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Polytriazoles based on alkyne terminated polybutadiene with and without urethane segments: Morphology and properties
Author(s) -
Li Hui,
Yu Qianqian,
Zhao Fengqi,
Wang Bozhou,
Li Na
Publication year - 2017
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.45178
Subject(s) - polybutadiene , alkyne , materials science , morphology (biology) , polymer chemistry , microstructure , hydroxyl terminated polybutadiene , plasticizer , macromolecule , dynamic mechanical analysis , glass transition , ductility (earth science) , chemical engineering , composite material , polymer , copolymer , chemistry , organic chemistry , catalysis , biochemistry , creep , biology , engineering , genetics
Alkyne terminated polybutadiene with urethane segments (PUPB), a well‐controlled macromolecule, is synthesized with a two‐step routine and characterized by 1 H NMR, IR spectroscopy as well as gel permeation chromatograph. Alkyne terminated polybutadiene without urethane segments (PTPB) is also synthesized and characterized. The two alkyne terminated polybutadiene are cured to generate corresponding polytriazoles. It is found that the mechanical properties of PUPB based polytriazoles are superior to that of PTPB. The fractured surfaces of PTPB based polytriazoles exhibit smooth microstructures whereas PUPB based polytriazoles show the rough microstructures. The atomic force microscopy images reveal well‐established microphase‐separated morphology in polytriazoles with the promotion of urethane segments. Thus, the strong hydrogen bonding interaction existed in urethane has a remarkable effect on the morphology and then the mechanical properties of the as‐prepared polytriazoles. In addition, dioctyl sebacate can serve as an excellent plasticizer to PUPB based polytriazoles, lowering the glass transition temperature ( T g ) and improving the ductility. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45178.