Thermosetting Mechanism Study of Organosilicon Polymer Containing Carborane by Solid-State NMR Spectroscopy

1999 ◽  
Vol 576 ◽  
Author(s):  
H. Kimura ◽  
K. Okita ◽  
M. Ichitani ◽  
M. Yonezawa ◽  
T. Sugimoto
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Main Chain ◽  
Addition Reaction ◽  
Side Chain ◽  
Mechanism Study ◽  
Nmr Method ◽  
Organosilicon Polymer ◽  
Thermal Stable

ABSTRACTThe thermosetting mechanism of an organosilicon polymer containing carborane has been studied utilizing the 13and 29Si solid-state NMR method. The polymer having C≡C bonds in the main chain and CH═CH2, Si-H bonds, and carborane in the bulky side chain, shows a very highly thermal stability in air by curing. From 13C and 29Si NMR spectra of the polymer, it was found that the intermolecular cross-linking reactions of the polymer was due to (1) the diene reaction between Ph-C≡C and C≡C and (2) the addition reaction between side chain terminal and Ph-C≡C and between CH═CH2 and Si–H, and a very highly thermal stable structure is formed.

scholarly journals Integrated analysis of solid-state NMR spectra and nuclear magnetic relaxation times for the phenol formaldehyde (PF) resin impregnation process into soft wood

RSC Advances ◽  
2017 ◽  
Vol 7 (86) ◽  
pp. 54532-54541 ◽  
Author(s):  
Masakazu Nishida ◽  
Tomoko Tanaka ◽  
Tsunehisa Miki ◽  
Yoshio Hayakawa ◽  
Kozo Kanayama
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Magnetic Relaxation ◽  
Nmr Spectra ◽  
Phenol Formaldehyde ◽  
Relaxation Times ◽  
Integrated Analysis ◽  
Carbohydrate Polymers ◽  
Nmr Method ◽  
Resin Impregnation

Integrated analysis using a solid-state NMR method revealed that PF resin permeated not only lignin but also carbohydrate polymers.

Side Chain Resonances in Static Oriented Proton-Decoupled15N Solid-State NMR Spectra of Membrane Proteins

2009 ◽  
Vol 131 (18) ◽  
pp. 6340-6341 ◽  
Author(s):  
Christopher Aisenbrey ◽  
Lydia Prongidi-Fix ◽  
Alexandre Chenal ◽  
Daniel Gillet ◽  
Burkhard Bechinger
Keyword(s):  
Solid State ◽  
Membrane Proteins ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Side Chain

Solid state NMR spectra of rapidly quenched superionic glasses composed of two lithium ortho-oxosalts

1996 ◽  
Vol 86-88 ◽  
pp. 535-538 ◽  
Author(s):  
Masanari Takahashi ◽  
Hiroshi Toyuki ◽  
Masahiro Tatsumisago ◽  
Tsutomu Minami
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra

Solid State NMR Spectra of Tall Fescue Seed

1997 ◽  
pp. 255-256 ◽  
Author(s):  
J. F. Green ◽  
K. D. Gwinn ◽  
G. W. Kabalka ◽  
C. L. Anderson
Keyword(s):  
Solid State ◽  
Tall Fescue ◽  
Solid State Nmr ◽  
Nmr Spectra

scholarly journals Corrigendum: Solid-State NMR Measurements of Asymmetric Dipolar Couplings Provide Insight into Protein Side-Chain Motion

2012 ◽  
Vol 51 (40) ◽  
pp. 9959-9959
Author(s):  
Paul Schanda ◽  
Matthias Huber ◽  
Jérôme Boisbouvier ◽  
Beat H. Meier ◽  
Matthias Ernst
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Dipolar Couplings ◽  
Side Chain ◽  
Side Chain Motion ◽  
Insight Into

scholarly journals Combining solid-state NMR spectroscopy with first-principles calculations – a guide to NMR crystallography

2016 ◽  
Vol 52 (45) ◽  
pp. 7186-7204 ◽  
Author(s):  
Sharon E. Ashbrook ◽  
David McKay
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Dft Calculations ◽  
First Principles ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
First Principles Calculations ◽  
Recent Developments ◽  
Future Potential ◽  
Nmr Crystallography

DFT calculations are an important tool in assigning and interpreting NMR spectra of solids: we discuss recent developments and their future potential in the context of NMR crystallography.

Solid State Carbon-13 NMR Studies of Vulcanized Elastomers. II, Sulfur Vulcanization of Natural Rubber

1987 ◽  
Vol 60 (2) ◽  
pp. 252-277 ◽  
Author(s):  
A. M. Zaper ◽  
J. L. Koenig
Keyword(s):  
Solid State ◽  
Nmr Spectra ◽  
Molecular Motion ◽  
Main Chain ◽  
Repeat Unit ◽  
Crosslinking Agent ◽  
Nmr Studies ◽  
Structural Modifications ◽  
Chain Isomerization ◽  
Cyclic Sulfide

Abstract In summary, the solid-state C-13 NMR technique has proven to be a significant method for the detection of crosslinks and other structural modifications in sulfur-vulcanized NR systems. The use of sulfur as a crosslinking agent by itself generates a considerable amount of main-chain structural modifications. Cyclic sulfide structures and cis-to-trans chain isomerization are detected in addition to polysulfidic crosslinks which are found attached to different carbons of the NR repeat unit. The phenomenon of reversion has also been detected in this study. The nature of the spectral broadening in the NMR spectra of the highly cured vulcanizates has two origins. The broadening arises from lack of molecular motion in the system and from an increase in chemical shift dispersion due to the new structures formed with crosslinking.

95Mo solid-state NMR spectra of molybdates

1988 ◽  
Vol 148 (5) ◽  
pp. 413-416 ◽  
Author(s):  
V.M. Mastikhin ◽  
O.B. Lapina ◽  
R.I. Maximovskaya
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra

Symmetry-based dipolar recoupling by optimal control: Band-selective experiments for assignment of solid-state NMR spectra of proteins

2009 ◽  
Vol 131 (2) ◽  
pp. 025101 ◽  
Author(s):  
Anders Bodholt Nielsen ◽  
Morten Bjerring ◽  
Jakob Toudahl Nielsen ◽  
Niels Chr. Nielsen
Keyword(s):  
Optimal Control ◽  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Dipolar Recoupling

A solid-state NMR method to determine domain sizes in multi-component polymer formulations

2015 ◽  
Vol 261 ◽  
pp. 43-48 ◽  
Author(s):  
Judith Schlagnitweit ◽  
Mingxue Tang ◽  
Maria Baias ◽  
Sara Richardson ◽  
Staffan Schantz ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Method
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