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Preparation and characterization of end‐alkoxysilylated polystrene and the grafting behaviors onto inorganic pigments. I. Utilization of 4‐isopropoxydimethylsilyl‐α‐methylstyrene
Author(s) -
Ohata Masatoshi,
Yamamoto Masaharu,
Isono Yoshinobu
Publication year - 1995
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.1995.070550316
Subject(s) - grafting , polystyrene , polymer , polymer chemistry , adsorption , hydrolysis , toluene , molar mass distribution , catalysis , chemistry , chemical engineering , end group , materials science , organic chemistry , copolymer , engineering
Novel end‐functional polystyrene having isopropoxydimethylsilyl (IPS) groups at the end part of the chain was prepared. IPS groups were introduced by the reaction between the living polystyryl anion and 4‐isopropoxydimethylsilyl‐α‐methylstyrene ( 1 ) in THF at 195 K. The resultant polymer was characterized by GPC, 1 H‐NMR, and TLC. It was confirmed that the polymer had several units of 1 at the chain end and a fairly narrow molecular weight distribution. IPS groups in the polymer can be hydrolyzed with strong acid such as mono‐ n ‐butylphosphate (MBP) but not with weak acid and base. Grafting behaviors of the polymer onto silica and alumina were studied in toluene in the presence of MBP as a catalyst. The polymer was grafted onto silica effectively. However, it cannot be grafted onto alumina because of predominant adsorption of MBP onto alumina having a basic surface. © 1995 John Wiley & Sons, Inc.