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Synthesis of 1‐hexene/1,7‐octadiene copolymers using coordination polymerization and postfunctionalization with triethoxysilane
Author(s) -
Kateb Mina,
Karimi Majid,
Nejabat GholamReza,
Mortazavi Seyed Mohammad Mahdi,
Ahmadjo Saeid
Publication year - 2020
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/app.48934
Subject(s) - copolymer , polymer chemistry , triethoxysilane , hexene , materials science , polymerization , diimine , thermal stability , catalysis , polymer , metallocene , diene , chemistry , organic chemistry , natural rubber , composite material
Homo‐ and copolymerization of 1‐hexene (H) and 1,7‐octadiene (O) were done using two different catalysts 1,4‐bis(2,6‐diisopropylphenyl)acenaphthenediiminedibromo nickel (II) and rac ‐ethylenebis(indenyl)zirconium dichloride [ rac ‐Et(Ind) 2 ZrCl 2 ]. The metallocene catalyst showed higher activity than the nickel α ‐diimine catalyst in homo‐ and copolymerization. The 1 H NMR studies confirmed the formation of copolymers containing 8–47% of 1,7‐octadiene. In the copolymerization of hexene and diene, as the amount of incorporated diene in the copolymers increased, their T g increased. TGA results showed that thermal stability of the polymer increases with the increase of 1‐hexene incorporation in the polymer chain. Finally 1‐hexene/1,7‐octadiene copolymers were functionalized by triethoxysilane in the presence of hexachloroplatinic acid. The 1 H NMR spectrum of the functionalized samples showed that the double bonds in the copolymer structure were completely eliminated. The DSC analysis showed higher T g s for the functionalized copolymer. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48934.