Authors:
Gabriele Milani
1
and
Federico Milani
2
Affiliations:
1
Politecnico di Milano, Italy
;
2
Chem. Co Consultant, Italy
Keyword(s):
Kinetic Numerical Model, EPDM Rubber, Peroxides, Comparison with Experimental Data.
Related
Ontology
Subjects/Areas/Topics:
Application Domains
;
Case Studies
;
Chemical and Petroleum Engineering
;
Computer Simulation Techniques
;
Formal Methods
;
Health Engineering and Technology Applications
;
Laboratory Simulation Software
;
Mathematical Simulation
;
Neural Rehabilitation
;
Neurotechnology, Electronics and Informatics
;
Non-Linear Systems
;
Optimization Issues
;
Simulation and Modeling
;
Simulation Tools and Platforms
Abstract:
In the paper, a simple but effective mathematical model having kinetic base, to predict the vulcanization degree of rubber vulcanized with peroxides, is presented. The approach takes contemporarily into consideration, albeit within a simplified scheme, the actual reactions occurring during peroxidic curing, namely initiation, H-abstraction, combination and addition, and supersedes the simplified approach used in practice, which assumes for peroxidic curing a single first order reaction. After a suitable re-arrangement of the first order system of differential equations obtained from the actual kinetic system adopted, a single second order non-linear differential equation is obtained and numerically solved by means of a Runge-Kutta approach. Kinetic parameters to set are evaluated by means of a standard least squares procedure where target data are represented by experimental values available, i.e. normalized rheometer curves. In order to assess numerical results, a wide experimental
campaign is conducted, varying curing agents, vulcanization temperatures and concentration of the peroxides. Both rheometer curves to compare with those provided by the numerical model and stretch-strain curves of the vulcanized samples are obtained, to have a precise insight into the most suitable parameters to use during curing.
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