1
|
Zaręba J, Jenczyk J, Dobies M, Makrocka-Rydzyk M, Woźniak-Braszak A, Jarek M, Jancelewicz M, Banaszak M. Block copolymer interfaces investigated by means of NMR, atomic force microscopy and dielectric spectroscopy. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
2
|
Jenczyk J, Woźniak-Budych M, Jarek M, Jurga S. Structural and dynamical study of PDMS and PS based block copolymers. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2017.11.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Jenczyk J, Jurga S. Complementary studies of NMR spin diffusion and atomic force microscopy – Structural characterization of diblock copolymers. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
4
|
Schäler K, Roos M, Micke P, Golitsyn Y, Seidlitz A, Thurn-Albrecht T, Schneider H, Hempel G, Saalwächter K. Basic principles of static proton low-resolution spin diffusion NMR in nanophase-separated materials with mobility contrast. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2015; 72:50-63. [PMID: 26404771 DOI: 10.1016/j.ssnmr.2015.09.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/28/2015] [Accepted: 09/01/2015] [Indexed: 06/05/2023]
Abstract
We review basic principles of low-resolution proton NMR spin diffusion experiments, relying on mobility differences in nm-sized phases of inhomogeneous organic materials such as block-co- or semicrystalline polymers. They are of use for estimates of domain sizes and insights into nanometric dynamic inhomogeneities. Experimental procedures and limitations of mobility-based signal decomposition/filtering prior to spin diffusion are addressed on the example of as yet unpublished data on semicrystalline poly(ϵ-caprolactone), PCL. Specifically, we discuss technical aspects of the quantitative, dead-time free detection of rigid-domain signals by aid of the magic-sandwich echo (MSE), and magic-and-polarization-echo (MAPE) and double-quantum (DQ) magnetization filters to select rigid and mobile components, respectively. Such filters are of general use in reliable fitting approaches for phase composition determinations. Spin diffusion studies at low field using benchtop instruments are challenged by rather short (1)H T1 relaxation times, which calls for simulation-based analyses. Applying these, in combination with domain sizes as determined by small-angle X-ray scattering, we have determined spin diffusion coefficients D for PCL (0.34, 0.19 and 0.032nm(2)/ms for crystalline, interphase and amorphous parts, respectively). We further address thermal-history effects related to secondary crystallization. Finally, the state of knowledge concerning the connection between D values determined locally at the atomic level, using (13)C detection and CP- or REDOR-based "(1)H hole burning" procedures, and those obtained by calibration experiments, is summarized. Specifically, the non-trivial dependence of D on the magic-angle spinning (MAS) frequency, with a minimum under static and a local maximum under moderate-MAS conditions, is highlighted.
Collapse
Affiliation(s)
- Kerstin Schäler
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Matthias Roos
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Peter Micke
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Yury Golitsyn
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Anne Seidlitz
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Thomas Thurn-Albrecht
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Horst Schneider
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Günter Hempel
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany
| | - Kay Saalwächter
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany.
| |
Collapse
|
5
|
Andriani Y, Jack KS, Gilbert EP, Edwards GA, Schiller TL, Strounina E, Osman AF, Martin DJ. Organization of mixed dimethyldioctadecylammonium and choline modifiers on the surface of synthetic hectorite. J Colloid Interface Sci 2013; 409:72-9. [DOI: 10.1016/j.jcis.2013.07.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 07/21/2013] [Indexed: 10/26/2022]
|
6
|
Alonso B, Mineva T, Innocenzi P, Trimmel G, Stubenrauch K, Melnyk I, Zub Y, Fayon F, Florian P, Massiot D. Perspectives in 1H, 14N and 81Br solid-state NMR studies of interfaces in materials textured by self-assembled amphiphiles. CR CHIM 2010. [DOI: 10.1016/j.crci.2009.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
7
|
Singla S, Beckham HW. Miscible Blends of Cyclic Poly(oxyethylene) in Linear Polystyrene. Macromolecules 2008. [DOI: 10.1021/ma800327c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Swati Singla
- School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0295
| | - Haskell W. Beckham
- School of Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0295
| |
Collapse
|
8
|
Mauri M, Thomann Y, Schneider H, Saalwächter K. Spin-diffusion NMR at low field for the study of multiphase solids. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2008; 34:125-141. [PMID: 18692367 DOI: 10.1016/j.ssnmr.2008.07.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Accepted: 07/01/2008] [Indexed: 05/26/2023]
Abstract
The use of spin-diffusion NMR for the measurement of domain sizes in multiphase materials is becoming increasingly popular, in particular for the study of heterogeneous polymers. Under conditions where T(1) relaxation can be neglected, which is mostly the case at high field, analytical and approximate solutions to the evolution of spin diffusion are available. In order to extend the technique to more general conditions, we performed a comprehensive study of the diffusion of magnetization in a model copolymer at low field, where T(1) tends to be of the same order of magnitude as the typical spin-diffusion time. In order to study the effects of T(1) and to delineate the optimal T(1) values for back correction prior to applying the initial-rate approximation, we developed a numerical simulation based on the diffusion equation and including longitudinal relaxation. We present and discuss the limits of simple correction strategies for initial-slope analysis based on apparent relaxation times from saturation-recovery experiments or the spin-diffusion experiments themselves. Our best strategy faithfully reproduces domain sizes obtained by both TEM investigations and full simultaneous fitting of spin-diffusion and saturation-recovery curves. Full fitting of such independent data sets not only yields correct domain sizes, but also the true longitudinal relaxation times, as well as spin-diffusion coefficients. Effects of interphases with distinct mobility on spin-diffusion curves, as well as practical hints concerning the reliable component decomposition of the detected low-resolution FID signal by help of different magnetization filters are also discussed in detail.
Collapse
Affiliation(s)
- M Mauri
- Institut für Physik, Martin-Luther Universität Halle-Wittenberg, Friedemann-Bach-Platz 6, D-06108 Halle, Germany
| | | | | | | |
Collapse
|
9
|
Li X, Fu W, Wang Y, Chen T, Liu X, Lin H, Sun P, Jin Q, Ding D. Solid-state NMR characterization of unsaturated polyester thermoset blends containing PEO–PPO–PEO block copolymers. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.04.042] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
10
|
Meurer B, Weill G. Measurement of Spin Diffusion Coefficients in Glassy Polymers: Failure of a Simple Scaling Law. MACROMOL CHEM PHYS 2008. [DOI: 10.1002/macp.200700297] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
11
|
Hucher C, Eustache RP, Beaume F, Tekely P. Motional Heterogeneity in Poly(ether-block-amide) Copolymers As Revealed by Solid-State NMR. Macromolecules 2005. [DOI: 10.1021/ma051625q] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Catherine Hucher
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| | - René-Paul Eustache
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| | - François Beaume
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| | - Piotr Tekely
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| |
Collapse
|
12
|
Sun P, Dang Q, Li B, Chen T, Wang Y, Lin H, Jin Q, Ding D, Shi AC. Mobility, Miscibility, and Microdomain Structure in Nanostructured Thermoset Blends of Epoxy Resin and Amphiphilic Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Triblock Copolymers Characterized by Solid-State NMR. Macromolecules 2005. [DOI: 10.1021/ma0505979] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pingchuan Sun
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Qinqin Dang
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Baohui Li
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Tiehong Chen
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Yinong Wang
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Hai Lin
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Qinghua Jin
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - Datong Ding
- Key Laboratory of Functional Polymer Materials for Adsorption and Separation, College of Chemistry and College of Physics, Nankai University, Tianjin, 300071, China
| | - An-Chang Shi
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| |
Collapse
|
13
|
Buda A, Demco DE, Bertmer M, Blümich B, Reining B, Keul H, Höcker H. Domain sizes in heterogeneous polymers by spin diffusion using single-quantum and double-quantum dipolar filters. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2003; 24:39-67. [PMID: 12850256 DOI: 10.1016/s0926-2040(03)00020-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
1H spin-diffusion experiments employing a double-quantum (DQ) dipolar filter were performed for the characterization of the microdomain structure of heterogeneous samples. For this purpose the NMR spin-diffusion process was analysed based on a model morphology of three different domains with arbitrary sizes, diffusivities, and filter efficiency. General analytical solutions for z magnetization source and sink were obtained valid for a one-dimensional lamellar morphology in the full range of spin-diffusion times. These solutions of the spin-diffusion equations were used for determining the crystalline, interface, and amorphous domain sizes in polystyrene-poly(ethylene oxide) (PS-PEO) and poly(hydroxyethylmethacrylate)-poly(ethylene oxide) (PHEMA-PEO). The DQ dipolar filter has a good efficiency for PS-PEO but is only partially efficient in filtering the signal of the mobile domains in the PHEMA-PEO diblock copolymer. The domain sizes measured by the DQ filter method are compared to those obtained using the traditional dipolar filter creating z magnetization in the mobile domains.
Collapse
Affiliation(s)
- A Buda
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany
| | | | | | | | | | | | | |
Collapse
|
14
|
Hill DJT, Markotsis M, Whittaker AK, Wong KW. NMR characterization of blends of poly(hydroxybutyrate-co-hydroxyvalerate) with poly(vinyl acetate). POLYM INT 2003. [DOI: 10.1002/pi.1289] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
15
|
Werkhoven TM, Mulder FM, Zune C, Jérôme R, de Groot HJM. Determination of Polyisoprene-block-poly(methyl methacrylate) Domain Sizes Using1H Spin Diffusion. MACROMOL CHEM PHYS 2003. [DOI: 10.1002/macp.200290060] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
16
|
Cheung MK, Wan KP, Yu PH. Miscibility and morphology of chiral semicrystalline poly-(R)-(3-hydroxybutyrate)/chitosan and poly-(R)-(3-hydroxybutyrate-co-3-hydroxyvalerate)/chitosan blends studied with DSC,1HT1 andT1? CRAMPS. J Appl Polym Sci 2002. [DOI: 10.1002/app.11091] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
17
|
Valiullin R, Furó I. The morphology of coexisting liquid and frozen phases in porous materials as revealed by exchange of nuclear spin magnetization followed by 1H nuclear magnetic resonance. J Chem Phys 2002. [DOI: 10.1063/1.1488585] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
18
|
Tekely P, Gardiennet C, Potrzebowski MJ, Sebald A, Reichert D, Luz Z. Probing molecular geometry of solids by nuclear magnetic resonance spin exchange at the n=0 rotational-resonance condition. J Chem Phys 2002. [DOI: 10.1063/1.1465416] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
19
|
Eaton SS, Eaton GR. Relaxation Times of Organic Radicals and Transition Metal Ions. DISTANCE MEASUREMENTS IN BIOLOGICAL SYSTEMS BY EPR 2002. [DOI: 10.1007/0-306-47109-4_2] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
20
|
Yu H, Natansohn A, Singh MA, Torriani I. Solid-State NMR and Small-Angle X-ray Scattering Study of Microphase Structure of Amorphous and Semicrystalline Poly(styrene−ethylene oxide) Diblock Copolymers. Macromolecules 2001. [DOI: 10.1021/ma001127b] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongshi Yu
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| | - Almeria Natansohn
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| | - Marsha A. Singh
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| | - Iris Torriani
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| |
Collapse
|
21
|
Neagu C, Puskas JE, Singh MA, Natansohn A. Domain Sizes Determination for Styrene−Isobutylene Block Copolymer Systems Using Solid-State NMR Spectroscopy. Macromolecules 2000. [DOI: 10.1021/ma991974i] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claudiu Neagu
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Chemical and Bio-Chemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B8; and Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Judit E. Puskas
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Chemical and Bio-Chemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B8; and Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Marsha A. Singh
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Chemical and Bio-Chemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B8; and Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Almeria Natansohn
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Chemical and Bio-Chemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B8; and Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| |
Collapse
|
22
|
Beshah K, Molnar LK. Characterization of Interface Structures and Morphologies of Heterogeneous Polymers: A Solid-State 1H NMR Study. Macromolecules 2000. [DOI: 10.1021/ma990311y] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kebede Beshah
- Rohm and Haas Research Laboratories, 727 Norristown Road, Spring House, Pennsylvania 19477
| | - Linda K. Molnar
- Rohm and Haas Research Laboratories, 727 Norristown Road, Spring House, Pennsylvania 19477
| |
Collapse
|
23
|
Yu H, Natansohn A, Singh MA, Plivelíc T. A Comparative Study Using Small-Angle X-ray Scattering and Solid-State NMR of Microdomain Structures in Poly(styrene−butadiene−styrene) Triblock Copolymers. Macromolecules 1999. [DOI: 10.1021/ma9910585] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hongshi Yu
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| | - Almeria Natansohn
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| | - Marsha A. Singh
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| | - Tomas Plivelíc
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6; Department of Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6; and National Synchrotron Light Laboratory (LNLS)/CNPq, Campinas, SP, Brazil
| |
Collapse
|
24
|
Hill DJT, Whittaker AK, Wong KW. Miscibility and Specific Interactions in Blends of Poly(4-vinylphenol) and Poly(2-ethoxyethyl methacrylate). Macromolecules 1999. [DOI: 10.1021/ma990357r] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David J. T. Hill
- Polymer Materials and Radiation Group, Department of Chemistry, Centre for Magnetic Resonance, University of Queensland, Q4072, Australia
| | - Andrew K. Whittaker
- Polymer Materials and Radiation Group, Department of Chemistry, Centre for Magnetic Resonance, University of Queensland, Q4072, Australia
| | - Kathy W. Wong
- Polymer Materials and Radiation Group, Department of Chemistry, Centre for Magnetic Resonance, University of Queensland, Q4072, Australia
| |
Collapse
|
25
|
Yu H, Wang J, Natansohn A, Singh MA. Microphase Structures of Poly(styrene-b-ethylene/propylene) Diblock Copolymers Investigated by Solid-State NMR and Small-Angle X-ray Scattering Techniques. Macromolecules 1999. [DOI: 10.1021/ma990106i] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongshi Yu
- Departments of Chemistry and Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Jiahu Wang
- Departments of Chemistry and Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Almeria Natansohn
- Departments of Chemistry and Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Marsha A. Singh
- Departments of Chemistry and Physics, Queen's University, Kingston, Ontario, Canada K7L 3N6
| |
Collapse
|
26
|
Afif A, Hommel H, Legrand AP, Bacquet M, Gailliez-Degremont E, Morcellet M. Molecular Conformation and Mobility of Polyamines Adsorbed on Silica Studied by Spin Labeling. J Colloid Interface Sci 1999; 211:304-314. [PMID: 10049546 DOI: 10.1006/jcis.1998.5989] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Poly(ethyleneimine) and poly(4-vinylpyridine) chains adsorbed on Nucleosil silica have been randomly labeled with nitroxide free radicals. The EPR signal is very sensitive to the molecular Brownian motion of the segments and shows generally at least two different environments: trains adsorbed on the surface with a restricted mobility, and loops and tails protruding into the solution with a fast motion. The rotational correlation times and the relative fraction of each population are given as functions of the coverage achieved and of the specific surface area of the silica for the samples in contact with methanol and sometimes water. The overall picture is consistent with a diffuse layer for the PEI and a more compact one with some heterogeneities for the P4VP. Copyright 1999 Academic Press.
Collapse
Affiliation(s)
- A Afif
- Laboratoire de Physique Quantique, URA 1428 C.N.R.S., E.S.P.C.I., 10, rue Vauquelin, Paris Cedex 05, 75231, France
| | | | | | | | | | | |
Collapse
|
27
|
Jack KS, Wang J, Natansohn A, Register RA. Characterization of the Microdomain Structure in Polystyrene−Polyisoprene Block Copolymers by 1H Spin Diffusion and Small-Angle X-ray Scattering Methods. Macromolecules 1998. [DOI: 10.1021/ma971436a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kevin S. Jack
- Department of Chemistry, Queens University, Kingston, Ontario, Canada K7L 3N6, and Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Jiahu Wang
- Department of Chemistry, Queens University, Kingston, Ontario, Canada K7L 3N6, and Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Almeria Natansohn
- Department of Chemistry, Queens University, Kingston, Ontario, Canada K7L 3N6, and Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544
| | - Richard A. Register
- Department of Chemistry, Queens University, Kingston, Ontario, Canada K7L 3N6, and Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544
| |
Collapse
|