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On the crystallization Kinetics in Natural Rubber

In this article, we introduce a framework to investigate the growth of nano-crystallites in a polymer matrix numerically. This framework combines the Flory theory of entropic elasticity with phase-field approaches commonly used to model crystal growth. We investigate in particular the growth kinetics of a crystallite in the presence of topological constraints such as entanglements or cross-links, and show that depending on the coupling between the topological constraints and the growth kinetics various structures can be observed: branched structures looking like spherulites or stable nano-crystallites as observed in strain-induced crystallization.