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Preferential orientation of crystallites spatially confined in lamellar microdomains of polyethylene‐ block ‐[atactic poly(propylene)]
Author(s) -
Sakurai Kazuo,
Shinkai Seiji,
Ueda Masaya,
Sakurai Shinichi,
Nomura Shunji,
MacKnight Willam J.,
Lohse David J.
Publication year - 2000
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20001101)21:16<1140::aid-marc1140>3.0.co;2-p
Subject(s) - small angle x ray scattering , lamellar structure , materials science , lamella (surface anatomy) , lipid microdomain , crystallite , polyethylene , crystallization , transmission electron microscopy , volume fraction , polymer chemistry , scattering , chemical engineering , composite material , crystallography , optics , chemistry , nanotechnology , membrane , biochemistry , physics , engineering , metallurgy
Synchrotron small angle X‐ray scattering (SAXS), wide angle X‐ray scattering (WAXS), and transmission electron microscopy were carried out for an oriented polyethylene‐ block ‐[atactic poly(propylene)] with a molecular weight of 1.13×10 5 and a volume fraction of polyethylene of 0.5. Isothermal crystallization at 93°C did not destroy the pre‐formed microdomain, however, with a higher crystallization temperature, the microdomain was more heavily deformed and more crystalline lamella grew. In WAXS profiles, preferential orientation of (020) reflection peak was observed, indicating that the crystalline lamella grew in parallel with the micro domain interface.