A New Method of Determination of Fillers in Vulcanized Rubber

1940 ◽  
Vol 13 (4) ◽  
pp. 931-935
Author(s):  
R. A. Hublin
Keyword(s):  
Filler Content ◽  
New Method ◽  
Vulcanized Rubber ◽  
Method Of Determination ◽  
Classic Method ◽  
Solution Methods

Abstract A new reagent, o-nitroanisol, makes it possible to determine the total filler content of vulcanized rubber much more rapidly and more precisely than heretofore. In addition, the procedure is easier than that of the classic method. It would therefore be desirable if the method of determining fillers by solution of the rubber, which can now be carried out so easily, were to be used in many cases in place of incineration methods, which, in spite of being rapid, are very inaccurate, and also if the new method were to be used in place of the ordinary, relatively inconvenient solution methods.

New Method for Determining the Filler Content of Vulcanized Rubber

1946 ◽  
Vol 19 (2) ◽  
pp. 482-485
Author(s):  
R. A. Hublin
Keyword(s):  
Solution Method ◽  
Filler Content ◽  
Considerable Extent ◽  
New Method ◽  
Vulcanized Rubber ◽  
Solution Methods ◽  
Conventional Solution

Abstract The new reagent, o-nitroanisol makes it possible to shorten to a considerable extent the determination of the total filler content of vulcanized rubber, and to increase the precision of the determination. In addition, the procedure is carried out more easily than are the older classic procedures. It would seem desirable, therefore, to use this more convenient solution method of determining filler content in many cases in place of calcination methods, which, though rapid, are very inaccurate, and in place of the conventional solution methods, which are so inconvenient.

New method of determination of limit plastic load in intersecting cylindrical shells

2012 ◽  
Vol 48 (1-2) ◽  
pp. 15-21
Author(s):  
V. N. Skopinskii ◽  
N. A. Berkov ◽  
A. D. Emelyanova
Keyword(s):  
Cylindrical Shells ◽  
New Method ◽  
Method Of Determination

A New Method of Determination of the Coefficients of Emission in Nucleation Theory

2005 ◽  
pp. 39-73 ◽  
Author(s):  
Jürn W. P. Schmelzer ◽  
Vitali V. Slezov ◽  
Alexander S. Abyzov
Keyword(s):  
New Method ◽  
Nucleation Theory ◽  
Method Of Determination

scholarly journals Flare Stars in Evolved Clusters

1980 ◽  
Vol 85 ◽  
pp. 249-250
Author(s):  
E. S. Parsamian
Keyword(s):  
Usual Method ◽  
Flare Star ◽  
New Method ◽  
Method Of Determination ◽  
Flare Stars ◽  
Young Clusters

A new method of determination of the ages of aggregates based on flare star observations is proposed. The method is specially useful in the case of young clusters and associations, for which the usual method involving their H-R diagrams encounters difficulties. The method can be used also for particular flare stars.

Determination of the Water Absorption of Crude Rubber and of Vulcanized Rubber

1940 ◽  
Vol 13 (2) ◽  
pp. 400-407
Author(s):  
J. W. van Dalfsen
Keyword(s):  
Special Reference ◽  
Water Absorption ◽  
Vulcanized Rubber ◽  
Method Of Determination ◽  
Determination Methods

Abstract In the introduction the purpose of the investigation is described which is the development of a method suitable for the determination of the water absorption of crude and vulcanized rubber, and which, in conjunction with ash and nitrogen determinations is especially adapted to the testing of purified rubber. The conditions which affect the results of water determinations are reviewed, with special reference to the formulas of Taylor and Kemp, which make it possible, within certain limits, to compare results obtained by different determination methods. The reasons for selecting the foregoing method of determination of water absorption are described. It is pointed out that water absorption depends to different degrees on the time of vulcanization. In the rubber-sulfur mixture which was chosen, the influence of the degree of vulcanization is small, so that it is sufficient to vulcanize all types of rubber for the same length of time. At the same time it is shown that the results obtained by immersion of rubber for 7 and 25 hours at 80° C. still sufficiently agree with the values computed from the formulas of Taylor and Kemp. A method of measuring water absorption is described in detail. The question arises to what extent rubber manufacturers may use this method, in conjunction with ash and nitrogen determinations, method for estimating the quality of purified rubber. Rubber manufacturers are urged to give their opinion of this proposed method. Some other method will be considered if it should appear that manufacturers prefer this other method.

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