期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 219, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201700385
关键词
crystallization; DSC; polyamides; polyketone
资金
- National Natural Science Foundation of China [21474050]
- Key Lab of National Defense Science and Technology of China [61426030107]
- Program for Changjiang Scholars and Innovative Research Team in University
- Project of Suzhou SDK New Materials Company
Polyamide 6 and aliphatic polyketone exhibit similar melting points and heats of fusion, which expose the kinetic effects of intermolecular interactions on their crystallization kinetics. The commercial chip-calorimeter Flash DSC1 is employed to measure their crystallization rates in a broad temperature range. The results show that polyamide crystallizes faster than polyketone at high temperatures, but slower at low temperatures. The faster crystallization is attributed to a lower lateral-surface free energy for crystal nucleation at high temperatures on account of the sheet-like hydrogen bonding in polyamide crystals. The slower crystallization is attributed to the lower molecular mobility for crystal nucleation at low temperatures on account of the higher glass transition temperature of polyamide.
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