Controlling the cooling rate experienced by a material during a manufacturing process is a challenge and a major issue. Industrial processing techniques are very diverse and may involve a whole range of cooling rates, which are sometimes extremely high for small and/or thin manufactured parts. For polymers, the cooling rate has consequences on both the microstructure and the time-dependent properties. The common cooling rates associated with conventional calorimetric measurements are generally limited to a few tens of degrees per minute. This work combines several calorimetric techniques (DSC, modulated-temperature DSC, stochastically-modulated DSC and Fast Scanning Calorimetry) to estimate the critical cooling rate required to melt-quench fast-crystallizing polyesters to their fully amorphous state, based on the example of a series of poly(alkylene trans-1,4-cyclohexanedicarboxylate) (PCHs) with a number of methylene groups in the main structure of the repeating unit (Formula presented.) varying from 3 to 6. The even-numbered ones require faster cooling rates (about 3000 K s−1 for (Formula presented.) = 4, between 500 and 1000 K s−1 for (Formula presented.) = 6) compared to the odd-numbered ones (between 50 K min−1 and 100 K s−1 for (Formula presented.) = 3, between 10 and 30 K min−1 for (Formula presented.) = 5).

Hallavant, K., Soccio, M., Guidotti, G., Lotti, N., Esposito, A., Saiter-Fourcin, A. (2024). Critical Cooling Rate of Fast-Crystallizing Polyesters: The Example of Poly(alkylene trans-1,4-cyclohexanedicarboxylate). POLYMERS, 16(19), 1-16 [10.3390/polym16192792].

Critical Cooling Rate of Fast-Crystallizing Polyesters: The Example of Poly(alkylene trans-1,4-cyclohexanedicarboxylate)

Soccio M.;Guidotti G.;Lotti N.;
2024

Abstract

Controlling the cooling rate experienced by a material during a manufacturing process is a challenge and a major issue. Industrial processing techniques are very diverse and may involve a whole range of cooling rates, which are sometimes extremely high for small and/or thin manufactured parts. For polymers, the cooling rate has consequences on both the microstructure and the time-dependent properties. The common cooling rates associated with conventional calorimetric measurements are generally limited to a few tens of degrees per minute. This work combines several calorimetric techniques (DSC, modulated-temperature DSC, stochastically-modulated DSC and Fast Scanning Calorimetry) to estimate the critical cooling rate required to melt-quench fast-crystallizing polyesters to their fully amorphous state, based on the example of a series of poly(alkylene trans-1,4-cyclohexanedicarboxylate) (PCHs) with a number of methylene groups in the main structure of the repeating unit (Formula presented.) varying from 3 to 6. The even-numbered ones require faster cooling rates (about 3000 K s−1 for (Formula presented.) = 4, between 500 and 1000 K s−1 for (Formula presented.) = 6) compared to the odd-numbered ones (between 50 K min−1 and 100 K s−1 for (Formula presented.) = 3, between 10 and 30 K min−1 for (Formula presented.) = 5).
2024
Hallavant, K., Soccio, M., Guidotti, G., Lotti, N., Esposito, A., Saiter-Fourcin, A. (2024). Critical Cooling Rate of Fast-Crystallizing Polyesters: The Example of Poly(alkylene trans-1,4-cyclohexanedicarboxylate). POLYMERS, 16(19), 1-16 [10.3390/polym16192792].
Hallavant, K.; Soccio, M.; Guidotti, G.; Lotti, N.; Esposito, A.; Saiter-Fourcin, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1001969
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