Synthesis of comb‐like dispersants and a study on the effect of dispersant architecture and carbon black dispersion

2019 ◽  
Vol 57 (15) ◽  
pp. 1682-1696 ◽  
Author(s):  
Travis P. Holbrook ◽  
Georgeta M. Masson ◽  
Robson F. Storey
Keyword(s):  
Carbon Black ◽  
Carbon Black Dispersion

States of Carbon Black Dispersion and Extensibility of Rubbers

1993 ◽  
Vol 66 (2) ◽  
pp. 317-328 ◽  
Author(s):  
Asahiro Ahagon
Keyword(s):  
Carbon Black ◽  
Tensile Property ◽  
Crosslink Density ◽  
Hydrodynamic Effect ◽  
Property Variation ◽  
Agglomerate Size ◽  
Filled Rubber ◽  
Two Temperatures ◽  
Confined Polymer ◽  
Carbon Black Dispersion

Abstract Analysis is made for the origin of the mixing-induced tensile property variation of a filled rubber. Attention is paid to the hydrodynamic effect f(ϕe) of the filler, defined here as the factor to adjust the deviation of 100% modulus from the theory of rubber elasticity. For the rubbers mixed under variety of conditions, the f(ϕe)'s are calculated from the observed values of the modulus, at 25°C and 100°C, and the crosslink density. The variation of the f(ϕe) is considered to be governed by the mobility of the polymer confined in agglomerates of the filler. The mobility variation due to mixing seems to be mainly influenced by agglomerate size at 25°C, and by agglomerate size and chemical constraints at 100°C. Therefore, the f(ϕe)'s at the two temperatures are suggested to be useful measures of the state of carbon-black micro-dispersion. The extensibility of the rubbers is closely related f(ϕe). This indicates that the failure property is also governed by the mobility of the confined polymer.

Reflectometry—A New Method of Measuring Filler Dispersion

1998 ◽  
Vol 71 (1) ◽  
pp. 17-25 ◽  
Author(s):  
M. Gerspacher ◽  
L. Nikiel ◽  
H. H. Yang ◽  
C. P. O'Farrell
Keyword(s):  
Carbon Black ◽  
Sample Preparation ◽  
New Method ◽  
Standard Equipment ◽  
Rubber Sample ◽  
Filler Dispersion ◽  
Sample Measurement ◽  
Carbon Black Dispersion

Abstract A new method of measuring carbon black dispersion in rubber is presented. This method is based on the measurement of the light reflectivity from the rubber sample using standard equipment used in the evaluation of the tint strength of carbon black (ASTM D3265 procedure). This method can be applied for both uncured and cured samples; however, the uncured sample measurement has significant advantages in the simplicity of the sample preparation and obtaining important filler dispersion information of the compound. It is shown that samples with better dispersed carbon black reflect less light as compared to samples with poor carbon black dispersion.

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