Premium
Styrene–butadiene block copolymer with high cis ‐1,4 microstructure
Author(s) -
Zhu Han,
Wu YiXian,
Zhao JiangWei,
Guo QingLei,
Huang Qigu,
Wu GuanYing
Publication year - 2007
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.26528
Subject(s) - copolymer , polybutadiene , styrene , polystyrene , materials science , styrene butadiene , polymer chemistry , microstructure , fourier transform infrared spectroscopy , elastomer , chemical engineering , polymer , composite material , engineering
The sequential block copolymerization of styrene (St) and butadiene (Bd) was carried out with an activated rare earth catalyst composed of catalyst neodymium tricarboxylate (Nd), cocatalyst Al(i‐Bu) 3 (Al), and chlorinating agent (Cl). The microstructure, composition, and morphology of the copolymer were characterized by FTIR, 1 H NMR, 13 C NMR, and TEM. The results show that styrene–butadiene diblock copolymer with high cis ‐1,4 microstructure of butadiene units (∼ 97 mol %) was synthesized. The cis ‐selectivity for Bd units was almost independent on the content of styrene units in the copolymer ranging from 18.1 mol % to 29.8 mol %. The phase‐separated morphology of polystyrene (PS) domains of about 40 nm tethered by the elastomeric polybutadiene (PB) segments is observed. The PS‐ b ‐ cis ‐PB copolymer could be used as an effective compatilizer for noncompatilized binary PS/ cis ‐PB blends. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom