
Porter Roger S.
Publication year - 1970
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/app.1970.070140910
Subject(s) - differential scanning calorimetry , materials science , capillary action , crystal (programming language) , viscometer , rheometer , polyethylene , composite material , crystal structure , crystallography , polymer chemistry , rheology , chemistry , thermodynamics , viscosity , physics , computer science , programming language
High‐density commercial polyethylenes have been crystallized under the combined orientation and pressure effects available in the Instron capillary rheometer. The samples so formed were found to have a high degree of crystal perfection and crystal orientation in combination with the unusual property of transmitting visible light. The procedure for forming the crystal structure is elucidated. X‐Ray and differential scanning calorimetry techniques were utilized to initiate a study of the structure. Evidence is presented that is consistent with the presence of an extended chain component in the crystal structure.