MICROWAVE ABSORPTION AND MOLECULAR STRUCTURE IN LIQUIDS. XLIX. A METHOD OF ANALYZING SIMULTANEOUS RELAXATION PROCESSES AND ITS APPLICATION TO 2-NAPHTHOL AND 2-NAPHTHALENETHIOL1,2

1963 ◽  
Vol 67 (2) ◽  
pp. 226-229 ◽  
Author(s):  
Francis K. Fong ◽  
Charles P. Smyth
Keyword(s):  
Molecular Structure ◽  
Microwave Absorption ◽  
Relaxation Processes

Microwave Absorption and Molecular Structure in Liquids. VII. Effects of Viscosity and Dipole—Dipole Forces1

1952 ◽  
Vol 74 (3) ◽  
pp. 644-648 ◽  
Author(s):  
A. J. Curtis ◽  
P. L. McGeer ◽  
G. B. Rathmann ◽  
C. P. Smyth
Keyword(s):  
Molecular Structure ◽  
Microwave Absorption

Relaxation Processes in Vulcanized Rubber. II. Secondary Relaxation Due to Network Breakdown

1963 ◽  
Vol 36 (2) ◽  
pp. 389-398 ◽  
Author(s):  
A. N. Gent
Keyword(s):  
Molecular Structure ◽  
Experimental Study ◽  
Natural Rubber ◽  
Relaxation Process ◽  
Relaxation Processes ◽  
Secondary Relaxation ◽  
Oxidative Deterioration ◽  
Vulcanized Rubber ◽  
Oxidation Inhibitors ◽  
Natural Rubber Vulcanizates

Abstract An experimental study is described of a “secondary” relaxation process in stretched vulcanizates, which becomes dominant after long periods at normal temperatures. It is shown to be affected markedly by the temperature, the atmosphere in which the test is conducted, and the presence of oxidation inhibitors. It is therefore attributed to oxidative deterioration of the molecular structure. In some vulcanizates, however, a similar or even greater relaxation is found to occur in vacuo, and this is attributed to the failure of specific crosslink structures. The extent of recovery on releasing the extended testpieces has also been investigated for a number of natural rubber vulcanizates.

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