Study of cure process of thick solid rubber

Effects of filler contents and processing parameters on the weldline strength of compression molded natural rubber

“…The decrease of t 90 for CaCO 3 and CB systems is thought to be caused by the alkalinity of CaCO 3 as well as the surface treatment of commercial grade CaCO 3 with zinc oxide, which acts as an activator for the vulcanization reaction [16]. Furthermore, the increased thermal conductivity of rubber compounds by the addition of CB [17–19] and the reactive organic groups (such as phenolic, hydroxyl, quinone, carboxyl) and reactive hydrogen bonds, as well as free radicals on the surface of CB, can also react chemically with the rubber molecules [13, 16], which has the potential to promote the kinetics of the crosslinking reaction. This phenomenon was also identified by previous studies [20–25].…”

A Prediction Model for Rubber Curing Process

“…Two types of curing systems were examined. One is the styrene butadiene rubber with sulfur/CBS system (Nozu et al, 2008). The other is the blend of styrene butadiene rubber and natural rubber with peroxide system (Baba et al, 2008).…”

“…However, few fundamental studies with relatively large rubber size have been done to develop a computer simulation technique. Nozu et al (2008), Tsuji et al (2008) and Baba et al (2008) have conducted experimental and theoretical studies on the curing process of rubbers with relatibely large size. Rubbers tested were styrene butadiene rubbers with different sulphur concentration, and a blend of styrene butadiene rubber and natural rubber.…”

Combined Effects of Hot Curing Conditions and Reaction Heat on Rubber Vulcanization Efficiency and Vulcanizate Uniformity

“…One of the important procedures in the numerical analysis of the rubber vulcanization process is calculation of the temperature field; many researchers have devoted their time to studying this topic 15–20. However, an important phenomenon is that rubber vulcanization is an exothermic reaction and therefore, in order to obtain high vulcanization efficiency and good vulcanizate uniformity, the combined effects of hot curing conditions and reaction heat on the temperature field should be investigated.…”

“…However, an important phenomenon is that rubber vulcanization is an exothermic reaction and therefore, in order to obtain high vulcanization efficiency and good vulcanizate uniformity, the combined effects of hot curing conditions and reaction heat on the temperature field should be investigated. Though there exist many papers in which reaction heat has been considered,5, 15–19 few researchers have presented integrated computational methods and theoretical simulation procedures.…”