This course will start in 2A and will continue in 2B. The lectures will take place only each 2nd week.|
Additionally, one week of lab work in small groups is included. To give sufficient time to deal individually with this lab work, this course is spread over 2 quartiles.
General course aim: Define performance criteria for rubber (as part of the broader polymer technology) articles and translate these into the design and production of compounds and articles with the specific visco-elastic or rubber-elastic material behavior of elastomers.
Explain / describe in general terms, the development of rubber compounds for different application requirements, to include:
- A global overview of the rubber industry, its history and present status, including main applications: tires, hoses, profiles, seals, vibration dampers, etc.
- Theoretical description of cooperative contribution of individual polymer molecules, crosslinked into a rubber network, on macroscopic material properties: polymer models for rubber-elasticity, Neo-Hookean and Mooney-Rivlin theories.
- The main rubber polymer types being used with respect to their different performance vis-à-vis the main application requirements.
- A detailed understanding of the filler technology, comparison of carbon black and silica / silane filled rubber compounds plus new alternative fillers and their performance in rubber
- The importance and effect of reinforcement including silica / silane coupling: the nanoscopic phenomena (described e.g. by the Payne effect) which influences the finalmacroscopic properties
- A basic understanding of mixing theory, as applied in second instance to rubber mixing: two-roll mills, internal batch mixers, latest development trends in mixing technology (e.g. tandem mixer)
- A basic understanding of subsequent processing techniques to include: extrusion, calandering, moulding and vulcanisation
- The main ways to crosslink (vulcanize) rubbers.
- Main techniques for (macroscopic) performance testing of rubber articles.
- Finite Element Method (FEM) to simulate mixing behavior and rubber performance
- Fibre reinforcement: interaction between elastic material and fibres
- Recycling of tires: possibilities to re-use worn tires
Elastomer or Rubber Technology represents a sub-group of the wider field of polymer technology. It covers about 15% of the total polymer turnover. Polymer-technology originated from rubber-technology, but rubbers have kept their own identity because of their unique combination of resilience and form stability after extremely large deformations, commonly designated as "rubber-elasticity".
Elastomeric articles always are there to perform a function, wherein the rubber-elastic properties are the key factor: e.g. a car-tire translates all car-drivers interventions into the car-road contact: accelerating, breaking, cornering, etc. In this functional performance, the design of the article, the composition of the elastomeric material - commonly prepared for the purpose and called "compounding" - and the manufacturing technique all come together and jointly determine the end-result. In this course the structural characteristics and properties of elastomers and reinforcing fillers are covered, as well as the basic principles of compounding, processing and vulcanization, all illustrated with representative examples of rubber applications. The course includes a 5 days laboratory training into rubber compounding, vulcanization and characterization of mechanical properties, mainly to illustrate and visualize the main processing and performance tests in use in the rubber world, as they are different from thermoplastic polymers.
Two assignments will be given. The first assignment contains a written group report and an oral exam (presentation and discussion) based on the lab work (in a group of 2-3 persons). The second assignment contains a written report and an oral exam (presentation and discussion) covering a practical application example (in a group of 2 persons). Both assignments count 50% for the final grade.
|For students within the Faculty ET it is recommended to join first:|
- Module 6 Productontwerpen
- PEE course
(but not obligatory)
The following courses are already recommended for Modul 6:
Materials Science 1 (202000110)
- Materials Science 2 (202000116)
- Processing and Properties of Polymers (202000132)
For students from other faculties this is decided on a case-by-case basis.
Recommended: For students within the Faculty ET:
Academic Research Skills (202000237)
|Master Mechanical Engineering|
|Master Industrial Design Engineering|
|Master Biomedical Engineering||Verplicht materiaal|
|B. Rodgers (ed.): Rubber Compounding; Marcel Dekker Inc., New York, Basel|
|"Elastomeric Technology" 115650, nr. 799|
|2 assignments (orals exam + written repo|
OpmerkingExamination: For each of the two assignments: written report and oral exam (presentation and dicsussion)