MOOC - Rubber Technologist - Basic Level
Vulcanization and degradation
This unit will elaborate on various vulcanization systems and degradation mechanisms. A high variety of ingredients influences the degree of vulcanization and the student should be aware and able to apply the systems to optimally develop a rubber product. High performance rubber is often prone to degradation and subsequent loss of in-rubber properties.
Vulcanization methods:
This unit will elaborate on various vulcanization systems, crosslink character and vulcanization curves.
RUBTECHB.U5.E1.PC1
The student knows the peroxide and sulfur vulcanization system mechanisms, their difference in crosslink character and in-rubber properties
RUBTECHB.U5.E1.PC 2
The student knows \"Moving Die Rheometer\" method and is able to name the relevant vulcanization curve characteristics such as scorch time (ts2), vulcanization time (t90) recognize curing phenoma such as marching, plateau and reversing modulus
RUBTECHB.U5.E1.PC 3
The student is able to name typical sulfur crosslinking systems, accompanying sulfur crosslink chainlength character and resulting character of in-rubber properties, such as temperature resistance and dynamic performance
RUBTECHB.U5.E1.PC4
The student has a good understanding of various ingredients involved in the vulcanization process and their functions (activator, accelerator, crosslinker, alkalizers, stearic acid, retarder) and is able to estimate a shift in the vulcanization curve from manipulation of the compound formulation
RUBTECHB.U5.E1.PC5
The student is able to choose a suitable vulcanization system for a given situation in which requirements are easy to recognize