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Technology and Stress Relaxation of Biaxially Oriented Polyolefin Shrink Films
Author(s) -
Bobovitch Arthur,
Unigovski Yakov,
Jarashneli Albert,
Gutman Emmanuel M.
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451017
Subject(s) - linear low density polyethylene , polyolefin , materials science , vinyl acetate , ethylene vinyl acetate , stress relaxation , elongation , relaxation (psychology) , polyethylene , composite material , copolymer , stress (linguistics) , polymer chemistry , polymer , creep , ultimate tensile strength , psychology , social psychology , linguistics , philosophy , layer (electronics)
In the present study the influence of the heating rate on the stability of the double bubble technological process was investigated. It was shown that increasing the heating rate decreases the stability of the process and causes the lower elongation of the films produced. The morphological transformations of linear low density polyethylene (LLDPE) film were explained using X‐ray and transmission electrom microscopy (TEM) methods. The stress relaxation behavior of co‐extruded LLDPE/ethylene‐vinyl‐acetate (EVA) film was studied using the relaxation time spectrum approach. The influence of vinyl‐acetate (VA) content in EVA copolymers on the relaxation time spectrum was observed.