z-logo
Premium
Properties and crystallization kinetics of poly(ether ether ketone)‐ co ‐poly(ether ether ketone ketone) block copolymers
Author(s) -
Zhang YunHe,
Liu QinHua,
Niu YaMing,
Zhang ShuLing,
Wang Dong,
Jiang ZhenHua
Publication year - 2005
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.21395
Subject(s) - copolymer , ether , peek , polymer chemistry , materials science , ketone , differential scanning calorimetry , glass transition , crystallization , avrami equation , chemistry , organic chemistry , thermodynamics , polymer , composite material , crystallization of polymers , physics
A series of block copolymers composed of poly(ether ether ketone) (PEEK) and poly(ether ether ketone ketone) (PEEKK) components were prepared from their corresponding oligomers via a nucleophlilic aromatic substitution reaction. Various properties of the copolymers were investigated with differential scanning calorimetry (DSC) and a tensile testing machine. The results show that the copolymers exhibited no phase separation and that the relationship between the glass‐transition temperature ( T g ) and the compositions of the copolymers approximately followed the formula T g = T g 1 X 1 + T g 2 X 2 , where T g 1 and T g 2 are the glass‐transition‐temperature values of PEEK and PEEKK, respectively, and X 1 and X 2 are the corresponding molar fractions of the PEEK and PEEKK segments in the copolymers, respectively. These copolymers showed good tensile properties. The crystallization kinetics of the copolymers were studied. The Avrami equation was used to describe the isothermal crystallization process. The nonisothermal crystallization was described by modified Avrami analysis by Jeziorny and by a combination of the Avrami and Ozawa equations. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1652–1658, 2005

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here