Crosslink density of the vulcanisates
was determined by swelling in toluene- at room
temperature for 7 days. Before weighing the swollen
specimens, filter paper was used to remove excessive
solvent on the specimen surfaces. Percentage swelling at
equilibrium (Q) was calculated by Equation (1).
where W1 and W2 are the initial weight and the swollen
weight of the test specimen, respectively.