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Lamellar crystal thickness transition of melt‐crystallized isotactic polybutene‐1 observed by small‐angle X‐ray scattering
Author(s) -
Yamashita Motoi,
Kato Minoru
Publication year - 2007
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889807011570
Subject(s) - polybutene , supercooling , materials science , lamellar structure , crystallization , tacticity , crystallography , small angle x ray scattering , scattering , radius of gyration , crystal (programming language) , radius , condensed matter physics , optics , thermodynamics , chemistry , composite material , polymer , physics , computer security , computer science , polymerization , programming language
The first‐order long period L 1 , the second‐order long period L 2 and lamellar crystal thickness l c of isotactic polybutene‐1 have been investigated for crystallization in the melt over a wide range (313.2 to 363.2 K) of crystallization temperatures by small‐angle X‐ray scattering experiments and density measurements. The long period L 1 shows a single linear dependence on inverse supercooling. The crystal thickness l c , however, demonstrates two linear dependences on inverse supercooling and a transition from one dependence to the other has been observed around 338.2 K, where l c becomes comparable with the radius of gyration R g of the samples.