Aging and Free Volume in a Polymer of Intrinsic Microporosity (PIM-1)

被引：88

作者：

Harms, S. ^{[1
]}

Raetzke, K. ^{[1
]}

Faupel, F. ^{[1
]}

Chaukura, N. ^{[2
]}

Budd, P. M. ^{[2
]}

Egger, W. ^{[3
]}

Ravelli, L. ^{[3
]}

机构：

[1] Univ Kiel, Fac Engn, Inst Mat Sci Multicomponent Mat, D-24143 Kiel, Germany

[2] Univ Manchester, Sch Chem, Manchester, Lancs, England

[3] Univ Armed Forces, Inst Appl Phys & Metrol, Munich, Germany

来源：

JOURNAL OF ADHESION | 2012年 / 88卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

Aging; Free volume; Polymeric membranes; Polymers of intrinsic microporosity; Positron annihilation lifetime spectroscopy; Thin films; TEMPERATURE-DEPENDENCE; GAS SEPARATION; ANNIHILATION; SPECTROSCOPY; LIFETIMES; EPOXIES;

D O I：

10.1080/00218464.2012.682902

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

There is a growing market for polymeric gas separation membranes for applications such as air separation and carbon dioxide capture. One of the key properties dominating transport is the free volume between atoms, allowing gas diffusion. However, thin films, in particular, undergo aging, decreasing free volume, and, hence, performance with time. We have measured the change in free volume during aging of thin films of a polymer of intrinsic microporosity (PIM-1) by depth-resolved positron annihilation lifetime spectroscopy. For films with thickness, d, smaller than 1 mu m, aging is nearly complete after 3 months, whereas for films with d>1 mu m aging continues even after several months. Aging is thickness-and time-dependent and the free volume diffuses through the film to the free surface.

引用

页码：608 / 619

页数：12

共 30 条

[1] Median implantation depth and implantation profile of 3-18 keV positrons in amorphous polymers -: art. no. 125404 [J].

Algers, J ;

Sperr, P ;

Egger, W ;

Kögel, G ;

Maurer, FHJ .

PHYSICAL REVIEW B, 2003, 67 (12)

[2] Highly permeable polymers for gas separation membranes [J].

Budd, Peter M. ;

McKeown, Neil B. .

POLYMER CHEMISTRY, 2010, 1 (01) :63-68

[3] Gas permeation parameters and other physicochemical properties of a polymer of intrinsic microporosity: Polybenzodioxane PIM-1 [J].

Budd, Peter M. ;

McKeown, Neil B. ;

Ghanem, Bader S. ;

Msayib, Kadhum J. ;

Fritsch, Detlev ;

Starannikova, Ludmila ;

Belov, Nikolai ;

Sanfirova, Olga ;

Yampolskii, Yuri ;

Shantarovich, Victor .

JOURNAL OF MEMBRANE SCIENCE, 2008, 325 (02) :851-860

[4] Polymers of intrinsic microporosity (PIMs): robust, solution-processable, organic nanoporous materials [J].

Budd, PM ;

Ghanem, BS ;

Makhseed, S ;

McKeown, NB ;

Msayib, KJ ;

Tattershall, CE .

CHEMICAL COMMUNICATIONS, 2004, (02) :230-231

[5] Physical aging of polycarbonate far below the glass transition temperature:: Evidence for the diffusion mechanism -: art. no. 224213 [J].

Cangialosi, D ;

Wübbenhorst, M ;

Groenewold, J ;

Mendes, E ;

Schut, H ;

van Veen, A ;

Picken, SJ .

PHYSICAL REVIEW B, 2004, 70 (22) :224213-1

[6]

Crank J., 1979, MATH DIFFUSION, V2nd

[7] Unusual temperature dependence of the positron lifetime in a polymer of intrinsic microporosity [J].

de Miranda, Rodrigo Lima ;

Kruse, Jan ;

Raetzke, Klaus ;

Faupel, Franz ;

Fritsch, Detlev ;

Abetz, Volker ;

Budd, Peter M. ;

Selbie, James D. ;

McKeown, Neil B. ;

Ghanem, Bader S. .

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 2007, 1 (05) :190-192

[8] Pulsed low-energy positron beams in materials sciences [J].

Egger, W. .

PHYSICS WITH MANY POSITRONS, 2010, 174 :419-449

[9] THE TEMPERATURE-DEPENDENCE OF POSITRON LIFETIMES IN SOLID PIVALIC ACID [J].

ELDRUP, M ;

LIGHTBODY, D ;

SHERWOOD, JN .

CHEMICAL PHYSICS, 1981, 63 (1-2) :51-58

[10] Free Volume Investigation of Polymers of Intrinsic Microporosity (PIMs): PIM-1 and PIM1 Copolymers Incorporating Ethanoanthracene Units [J].

Emmler, Thomas ;

Heinrich, Kathleen ;

Fritsch, Detlev ;

Budd, Peter M. ;

Chaukura, Nhamo ;

Ehlers, Dennis ;

Ratzke, Klaus ;

Faupel, Franz .

MACROMOLECULES, 2010, 43 (14) :6075-6084

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