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Macromolecular synthesis using mesoporous zeolites
Author(s) -
Kageyama Keisuke,
Ng Shau Mien,
Ichikawa Hiroyuki,
Aida Takuzo
Publication year - 2000
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 - 10.1002/1521-3900(200007)157:1<137::aid-masy137>3.0.co;2-u
Subject(s) - methylaluminoxane , polymerization , polymer chemistry , mesoporous material , materials science , polyester , molar mass distribution , aluminosilicate , living anionic polymerization , polyethylene , radical polymerization , polymer , chemistry , chemical engineering , organic chemistry , catalysis , metallocene , composite material , engineering
Mesoporous zeolites such as MCM‐41 were found to serve as nano‐flasks for free radical polymerization of methyl methacrylate (MMA), where the formation of long‐lived propagating radicals was observed. Al‐MCM‐41 with a Lewis‐acidic aluminosilicate framework catalyzed living ring‐opening polymerization of cyclic esters such as δ ‐valerolactone and ϵ ‐caprolactone, to give narrow molecular‐weight‐distribution polyesters. With Ti‐MCM‐41, a titanate‐containing mesoporous silica, ring‐opening polymerization of δ ‐valerolactone also took place to give a high molecular‐weight polyester. On the other hand, with Ti‐MCM‐41 in the presence of methylaluminoxane (MAO), ethylene was polymerized to give a high molecular‐weight, linear polyethylene.