Abstract
AbstractIn this article, we study the evolution of networks based on nitrile butadiene rubber (NBR) which is reinforced by in situ zinc dimethacrylate (ZDMA) during curing. The crosslink density of the composites cured for different time was evaluated by equilibrium swelling experiments. The curing process was analyzed by using a UR‐2030 Rotorless Rheometer. Mechanical properties of the composites cured for different time were also used to evaluate the evolution of the networks. The results reveal that the covalent crosslinked network of NBR is formed rapidly in the early curing stage while the ionic crosslinks grow gradually during the whole curing process. The ionic crosslinks affect much more on the mechanical properties and make the composite easier to achieve inextensibility limit of the network. A sketch for formation of the NBR/ZDMA network was proposed in the last part of this article. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers
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