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The preparation, compatibility and structure of PEEK–PES blends
Author(s) -
Ni Zhuo
Publication year - 1994
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1994.220050927
Subject(s) - peek , materials science , composite material , exothermic reaction , crystallization , polymer chemistry , chemical engineering , polymer , organic chemistry , chemistry , engineering
Blends of polyetheretherketone and polyethersulfone (PEEK–PES blends) were prepared either by mechanically mixing fine PEEK and PES powders or by mixing PEEK and PES solutions in H 2 SO 4 (98%). Partially compatible blends were obtained in the latter method. The sulfurization of PEEK or PES in concentrated sulphuric acid did not occur provided that the experiment was performed within 30 min. The T g of the PEEK component increased and that of PES component decreased with the increase of PES weight fraction; the melting exothermic peak of the PEEK component did not appear in the DSC curves of the quenched blends, suggesting that PES can effectively reduce the crystallization of PEEK component. The major absorbances of the bands were characterized by IR spectroscopy; the frequency difference between PEEK or PES and their blends were observed. A linear correlation of absorbance ratios with PEEK weight fraction was found.