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Synthesis and characterization of poly(ether urethane)‐nylon 6 block copolymer
Author(s) -
Seo Seung Won,
Ha Wan Shik
Publication year - 1993
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.1993.070480508
Subject(s) - prepolymer , copolymer , polymer chemistry , materials science , ether , isocyanate , polymer , polyurethane , chemistry , composite material , organic chemistry
poly(ether urethane) (PEU) prepolymer terminated with isocyanate at both ends was prepared by controlling the mol ratio of poly(tetramethylene glycol) and methane diphenyl‐4,4'‐diisocyanate. Using this prepolymer as an activator, the anionic polymerization of ϵ‐ caprolactam was carried out to obtain PEU‐nylon 6 block copolymer. The phase structure of the block copolymers was characterized on the basis of molecular interaction. The results of dynamic mechanical and thermal analyses revealed that the block copolymer films prepared via melt pressing and subsequent quenching had a one‐phase structure. The equilibrium melting temperatures determined by a Hoffman‐Weeks plot showed that the two blocks are miscible in the melt state. N ‐Trifluoroacetylation of the block copolymer led to the conclusion that this miscible behavior is due mainly to the specific interaction between urethane groups in PEU block and amide groups in nylon 6 block through hydrogen bonding. © 1993 John Wiley & Sons, Inc.