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Activity of samarocene catalysts adsorbed on mesoporous silicates for the polymerization of methyl methacrylate
Author(s) -
Yasuda Hajime,
Nakayama Yuushou,
Satoh Yoshinori,
Shen Zhiquan,
Ni Xufeng,
Inoue Miyoshi,
Namba Seitaro
Publication year - 2004
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1522
Subject(s) - silanol , polymerization , mesoporous material , adsorption , catalysis , methyl methacrylate , materials science , chemical engineering , silicate , polymer chemistry , tacticity , chemistry , polymer , organic chemistry , composite material , engineering
A samarocene complex, (C 5 Me 5 ) 2 SmMe(thf), was adsorbed on a series of mesoporous silicates of various pore sizes. Pre‐treatment of the latter with AlMe 3 before adding the complex was effective in deactivating the surface silanol functionalities. The silicates having relatively larger pore size tended to adsorb a larger amount of the complex. The polymerization of methyl methacrylate (MMA) by the complex adsorbed on the silicates with large pore sizes (>29 Å) quantitatively afforded highly syndiotactic poly(MMA)s with higher molecular weights compared with those obtained by the corresponding homogeneous system. Similar catalyst systems of smaller pore size were much less active. Copyright © 2004 Society of Chemical Industry