Time-Resolved Kinetics of Organometallic Reactions in the Gas Phase by Transient Infrared Absorption Spectrometry

1989 ◽  
pp. 227-244 ◽  
Author(s):  
Bruce H. Weiller ◽  
Edward R. Grant
Keyword(s):  
Gas Phase ◽  
Infrared Absorption ◽  
Absorption Spectrometry ◽  
Time Resolved ◽  
Organometallic Reactions ◽  
Kinetics Of ◽  
Infrared Absorption Spectrometry

An Infrared Spectrometric Study of the Oxidation of Natural Rubber

1952 ◽  
Vol 25 (2) ◽  
pp. 251-257
Author(s):  
L. D'Or ◽  
I. Kössler
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Infrared Absorption ◽  
Atmospheric Oxygen ◽  
Absorption Spectrometry ◽  
Oxidation Products ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Kinetics Of ◽  
Infrared Absorption Spectrometry

Abstract The kinetics of the oxidation of natural rubber by atmospheric oxygen has been studied by various methods, for example, by volumetric and manometric measurements of the absorption of oxygen, by measurements of the increase of weight of the rubber, and by changes in the mechanical properties as a function of time. However, the oxidation of rubber is a complex phenomenon, and none of these techniques offers a means of following the oxidation in detail. In principle, it is possible, by infrared absorption spectrometry, to detect the presence of different groups which are present in a given sample of rubber and to determine their concentrations. Hence, it was hoped that this technique would offer a means of studying the various phenomena involved in the oxidation of rubber. In fact, this technique has already been employed in studies of the structure of rubber as well as in the qualitative and quantitative analysis of synthetic products. In addition to these already published studies, various authors have reported that the oxidation of natural rubber results in changes in its infrared spectrum, but none of the investigators has followed these changes quantitatively. Nevertheless, the possible interest of such a quantitative study, when carried out in parallel with a study of the changes in mechanical properties, has been pointed out by different authors. The authors of the present work decided, as a first approach to the problem, to prepare samples of rubber which could be studied by infrared absorption. The progress of oxidation could then be followed quantitatively by the disappearance of the principal groups present in rubber which had not undergone oxidation and the formation of characteristic groups in the oxidation products. Finally, from the data obtained, it was hoped, if not to draw conclusions as to the mechanism or mechanisms of oxidation, at least to obtain some indications of the precise kinetics of this oxidation.

Direct Time-Resolved Study of the Kinetics of the Reaction of Silylene with Phenylsilane in the Gas Phase. Does SiH2React with the Aromatic Ring?

2009 ◽  
Vol 28 (21) ◽  
pp. 6339-6346 ◽  
Author(s):  
Rosa Becerra ◽  
J. Pat Cannady ◽  
Robin Walsh
Keyword(s):  
Gas Phase ◽  
Aromatic Ring ◽  
Time Resolved ◽  
Kinetics Of
Sign in / Sign up

Export Citation Format

Share Document