Premium
Comparing Crystallization Kinetics between Polyamide 6 and Polyketone via Chip‐Calorimeter Measurement
Author(s) -
He Yucheng,
Luo Ruiqi,
Li Zhaolei,
Lv Ruihua,
Zhou Dongshan,
Lim Soonho,
Ren Xiaoning,
Gao Hongxu,
Hu Wenbing
Publication year - 2018
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201700385
Subject(s) - crystallization , polyamide , nucleation , materials science , glass transition , entropy of fusion , calorimeter (particle physics) , kinetics , polymer chemistry , differential scanning calorimetry , crystal (programming language) , chemical engineering , enthalpy of fusion , intermolecular force , polymer , thermodynamics , crystallography , chemistry , melting point , composite material , organic chemistry , molecule , programming language , physics , quantum mechanics , detector , computer science , electrical engineering , engineering
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.