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Crystallization and melting behavior of amorphous poly(iminosebacoyl iminodecamethylene)
Author(s) -
Tan Susheng,
Su Aihua,
Yang Xiaoniu,
Zhou Enle
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000801)77:5<993::aid-app6>3.0.co;2-5
Subject(s) - lamellar structure , differential scanning calorimetry , materials science , recrystallization (geology) , lamella (surface anatomy) , crystallization , annealing (glass) , amorphous solid , polymer , crystallography , isothermal process , crystallinity , crystal (programming language) , population , polymer chemistry , chemical engineering , composite material , thermodynamics , chemistry , paleontology , programming language , physics , biology , computer science , engineering , demography , sociology
Multiple melting behavior was observed in the differential scanning calorimetry (DSC) scans for the isothermally crystallized poly(iminosebacoyl iminodecamethylene) (PA1010) samples. Coexistence of crystal populations with different lamellar thickness in PA1010 was discussed by means of DSC, wide‐angle X‐ray diffraction (WAXD), and small‐angle X‐ray scattering techniques. During crystallization of the polymer, a major lamellar crystal population developed first, which possessed a higher melting temperature. However, a small fraction of the polymer formed minor crystal population with thinner lamellae, which was metastable and, upon post‐annealing, could grow into more stable and thicker lamellae through melting and recrystallization process. Lamellae insertion or stacks would develop during the post‐annealing at a lower temperature for the isothermally crystallized samples; thus, multiple crystal populations with different thickness could be produced. It is the multiple distribution of lamella thickness that gives rise to multiple melting behavior of crystalline polymers. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 993–1002, 2000