Polymer crystallization, nucleation lamellae characteristics

Spherulite and lamella characteristics vary from polymer to polymer. Many semicrystalline polymers have an optimum crystalhzation temperature. Above the optimum crystallization temperature, the nucleation rate slows, limiting crystallization below the optimum crystallization temperature, viscosity increases, which also limits crystallization. The rate of crystallization is affected by several methods, such as adding a nucleating agent to increase crystallization. Quickquenching polymers such as PET produce amorphous PET, as noted earlier. To calculate the crystalhzation rate for a given polymer as a function of temperature [10],... 

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