scholarly journals Solid-State Nuclear Magnetic Resonance (NMR) and Nuclear Magnetic Relaxation Time Analyses of Molecular Mobility and Compatibility of Plasticized Polyhydroxyalkanoates (PHA) Copolymers

Polymers ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 506 ◽  
Author(s):  
Masakazu Nishida ◽  
Tomoko Tanaka ◽  
Yoshio Hayakawa ◽  
Masahiro Nishida
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Relaxation Time ◽  
Solid State ◽  
Magnetic Resonance ◽  
Molecular Mobility ◽  
Magnetic Relaxation ◽  
Nuclear Magnetic Relaxation ◽  
Pha Copolymers ◽  
Nuclear Magnetic

scholarly journals The Use of Solid State NMR to Characterize High Density Polyethylene/Organoclay Nanocomposites

2009 ◽  
Vol 3 (3) ◽  
pp. 187-190
Author(s):  
Tathiane Rodrigues ◽  
◽  
Maria Tavares ◽  
Igor Soares ◽  
Ana Moreira ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Relaxation Time ◽  
Solid State ◽  
Magnetic Resonance ◽  
High Density Polyethylene ◽  
Melt Processing ◽  
Proton Spin ◽  
High Density ◽  
Spin Lattice Relaxation ◽  
Nuclear Magnetic

Recently the development of new materials, in special polymeric nanocomposites, formed by polymer and layered silicates, have gained attention. In this work nanocomposites based on high-density polyethylene matrix (HDPE) and organically modified clay were prepared by melt processing and characterized by the determination of proton spin-lattice relaxation time through solid state nuclear magnetic resonance (NMR) spectroscopy. This work has a proposal to add one quantitative technique to help the researchers to better evaluate polymeric nanocomposite, because NMR is an important tool employed to study both molecular structure and dynamic molecular behavior. The nanocomposites were mixed in a twin-screw extruder, varying the shear rate parameter: 60 and 90 rpm at 463 K. Nanocomposites obtained were characterized through X-ray diffraction; thermal analysis; impact resistance and nuclear magnetic resonance. The T1H results showed that the samples present different molecular domains according to the clay dispersion, forming an intercalated and/or exfoliated nanocomposites. The measurement of relaxation time, using low field NMR, is a useful method to evaluate changes in the molecular mobility of nanocomposite and can infer whether the sample is exfoliated and/or intercalated, since lamellar filler is used.

scholarly journals Search for Axionlike Dark Matter Using Solid-State Nuclear Magnetic Resonance

2021 ◽  
Vol 126 (14) ◽  
Author(s):  
Deniz Aybas ◽  
Janos Adam ◽  
Emmy Blumenthal ◽  
Alexander V. Gramolin ◽  
Dorian Johnson ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Dark Matter ◽  
Solid State ◽  
Magnetic Resonance ◽  
Nuclear Magnetic
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