Premium
The architecture of hydroxy‐functionalized aPS‐b‐random copolymer‐b‐PE via one‐pot strategy combining living free radical polymerization with coordination polymerization
Author(s) -
Ma Lifu,
Liu Weijiao,
Yi Jianjun,
Wang Hongli,
Huang Qigu,
Gao Kejing,
Yang Wantai
Publication year - 2011
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.33533
Subject(s) - copolymer , polymerization , polymer chemistry , materials science , styrene , living polymerization , monomer , radical polymerization , polymer , composite material
The copolymerization of styrene with ethylene was promoted by CpTiCl 3 /BDGE/Zn/MAO catalyst system combining free radical polymerization with coordination polymerization via sequential monomer addition strategy in one‐pot. The effect of polymerization conditions such as temperature, time, ethylene pressure, and Al/Ti molar ratio on the polymerization performance was investigated. The hydroxy‐functionalized aPS‐b‐random copolymer‐b‐PE triblock copolymer was obtained by solvent extraction and determined by GPC, DSC, WAXD, and 13 C‐NMR. The DSC result indicated that the aPS‐b‐random copolymer‐b‐PE had a T g at 87°C and a T m at 119°C which attributed to the T g of aPS segment and the T m of PE segment, respectively. The microstructure of the hydroxy‐functionalized aPS‐b‐random copolymer‐b‐PE was further confirmed by WAXD, 13 C‐NMR, and 1 H‐NMR analysis; and these results demonstrated that the obtained block copolymer consisted of aPS segment, S ‐E random copolymer segment, and crystalline PE segment. The connection polymerization of the hydroxy‐functionalized aPS with random copolymer‐b‐PE was revealed by GPC results. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011