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Structure and properties of polyurethane acrylate prepolymers based on hydroxy‐terminated polybutadiene
Author(s) -
Henry Isabelle,
Pascault JeanPierre,
Taha Mohamed,
Vigier Gérard,
Flat JeanJacques
Publication year - 2001
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.2238
Subject(s) - polybutadiene , polyurethane , materials science , acrylate , small angle x ray scattering , polymer chemistry , glass transition , isocyanate , ethyl acrylate , methacrylate , butyl acrylate , morphology (biology) , hydroxyl terminated polybutadiene , crystallite , composite material , chemical engineering , copolymer , scattering , polymer , physics , biology , metallurgy , optics , genetics , engineering
Precursors of polyurethane acrylate based on hydroxy‐terminated polybutadiene (HTPB) soft segments, different diisocyanate and hydroxy ethyl acrylate (HEA) as hard units, were synthesized in bulk or in solution in methyl methacrylate. During precursor synthesis (in bulk), microphase separation was observed by small‐angle X‐ray scattering (SAXS). Diffusing particles are around 50 Å in size and are assumed to be assembling of hard segments. From these morphologies, it can be deduced that some isocyanate groups were trapped/or buried in hard domains. At a larger scale, around millimeters, hard segment crystallites were observed. Properties such as molar masses, melting and glass‐transition temperatures, and viscosities were correlated with precursor structure and morphology. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 225–233, 2002