The Effects On Resilence Using Dithophosphate Cure Systems with Polybutadiene

With requirements for less and less amounts of N-nitrosamine, because of its carcinogen effects, be allowed into rubber products, companies are looking for ways to produce N-nitrosamine free products. One way companies are trying to achieve this is by replacing accelerators such Dithiocarbamates and Thiurams, which produces N-nitrosamine, with dithiophosphate accelerators. Dithiophosphates do not produce N-nitrosamine simply because there is no Nitrogen present. This leads to far less carcinogens in the product.

So the purpose of this paper is to compare different cure systems such as a traditional sulfur cure and a peroxide cure system and see how a dithiophospate one performs. One physical characteristic that will be the main focus is resilience as dithiophosphates tend to create more polysulfide bonds. It is to be expected that these higher number of polysulfide bonds will create more rebound and will be useful in applications that requires deflection of energy. Testing will be done using a Dynamic Mechanical Analysis (DMA).