Synthesis and properties of styrene–butadiene–oxyethylene multiblock polymers

✍ Scribed by Hong-Quan Xie; Xu-Quan Tao; Jun-Shi Guo

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Volume: 61
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960718)61:3<407::aid-app2>3.0.co;2-m

✦ Synopsis

Multiblock copolymers of styrene, butadiene, and ethylene oxide were synthesized by coupling together telechelic dihydroxyl polystyrene, telechelic dihydroxyl polybutadiene, and poly(ethy1ene glycol), using 2,4-toluene diisocyanate as coupling agent. The copolymers were purified by extractions and characterized by infrared (IR), 'H nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), transmission electron microscopy (TEM), membrane osmometry, and dynamic viscoelastometry. The multiblock copolymers are amphiphilic, exhibiting very good emulsifying properties. They possess a good phase transfer catalytic ability in Williamson reaction, and their LiC104 complexes exhibit a conductivity above 1 X lop4 S/cm at 35°C.