High temperature thermoplastic elastomers synthesized by living anionic polymerization in hydrocarbon solvent at room temperature

Schlegel, Ralf; Williams, Katherine; Voyloy, Dimitry; Steren, Carlos A.; Goodwin, Andrew; Coughlin, E. Bryan; Gido, Samuel; Beiner, Mario; Hong, Kunlun; Kang, Nam -Goo; Mays, Jimmy; Wang, Weiyu; White, Benjamin T.

doi:10.1021/acs.macromol.5b02642

High temperature thermoplastic elastomers synthesized by living anionic polymerization in hydrocarbon solvent at room temperature

Journal Article · Wed Mar 30 00:00:00 EDT 2016 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.5b02642· OSTI ID:1253243

Schlegel, Ralf ^[1]; Williams, Katherine ^[2]; Voyloy, Dimitry ^[3]; Steren, Carlos A. ^[4]; Goodwin, Andrew ^[4]; Coughlin, E. Bryan ^[2]; Gido, Samuel ^[2]; Beiner, Mario ^[5]; Hong, Kunlun ^[6]; Kang, Nam -Goo ^[4]; Mays, Jimmy ^[7]; Wang, Weiyu ^[4]; White, Benjamin T. ^[4]

Fraunhofer-Institut fur Mikrostruktur con Werkstoffen und Systemen IMWS, Halle (Germany)
Univ. of Massachusetts, Amherst, MA (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Fraunhofer-Institut fur Werkstoffmechanik (Fraunhofer IWM), Germany
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

We present the synthesis and characterization of a new class of high temperature thermoplastic elastomers composed of polybenzofulvene–polyisoprene–polybenzofulvene (FIF) triblock copolymers. All copolymers were prepared by living anionic polymerization in benzene at room temperature. Homopolymerization and effects of additives on the glass transition temperature (T_g) of polybenzofulvene (PBF) were also investigated. Among all triblock copolymers studied, FIF with 14 vol % of PBF exhibited a maximum stress of 14.3 ± 1.3 MPa and strain at break of 1390 ± 66% from tensile tests. The stress–strain curves of FIF-10 and 14 were analyzed by a statistical molecular approach using a nonaffine tube model to estimate the thermoplastic elastomer behavior. Dynamic mechanical analysis showed that the softening temperature of PBF in FIF was 145 °C, much higher than that of thermoplastic elastomers with polystyrene hard blocks. Microphase separation of FIF triblock copolymers was observed by small-angle X-ray scattering, even though long-range order was not achieved under the annealing conditions employed. Additionally, the microphase separation of the resulting triblock copolymers was examined by atomic force microscopy.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1253243

Journal Information:: Macromolecules, Journal Name: Macromolecules Journal Issue: 7 Vol. 49; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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