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Article
Synthesis and Characterization of Shape-Memory Polyurethane Polybenzoxazine Compounds
Polymer Engineering Faculty Research
  • Sadhan Jana, The University of Akron
Document Type
Article
Publication Date
10-1-2012
Abstract
The study investigates the scope for significant enhancements in shape-memory properties in blends of thermoplastic polyurethanes (PUs) and polybenzoxazine (PB). PB was expected to serve as a second fixed phase in addition to hard segment of PU. The shape-memory compounds were prepared in three steps. First, benzoxazine monomer was dissolved in urethane prepolymer synthesized from 4,4′-methylenebis (phenyl isocyanate) (MDI) and poly (tetramethylene) glycol (PTMG). Second, the prepolymer was chain extended with 1,4-butanediol (BD) without curing of benzoxazine. Third, the benzoxazine was polymerized into PB by thermal curing at 180 °C for 3 h. A compound with 17 wt% PB exhibited a recovery stress (RS) of 13 MPa and strain recovery (SR) of 93% compared with RS of 6.8 MPa and SR of 72% for PU.
Citation Information
Sadhan Jana. "Synthesis and Characterization of Shape-Memory Polyurethane Polybenzoxazine Compounds" (2012)
Available at: http://works.bepress.com/sadhan_jana/185/