Spectroscopic Studies on the Radical-Cation Dimer of a Model Compound of Poly(p-phenylenevinylene). Similarities between the Dimer and the State of Positive Polarons in the Sulfuric-Acid-Treated Polymer

1997 ◽  
Vol 101 (10) ◽  
pp. 1726-1732 ◽  
Author(s):  
Akira Sakamoto ◽  
Yukio Furukawa ◽  
Mitsuo Tasumi
Keyword(s):  
Sulfuric Acid ◽  
Radical Cation ◽  
Model Compound ◽  
Spectroscopic Studies ◽  
The State

Infrared spectroscopic studies of the heterogeneous interaction of gas-phase HCl and Cl2 with aqueous sulfuric acid aerosols at 190 K

2002 ◽  
Vol 4 (12) ◽  
pp. 2539-2545
Author(s):  
Karen L. Nash ◽  
Adam E. Heathfield ◽  
David A. Newnham ◽  
Andrew B. Horn
Keyword(s):  
Sulfuric Acid ◽  
Gas Phase ◽  
Spectroscopic Studies ◽  
Aqueous Sulfuric Acid ◽  
Infrared Spectroscopic ◽  
Heterogeneous Interaction ◽  
Sulfuric Acid Aerosols

EPR and Spectroscopic Studies ofS-Methyl-N-salicylidenehydrazinecarbothioatophenanthrolineoxovanadium(IV) as Model Compound for Vanadium Bound to Nitrogen and Sulfur Heteroatoms

2000 ◽  
Vol 14 (1) ◽  
pp. 179-183 ◽  
Author(s):  
Jimmy S. Hwang ◽  
M. O. Hamad Al-Turabi ◽  
Laila El-Sayed ◽  
H. A. M. Al-Gwidi
Keyword(s):  
Model Compound ◽  
Spectroscopic Studies

Mössbauer spectroscopic studies of the state of Pt−Sn/Al2O3 catalyst for hydrocarbon conversion

1982 ◽  
Vol 21 (3) ◽  
pp. 419-422 ◽  
Author(s):  
V. I. Kuznetsov ◽  
E. N. Yurchenko ◽  
A. S. Belyi ◽  
E. V. Zatolokina ◽  
M. A. Smolikov ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
The State ◽  
Hydrocarbon Conversion ◽  
Al2o3 Catalyst

The state of anthraquinone in sulfuric acid (UV and IR spectra)

1967 ◽  
Vol 1 (6) ◽  
pp. 565-568
Author(s):  
V. V. Kozlov ◽  
Yu. A. Kolesnik ◽  
L. A. Kazitsyna
Keyword(s):  
Sulfuric Acid ◽  
Ir Spectra ◽  
The State ◽  
Uv And Ir Spectra

Multifunctional Additives as Zinc-Free Curatives for Sulfur Vulcanization

2006 ◽  
Vol 79 (4) ◽  
pp. 561-588 ◽  
Author(s):  
Geert Heideman ◽  
Jacques W. M. Noordermeer ◽  
Rabin N. Datta ◽  
Ben van Baarle
Keyword(s):  
Physical Properties ◽  
Model Compound ◽  
Vital Role ◽  
The State ◽  
Sulfur Vulcanization ◽  
Multifunctional Additives ◽  
System Inclusion ◽  
The Cost ◽  
Conventional Systems ◽  
Vulcanization Process

Abstract Concern about the release of eco-toxic zinc species from rubbers into the environment leads to an increasing interest in potential substitutes. This investigation reports on the application of Multifunctional Additives, amines complexed with fatty acids, for sulfur vulcanization of rubbers. Good physical properties can be obtained in s-SBR compounds using the MFA/S cure system, albeit at the cost of a shortened scorch time as compared to a ZnO/stearic acid system. Inclusion of ZnO lengthens the scorch time, though it reduces the state of cure and ultimate properties. The amount of ZnO used in the MFA-formulations is considerably lower than in the conventional systems. The introduction of CaO and MgO leads to an improvement in the state of cure and physical properties. Amines play a vital role in the vulcanization process, hence various amine-complexes have been synthesized and investigated as zinc-free curatives in s-SBR compounds. It is observed that the scorch time is related to the basicity of the amines. The results of Model Compound Vulcanization studies with MFAs reveal a fast decomposition of the accelerator and some differences in the distribution of the crosslinked products. The conclusion must be drawn, that the chemistry involved in the MFA-systems is fundamentally different from the conventional vulcanization systems.

Technical Diagnostics of the State of Composite Tanks of the Evaporators of Sulfuric Acid

2016 ◽  
Vol 51 (5) ◽  
pp. 727-733
Author(s):  
O. I. Balyts’kyi ◽  
M. Kawiak ◽  
P. Kawiak
Keyword(s):  
Sulfuric Acid ◽  
The State ◽  
Technical Diagnostics
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