442. The kinetics of catalytic polymerizations. Part V. The molecular-weight distribution of poly-(α-methylstyrene) prepared by the aluminium chloride-catalyzed polymerization

1952 ◽  
Vol 0 (0) ◽  
pp. 2363-2366 ◽  
Author(s):  
D. O. Jordan ◽  
A. R. Mathieson
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Aluminium Chloride ◽  
Kinetics Of ◽  
Catalyzed Polymerization

The kinetics of the polymerization of sarcosine carbonic anhydride

1949 ◽  
Vol 199 (1059) ◽  
pp. 499-517 ◽  
Keyword(s):  
Molecular Weight ◽  
Equilibrium Constant ◽  
Intrinsic Viscosity ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Intermediate Compound ◽  
Preparative Method ◽  
Kinetics Of

The polymerization of carbonic anhydrides, a reaction important but>u as a preparative method for the synthesis of polypeptides and as an example of a less familiar type of polymerization, has been studied in detail using sarcosine carbonic anhydride (I). The propagation reaction has been shown to involve a reversibly formed compound between the carbonic anhydride and the polymer; this compound decomposes by both a unimolecular and a bimolecular route. The equilibrium constant for the formation of the intermediate compound, and both velocity constants for its decomposition have been determined in two solvents, and the energies of activation and frequency factors calculated. The molecular weight distribution has been calculated; it is extremely sharp. The viscosities of the polymers prepared by this reaction have been measured, and the relation between the intrinsic viscosity and the molecular weight established.

The Dispersion of Carbon Black in Rubber Part IV. The Kinetics of Carbon Black Dispersion in Various Polymers

1994 ◽  
Vol 67 (2) ◽  
pp. 237-251 ◽  
Author(s):  
A. Y. Coran ◽  
F. Ignatz-Hoover ◽  
P. C. Smakula
Keyword(s):  
Molecular Weight ◽  
Carbon Black ◽  
Natural Rubber ◽  
Kinetic Parameters ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Rapid Technique ◽  
Rubber Part ◽  
Kinetics Of ◽  
Carbon Black Dispersion

Abstract A rapid technique for evaluating the rate and state of dispersion of carbon black in natural rubber has been extended to study the dispersion of carbon black in various polymers. The technique measures the extent and rate of dispersion of the black in the rubber. The kinetics of dispersion was characterized for a variety of polymers (e.g. SBR, EPDM, IR, IIR, BR and NR). Kinetic parameters were correlated with molecular weight and molecular weight distribution.

Sign in / Sign up

Export Citation Format

Share Document