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“One‐pot” random terpolymerization of styrene, isoprene and butadiene with Nd‐based catalyst
Author(s) -
Li Tingting,
Hu Yanming,
Zhang Hongxia,
Shi Zhenghai,
He Gongqiang,
Wang Yurong,
Shen Kaihua,
Li Yang
Publication year - 2013
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.39327
Subject(s) - cyclohexane , styrene , isoprene , copolymer , polymer chemistry , gel permeation chromatography , indene , monomer , cyclohexene , methylaluminoxane , toluene , solvent , polymer , molar mass distribution , catalysis , materials science , polybutadiene , chemistry , glass transition , polymerization , organic chemistry , metallocene
Random styrene‐isoprene‐butadiene rubber (SIBR) were achieved with the catalyst system composed of neodymium isopropoxide (Nd(O i Pr) 3 ), methylaluminoxane (MAO) and indene. This catalyst proved to be highly effective in cyclohexane even at low [Al]/[Nd] ratio (ca. 50) to give styrene‐rich terpolymer with high number‐average molecular weight ( M n ) and narrow molecular weight distribution ( M w / M n ). Indene was critical to improve the coordination of styrene. High temperature was beneficial to increase the yield. Aliphatic solvents (hexane and cyclohexane) achieved a higher M n of polymer than toluene as a solvent. The glass transition temperature ( T g ) and composition of SIBR can be controlled by tuning the feed ratio of monomers. All the products have been fully characterized by NMR spectroscopy, gel permeation chromatograph (GPC), and DSC. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1772–1777, 2013
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