Investigation on Non-Isothermal Crystallization Kinetics of Polyethylene Terephthalate-Polyethylene Naphthalate Blends.

As the PEN content increases, the n 1 value shows a decreasing trend: PEN-0.9% has n 1 = 2.511–3.207, and PEN-9% has n 1 = 1.771–2.495, indicating that the spatial hindrance of rigid naphthalene rings limits the spatial dimension of crystal growth, leading to a transition in growth mode towards two-dimensional lamellar crystals.

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