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Raman Structural Study of Copolymers of Propylene with Ethylene and High Olefins
Author(s) -
Chernyshov Konstantin,
Gen Dmitry,
Shemouratov Yuri,
Prokhorov Kirill,
Nikolaeva Gulnara,
Sagitova Elena,
Pashinin Pavel,
Kovalchuk Anton,
Klyamkina Alla,
Nedorezova Polina,
Shklyaruk Boris,
Optov Valery
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201051067
Subject(s) - comonomer , copolymer , polypropylene , raman spectroscopy , materials science , ethylene , tacticity , polymer chemistry , pentene , phase (matter) , chemistry , organic chemistry , composite material , polymerization , polymer , optics , catalysis , physics
Nascent form of random copolymers of propylene with ethylene, 1‐butene, 1‐hexene, 1‐octene, and 4‐methyl‐1‐pentene was studied by Raman spectroscopy. The most significant spectral alterations with a change in propylene content were observed in two lines at 809 and 841 cm −1 . The first line corresponds to vibrations of polypropylene helical chains in the crystalline phase, while the second one is associated with vibrations of polypropylene helical chains having isomeric defects. Raman data confirm that conformational composition and phase state of copolymer macromolecules strongly depend on the comonomer content as well as on the size of the comonomer units.