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One‐pot synthesis of hyperbranched poly(aryl ether ketone)s for the modification of bismaleimide resins
Author(s) -
Tang Haoyu,
Fan Xinghe,
Shen Zhihao,
Zhou Qifeng
Publication year - 2014
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.23715
Subject(s) - materials science , polymer chemistry , ether , glass transition , monomer , branching (polymer chemistry) , aryl , ketone , dispersity , polymerization , polymer , organic chemistry , composite material , chemistry , alkyl
Hyperbranched poly(aryl ether ketone)s with hydroxyl end groups (HBP‐OH) and high degree of branching value (83%) were synthesized via an A 2 + B 3 approach. The polymerization conditions (e.g., polymerization temperature and time, monomer concentration, stoichiometric ratio of functional groups) were explored to avoid the gelation. Allyl‐terminated hyperbranched PAEKs (HBP‐AL) with low molecular weight ( M n = 3.4 × 10 3 ) and narrow polydispersity (PDI = 1.65) were obtained via the etherification of HBP‐OH and it has been used for the modification of bismaleimide (BMI) resins. The prepolymers showed good processibilities with a viscosity below 0.6 Pa s at 110°C, though the viscosities slightly increased as the increase of HBP‐AL contents. The cured BMI resins showed high glass transition temperatures ( T g > 320°C) and good thermal stabilities ( T d > 400°C, both in nitrogen and air). It is inspiring to note that the incorporation of HBP‐AL into BMI matrix results in a significant enhancement of toughness without any noticeable loss in modulus, processibility, and T g . POLYM. ENG. SCI., 54:1675–1685, 2014. © 2013 Society of Plastics Engineers