Unusual temperature dependence of the positron lifetime in a polymer of intrinsic microporosity

Rodrigo Lima de Miranda; Jan Kruse; Klaus Rätzke; Franz Faupel; Detlev Fritsch; Volker Abetz; Peter M. Budd; James D. Selbie; Neil B. McKeown; Bader S. Ghanem

doi:10.1002/pssr.200701116

Unusual temperature dependence of the positron lifetime in a polymer of intrinsic microporosity

Rodrigo Lima de Miranda, Jan Kruse, Klaus Rätzke, Franz Faupel, Detlev Fritsch, Volker Abetz, Peter M. Budd, James D. Selbie, Neil B. McKeown, Bader S. Ghanem

Research output: Contribution to journal › Article › peer-review

Abstract

The performance of polymeric membranes for gas separation is mainly determined by the free volume. Polymers of intrinsic microporosity are interesting due to the high abundance of accessible free volume. We performed measurements of the temperature dependence of the positron lifetime, generally accepted for investigation of free volume, in two polymers of intrinsic microporosity (PIM-1 and PIM-7) in the range from 143 to 523 K. The mean value of the free volume calculated from the ortho-positronium lifetime is in the range of typical values for high free volume polymers. However, the temperature dependence of the local free volume is non-monotonous in contrast to the macroscopic thermal expansion. The explanation is linked to the spirocenters in the polymer. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	190-192
Number of pages	2
Journal	Physica Status Solidi - Rapid Research Letters
Volume	1
Issue number	5
DOIs	https://doi.org/10.1002/pssr.200701116
Publication status	Published - Oct 2007

Keywords

Free volume
Membranes (temp. dependence of free vol. in microporous ladder polymers)
Ladder polymers Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers)
ladder polyimide microporosity free vol positron lifetime

Access to Document

10.1002/pssr.200701116

Cite this

@article{a256f46ab7a14ae78ff50a1a832d71e7,

title = "Unusual temperature dependence of the positron lifetime in a polymer of intrinsic microporosity",

abstract = "The performance of polymeric membranes for gas separation is mainly determined by the free volume. Polymers of intrinsic microporosity are interesting due to the high abundance of accessible free volume. We performed measurements of the temperature dependence of the positron lifetime, generally accepted for investigation of free volume, in two polymers of intrinsic microporosity (PIM-1 and PIM-7) in the range from 143 to 523 K. The mean value of the free volume calculated from the ortho-positronium lifetime is in the range of typical values for high free volume polymers. However, the temperature dependence of the local free volume is non-monotonous in contrast to the macroscopic thermal expansion. The explanation is linked to the spirocenters in the polymer. {\textcopyright} 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.",

keywords = "Free volume, Membranes (temp. dependence of free vol. in microporous ladder polymers), Ladder polymers Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers), ladder polyimide microporosity free vol positron lifetime",

author = "{de Miranda}, {Rodrigo Lima} and Jan Kruse and Klaus R{\"a}tzke and Franz Faupel and Detlev Fritsch and Volker Abetz and Budd, {Peter M.} and Selbie, {James D.} and McKeown, {Neil B.} and Ghanem, {Bader S.}",

note = "CAN 150:78157 36-5 Physical Properties of Synthetic High Polymers Lehrstuhl fuer Materialverbunde,Technische Fakultaet der Christian-Albrechts-Universitaet,Kiel,Germany. Journal 839716-91-5; 839716-92-6 Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (temp. dependence of free vol. in microporous ladder polymers); 676450-48-9P Role: PRP (Properties), SPN (Synthetic preparation), TEM (Technical or engineered material use), PREP (Preparation), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers); 839716-89-1 (PIM-1) Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers)",

year = "2007",

month = oct,

doi = "10.1002/pssr.200701116",

language = "English",

volume = "1",

pages = "190--192",

journal = "Physica Status Solidi - Rapid Research Letters",

issn = "1862-6254",

publisher = "John Wiley & Sons Ltd",

number = "5",

}

TY - JOUR

T1 - Unusual temperature dependence of the positron lifetime in a polymer of intrinsic microporosity

AU - de Miranda, Rodrigo Lima

AU - Kruse, Jan

AU - Rätzke, Klaus

AU - Faupel, Franz

AU - Fritsch, Detlev

AU - Abetz, Volker

AU - Budd, Peter M.

AU - Selbie, James D.

AU - McKeown, Neil B.

AU - Ghanem, Bader S.

N1 - CAN 150:78157 36-5 Physical Properties of Synthetic High Polymers Lehrstuhl fuer Materialverbunde,Technische Fakultaet der Christian-Albrechts-Universitaet,Kiel,Germany. Journal 839716-91-5; 839716-92-6 Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (temp. dependence of free vol. in microporous ladder polymers); 676450-48-9P Role: PRP (Properties), SPN (Synthetic preparation), TEM (Technical or engineered material use), PREP (Preparation), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers); 839716-89-1 (PIM-1) Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers)

PY - 2007/10

Y1 - 2007/10

N2 - The performance of polymeric membranes for gas separation is mainly determined by the free volume. Polymers of intrinsic microporosity are interesting due to the high abundance of accessible free volume. We performed measurements of the temperature dependence of the positron lifetime, generally accepted for investigation of free volume, in two polymers of intrinsic microporosity (PIM-1 and PIM-7) in the range from 143 to 523 K. The mean value of the free volume calculated from the ortho-positronium lifetime is in the range of typical values for high free volume polymers. However, the temperature dependence of the local free volume is non-monotonous in contrast to the macroscopic thermal expansion. The explanation is linked to the spirocenters in the polymer. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - The performance of polymeric membranes for gas separation is mainly determined by the free volume. Polymers of intrinsic microporosity are interesting due to the high abundance of accessible free volume. We performed measurements of the temperature dependence of the positron lifetime, generally accepted for investigation of free volume, in two polymers of intrinsic microporosity (PIM-1 and PIM-7) in the range from 143 to 523 K. The mean value of the free volume calculated from the ortho-positronium lifetime is in the range of typical values for high free volume polymers. However, the temperature dependence of the local free volume is non-monotonous in contrast to the macroscopic thermal expansion. The explanation is linked to the spirocenters in the polymer. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

KW - Free volume

KW - Membranes (temp. dependence of free vol. in microporous ladder polymers)

KW - Ladder polymers Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (temp. dependence of free vol. in microporous ladder polymers)

KW - ladder polyimide microporosity free vol positron lifetime

U2 - 10.1002/pssr.200701116

DO - 10.1002/pssr.200701116

M3 - Article

SN - 1862-6254

VL - 1

SP - 190

EP - 192

JO - Physica Status Solidi - Rapid Research Letters

JF - Physica Status Solidi - Rapid Research Letters

IS - 5

ER -

Unusual temperature dependence of the positron lifetime in a polymer of intrinsic microporosity

Abstract

Keywords

Access to Document

Fingerprint

Cite this