Measuring structural inhomogeneity of a helical conjugated polymer at high pressure and temperature

Tummas Napoleon Arge; Zuzana Konôpková; Dörthe Haase; Hanns-Peter Liermann; Ullrich Scherf; Suchismita Guha; Matti Knaapila

doi:10.1002/polb.24793

Measuring structural inhomogeneity of a helical conjugated polymer at high pressure and temperature

Tummas Napoleon Arge, Zuzana Konôpková, Dörthe Haase, Hanns-Peter Liermann, Ullrich Scherf, Suchismita Guha, Matti Knaapila^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

42 Downloads (Pure)

Abstract

We report on X-ray scattering measurements of helical poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl] by mapping the sample with 10μm spatial resolution from 0.3 GPa to 36 GPa. We follow the strongest 00/reflection, which moves toward higher scattering angles with pressure indicating planarization of helical polyfluorene. Lateral inhomogeneity is increased for >10 GPa concomitant with the solidification of the pressure transmitting medium (a 4:1 mixture of methanol and ethanol). We also follow the 00/reflection with increasing temperature at the constant pressure of 4.3 GPa in neon. We observe a sharp shift toward higher scattering angles indicative of a phase transition at 167–176 °C.

Original language	English
Journal	Journal of Polymer Science. Part B, Polymer Physics
Volume	57
Issue number	7
Pages (from-to)	392-396
ISSN	0887-6266
DOIs	https://doi.org/10.1002/polb.24793
Publication status	Published - 2019

Keywords

Conjugated polymers
Compression
X-ray
High pressure measurements
Polyfluorene

Access to Document

10.1002/polb.24793

FulltextSubmitted manuscript, 352 KB

OpenUrl availability

Full text

Cite this

@article{32451a55b83748cb8e0f28357c8950db,

title = "Measuring structural inhomogeneity of a helical conjugated polymer at high pressure and temperature",

abstract = "We report on X-ray scattering measurements of helical poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl] by mapping the sample with 10μm spatial resolution from 0.3 GPa to 36 GPa. We follow the strongest 00/reflection, which moves toward higher scattering angles with pressure indicating planarization of helical polyfluorene. Lateral inhomogeneity is increased for >10 GPa concomitant with the solidification of the pressure transmitting medium (a 4:1 mixture of methanol and ethanol). We also follow the 00/reflection with increasing temperature at the constant pressure of 4.3 GPa in neon. We observe a sharp shift toward higher scattering angles indicative of a phase transition at 167–176 °C.",

keywords = "Conjugated polymers, Compression, X-ray, High pressure measurements, Polyfluorene",

author = "Arge, {Tummas Napoleon} and Zuzana Kon{\^o}pkov{\'a} and D{\"o}rthe Haase and Hanns-Peter Liermann and Ullrich Scherf and Suchismita Guha and Matti Knaapila",

year = "2019",

doi = "10.1002/polb.24793",

language = "English",

volume = "57",

pages = "392--396",

journal = "Journal of Polymer Science, Part B: Polymer Physics",

issn = "0887-6266",

publisher = "JohnWiley & Sons, Inc.",

number = "7",

}

TY - JOUR

T1 - Measuring structural inhomogeneity of a helical conjugated polymer at high pressure and temperature

AU - Arge, Tummas Napoleon

AU - Konôpková, Zuzana

AU - Haase, Dörthe

AU - Liermann, Hanns-Peter

AU - Scherf, Ullrich

AU - Guha, Suchismita

AU - Knaapila, Matti

PY - 2019

Y1 - 2019

N2 - We report on X-ray scattering measurements of helical poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl] by mapping the sample with 10μm spatial resolution from 0.3 GPa to 36 GPa. We follow the strongest 00/reflection, which moves toward higher scattering angles with pressure indicating planarization of helical polyfluorene. Lateral inhomogeneity is increased for >10 GPa concomitant with the solidification of the pressure transmitting medium (a 4:1 mixture of methanol and ethanol). We also follow the 00/reflection with increasing temperature at the constant pressure of 4.3 GPa in neon. We observe a sharp shift toward higher scattering angles indicative of a phase transition at 167–176 °C.

AB - We report on X-ray scattering measurements of helical poly[9,9-bis(2-ethylhexyl)-fluorene-2,7-diyl] by mapping the sample with 10μm spatial resolution from 0.3 GPa to 36 GPa. We follow the strongest 00/reflection, which moves toward higher scattering angles with pressure indicating planarization of helical polyfluorene. Lateral inhomogeneity is increased for >10 GPa concomitant with the solidification of the pressure transmitting medium (a 4:1 mixture of methanol and ethanol). We also follow the 00/reflection with increasing temperature at the constant pressure of 4.3 GPa in neon. We observe a sharp shift toward higher scattering angles indicative of a phase transition at 167–176 °C.

KW - Conjugated polymers

KW - Compression

KW - X-ray

KW - High pressure measurements

KW - Polyfluorene

U2 - 10.1002/polb.24793

DO - 10.1002/polb.24793

M3 - Journal article

VL - 57

SP - 392

EP - 396

JO - Journal of Polymer Science, Part B: Polymer Physics

JF - Journal of Polymer Science, Part B: Polymer Physics

SN - 0887-6266

IS - 7

ER -

Measuring structural inhomogeneity of a helical conjugated polymer at high pressure and temperature

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this