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Instead of predeterminated values a and (, we choose these values randomly.
above their fusion temperature, held there for 1 min, then rapidly cooled by liquid nitrogen to the predeterminated crystallization temperature [T.
As far as the Avrami exponent n is concerned, for both copolymers it turned out to be close to 3 for all the crystallization temperatures investigated (see Table 2), indicating that the crystallization process originates from predeterminated nuclei and is characterized by three-dimensional spherulitic growth.
In order to erase the previous thermal history, the copolymer samples were heated up to a temperature 30[degrees]C higher than their respective melting temperatures, held there for 3 min, then rapidly cooled by liquid nitrogen to the predeterminated crystallization temperature [T.