1
|
Understanding the molecular origin of the superior toughness of polyamide-6/polyketone blends by solid-state NMR spectroscopy. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
2
|
Gabrielli V, Kuraite A, da Silva MA, Edler KJ, Angulo J, Nepravishta R, Muñoz-García JC, Khimyak YZ. Spin diffusion transfer difference (SDTD) NMR: An advanced method for the characterisation of water structuration within particle networks. J Colloid Interface Sci 2021; 594:217-227. [PMID: 33756365 DOI: 10.1016/j.jcis.2021.02.094] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/13/2021] [Accepted: 02/23/2021] [Indexed: 11/26/2022]
Abstract
HYPOTHESIS The classical STD NMR protocol to monitor solvent interactions in gels is strongly dependent on gelator and solvent concentrations and does not report on the degree of structuration of the solvent at the particle/solvent interface. We hypothesised that, for suspensions of large gelator particles, solvent structuration could be characterised by STD NMR when taking into account the particle-to-solvent 1H-1H spin diffusion transfer using the 1D diffusion equation. EXPERIMENTS We have carried out a systematic study on effect of gelator and solvent concentrations, and gelator surface charge, affecting the behaviour of the classical STD NMR build-up curves. To do so, we have characterised solvent interactions in dispersions of starch and cellulose-like particles prepared in deuterated water and alcohol/D2O mixtures. FINDINGS The Spin Diffusion Transfer Difference (SDTD) NMR protocol is independent of the gelator and solvent concentrations, hence allowing the estimation of the degree of solvent structuration within different particle networks. In addition, the simulation of SDTD build-up curves using the general one-dimensional diffusion equation allows the determination of minimum distances (r) and spin diffusion rates (D) at the particle/solvent interface. This novel NMR protocol can be readily extended to characterise the solvent(s) organisation in any type of colloidal systems constituted by large particles.
Collapse
Affiliation(s)
- Valeria Gabrielli
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Agne Kuraite
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | | | - Karen J Edler
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Jesús Angulo
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Ridvan Nepravishta
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
| | - Juan C Muñoz-García
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
| | - Yaroslav Z Khimyak
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
| |
Collapse
|
3
|
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]
|
4
|
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]
|
5
|
Roos M, Micke P, Saalwächter K, Hempel G. Moderate MAS enhances local (1)H spin exchange and spin diffusion. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2015; 260:28-37. [PMID: 26397218 DOI: 10.1016/j.jmr.2015.08.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 08/13/2015] [Accepted: 08/28/2015] [Indexed: 05/17/2023]
Abstract
Proton NMR spin-diffusion experiments are often combined with magic-angle spinning (MAS) to achieve higher spectral resolution of solid samples. Here we show that local proton spin diffusion can indeed become faster at low (<10 kHz) spinning rates as compared to static conditions. Spin diffusion under static conditions can thus be slower than the often referred value of 0.8 nm(2)/ms, which was determined using slow MAS (Clauss et al., 1993). The enhancement of spin diffusion by slow MAS relies on the modulation of the orientation-dependent dipolar couplings during sample rotation and goes along with transient level crossings in combination with dipolar truncation. The experimental finding and its explanation is supported by density matrix simulations, and also emphasizes the sensitivity of spin diffusion to the local coupling topology. The amplification of spin diffusion by slow MAS cannot be explained by any model based on independent spin pairs; at least three spins have to be considered.
Collapse
Affiliation(s)
- Matthias Roos
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle (Saale), Germany.
| | - Peter Micke
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle (Saale), Germany
| | - Kay Saalwächter
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle (Saale), Germany
| | - Günter Hempel
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Betty-Heimann-Str. 7, 06120 Halle (Saale), Germany.
| |
Collapse
|
6
|
Meyer HW, Schneider H, Saalwächter K. Proton NMR spin-diffusion studies of PS-PB block copolymers at low field: two- vs three-phase model and recalibration of spin-diffusion coefficients. Polym J 2012. [DOI: 10.1038/pj.2012.88] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
7
|
Baias M, Demco DE, Istrate D, Popescu C, Blümich B, Möller M. Morphology and molecular mobility of fibrous hard alpha-keratins by 1H, 13C, and 129Xe NMR. J Phys Chem B 2009; 113:12136-47. [PMID: 19658418 DOI: 10.1021/jp904484r] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The morphology and molecular mobility changes of the side chains for hard alpha-keratin due to oxidative and reductive/oxidative treatments for temperatures around the DSC denaturation peak were investigated by (1)H, (13)C, and (129)Xe NMR spectroscopy and (1)H spin diffusion. Proton wide-line spectra were used to obtain the phase composition (rigid, interface, and amorphous fractions) and molecular dynamics of each phase. Proton spin diffusion experiments using a double-quantum filter and initial rate approximation were employed to obtain the dependence of the rigid domain sizes on chemical treatments and denaturation temperatures. A drastic reduction in the rigid domain thickness takes place for the reductive/oxidative treatment. The keratin mobility gradient in the interfacial region at different denaturation temperatures was measured for hard alpha-keratin from (1)H spin diffusion data. (13)C CPMAS spectra were used to provide a detailed examination of the effects of the chemical treatments especially on the disulfide bonds. Thermally polarized (129)Xe spectra suggest the existence of voids in the hard alpha-keratin induced by the reductive and oxidative treatment. The surface of the hard alpha-keratin fiber surface is probed by the laser hyperpolarized (129)Xe. A qualitative model describing the changes induced in hard alpha-keratin protein by chemical transformation was developed and could be correlated with the changes in domain thickness, phase composition, and molecular dynamics.
Collapse
Affiliation(s)
- Maria Baias
- DWI an der RWTH Aachen, D-52056 Aachen, Germany
| | | | | | | | | | | |
Collapse
|
8
|
Baias M, Demco DE, Popescu C, Fechete R, Melian C, Blümich B, Möller M. Thermal Denaturation of Hydrated Wool Keratin by 1H Solid-State NMR. J Phys Chem B 2009; 113:2184-92. [DOI: 10.1021/jp8094616] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria Baias
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| | - Dan E. Demco
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| | - Crisan Popescu
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| | - Radu Fechete
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| | - Claudiu Melian
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| | - Bernhard Blümich
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| | - Martin Möller
- DWI an der RWTH-Aachen University, Pauwelsstrasse 8, D-52056 Aachen, Germany, Institut für Technische and Makromolekulare Chemie, RWTH Aachen University, Worringer Weg 1, D-52074 Aachen, Germany, Department of Physics, Technical University Cluj-Napoca, RO-400020 Cluj-Napoca, Romania, and University “Aurel Vlaicu” Arad, Bd. Revolutiei 77, RO-310130 Arad, Romania
| |
Collapse
|
9
|
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
|
10
|
Jia Z, Zhang L, Chen Q, Hansen EW. Proton Spin Diffusion in Polyethylene as a Function of Magic-Angle Spinning Rate. A Phenomenological Approach. J Phys Chem A 2008; 112:1228-33. [DOI: 10.1021/jp077067u] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhenlong Jia
- Physics Department and the State Key Laboratory of Precision Spectroscopy Laboratory for Optics and Magnetic Resonance Spectroscopy, East China Normal University, 3663 Northern Zhongshan Road, Shanghai 200062, People's Republic of China, and University of Oslo, Department of Chemistry, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Lili Zhang
- Physics Department and the State Key Laboratory of Precision Spectroscopy Laboratory for Optics and Magnetic Resonance Spectroscopy, East China Normal University, 3663 Northern Zhongshan Road, Shanghai 200062, People's Republic of China, and University of Oslo, Department of Chemistry, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Qun Chen
- Physics Department and the State Key Laboratory of Precision Spectroscopy Laboratory for Optics and Magnetic Resonance Spectroscopy, East China Normal University, 3663 Northern Zhongshan Road, Shanghai 200062, People's Republic of China, and University of Oslo, Department of Chemistry, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - E. W. Hansen
- Physics Department and the State Key Laboratory of Precision Spectroscopy Laboratory for Optics and Magnetic Resonance Spectroscopy, East China Normal University, 3663 Northern Zhongshan Road, Shanghai 200062, People's Republic of China, and University of Oslo, Department of Chemistry, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| |
Collapse
|
11
|
Demco DE, Litvinov VM, Rata G, Popescu C, Phan KH, Schmidt A, Blümich B. Investigation of Thermal Aging of Polyamide 4,6 by1H Solid-State NMR. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200700095] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
12
|
Voda MA, Demco DE, Voda A, Schauber T, Adler M, Dabisch T, Adams A, Baias M, Blümich B. Morphology of Thermoplastic Polyurethanes by 1H Spin-Diffusion NMR. Macromolecules 2006. [DOI: 10.1021/ma060335m] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mihai A. Voda
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Dan E. Demco
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Alexandra Voda
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Thomas Schauber
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Matthias Adler
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Thomas Dabisch
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Alina Adams
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Maria Baias
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| | - Bernhard Blümich
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; Freudenberg Forschungsdienste KG, D-69465 Weinheim, Germany; and Merkel Freudenberg Fluidtechnic GmbH, D-34613, Germany
| |
Collapse
|
13
|
Thurecht KJ, Hill DJT, Preston CML, Rintoul L, White JW, Whittaker AK. Determination of Domain Sizes in Blends of Poly(ethylene) and Poly(styrene) Formed in the Presence of Supercritical Carbon Dioxide. Macromolecules 2004. [DOI: 10.1021/ma0492622] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kristofer J. Thurecht
- Centre for Magnetic Resonance and Department of Chemistry, University of Queensland; School of Engineering, RMIT University; School of Physical Sciences, Queensland University of Technology; and Research School of Chemistry, Australian National University
| | - David J. T. Hill
- Centre for Magnetic Resonance and Department of Chemistry, University of Queensland; School of Engineering, RMIT University; School of Physical Sciences, Queensland University of Technology; and Research School of Chemistry, Australian National University
| | - Christopher M. L. Preston
- Centre for Magnetic Resonance and Department of Chemistry, University of Queensland; School of Engineering, RMIT University; School of Physical Sciences, Queensland University of Technology; and Research School of Chemistry, Australian National University
| | - Llew Rintoul
- Centre for Magnetic Resonance and Department of Chemistry, University of Queensland; School of Engineering, RMIT University; School of Physical Sciences, Queensland University of Technology; and Research School of Chemistry, Australian National University
| | - John W. White
- Centre for Magnetic Resonance and Department of Chemistry, University of Queensland; School of Engineering, RMIT University; School of Physical Sciences, Queensland University of Technology; and Research School of Chemistry, Australian National University
| | - Andrew K. Whittaker
- Centre for Magnetic Resonance and Department of Chemistry, University of Queensland; School of Engineering, RMIT University; School of Physical Sciences, Queensland University of Technology; and Research School of Chemistry, Australian National University
| |
Collapse
|
14
|
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
|
15
|
Buda A, Demco DE, Bertmer M, Blümich B, Litvinov VM, Penning JP. General Analytical Description of Spin-Diffusion for a Three-Domain Morphology. Application to Melt-Spun Nylon 6 Fibers. J Phys Chem B 2003. [DOI: 10.1021/jp021684v] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Buda
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - D. E. Demco
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - M. Bertmer
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - B. Blümich
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - V. M. Litvinov
- DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - J. P. Penning
- DSM Fiber Intermediates, P.O. Box 18, 6160 MD Geleen, The Netherlands
| |
Collapse
|
16
|
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]
|
17
|
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
|
18
|
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
|
19
|
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
|
20
|
Affiliation(s)
- T. T. P. Cheung
- Phillips Petroleum Company, Phillips Research Center, Bartlesville, Oklahoma 74004
| |
Collapse
|
21
|
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
|
22
|
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
|
23
|
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
|
24
|
Wang J, Jack KS, Natansohn AL. Spin diffusion and spin-lattice relaxation in multiphase polymers. J Chem Phys 1997. [DOI: 10.1063/1.474430] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|