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Synthesis and characterization of block and random POSS/fluorinated PAES tricopolymers
Author(s) -
Jiang Qiyang,
Hao Jinmeng,
Wei Yanfeng,
Mu Jianxin
Publication year - 2017
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.3965
Subject(s) - silsesquioxane , materials science , copolymer , dielectric , ether , thermal decomposition , ceramic , polymer chemistry , sequence (biology) , chemical engineering , composite material , polymer , organic chemistry , chemistry , biochemistry , optoelectronics , engineering
Block and random polyhedral oligomeric silsesquioxane (POSS)/fluorinated poly aryl ether sulfone tricopolymers were synthesized using different synthetic strategies to investigate the effect of sequence distribution on their thermal, dielectric, and surface properties. Analyses indicated that all block and random copolymers showed similar growth tendency of water contact angles and T g values, downward tendency of k values with increased content of POSS. The block copolymer displayed higher T g values up to 187°C than random copolymers (173°C) under the same POSS molar percentage, which were highly related to their different sequence distribution. The dielectric constants of the tricopolymers were drastically reduced because of the presence of POSS and fluorine, and the dielectric constant could achieve as low as 2.71 (1 MHz). Besides, sequence distribution has no obvious influence on its surface properties and properties. Meanwhile, the yields of degradation residues of the tricopolymers were significantly improved by the ceramic formation from POSS moieties during thermal decomposition. Copyright © 2016 John Wiley & Sons, Ltd.