Diblock copolymers, each with two stat-copoly(oxyethylene/oxypropylene) blocks, were prepared by sequential anionic copolymerization in the presence of a crown ether, and characterized by gel permeation chromatography and NMR spectroscopy. Aqueous solutions of the copolymers were investigated by sta
Preparation of soluble copolyurethaneimide containing oxyethylene and oxypropylene units
✍ Scribed by In-Chul Kim; Jong-Ho Kim; Kew-Ho Lee; Tae-Moon Tak
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 134 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0021-8995
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📜 SIMILAR VOLUMES
Diblock-copoly(oxypropylene/oxyethylene)s with moderately-long P-blocks (about 200 P units) and narrow block-length distributions were prepared by use of 18-crown-6 ether and the potassium salt of methoxypropanol in the sequential anionic polymerization of bulk propylene oxide at room temperature an
A multiblock copoly(ester-ether) consisting of poly(L-lactic acid) (PLLA) and poly(oxypropylene-co-oxyethylene) (PN) was prepared and characterized. Preparation was done via the solution polycondensation of a thermal oligocondensate of L-lactic acid, a commercially available telechelic polyether (PN
## Abstract **Summary:** A class of new, soluble, __π__‐conjugated polymers containing a fumaronitrile unit in the main chain were synthesized by the reaction between di(4‐bromophenyl)fumaronitrile and bis(2,2‐dimethylpropane‐1,3‐diyl)‐1,4‐dialkoxyphenylene‐2,5‐diborate employing palladium catalyst