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Crystallization phenomena in the injection molding of poly ether ether ketone and its influence on mechanical properties
Author(s) -
Hsiung ChangMeng,
Cakmak Mukerrem,
White James L.
Publication year - 1990
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760301606
Subject(s) - peek , materials science , differential scanning calorimetry , crystallization , molding (decorative) , ether , polyether ether ketone , composite material , diffraction , mold , chemical engineering , polymer , optics , organic chemistry , thermodynamics , chemistry , physics , engineering
A basic experimental investigation of structure development in the injection molding of poly ether ether ketone (PEEK) is presented. It is shown that, dependent upon processing conditions, especially mold temperature, PEEK may be injection molded to form glassy or crystalline parts or parts consisting of intermediate structures such as a glassy surface and one with an internal crystalline link. In general, cold molds produce glassy parts and hot molds crystalline parts. This behavior is carefully characterized using optical microscopy, differential scanning calorimetry, and wide angle X‐ray diffraction techniques. The mechanical properties of these injection molded parts is characterized as a function of the crystalline and glassy contents and types of structural gradients developed in the parts.