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Synthesis of polycarbonate-co-poly(p-ethylphenol) and CdS nanocomposites

✍ Scribed by J. Wang; D. Montville; K. E. Gonsalves

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 489 KB
Volume: 72
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19990628)72:14<1851::aid-app7>3.0.co;2-n

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✦ Synopsis

The enzyme-catalyzed synthesis of poly(p-ethylphenol) (PEP) was modified by copolymerization with polycarbonates through triphosgene at low temperature to form polycarbonate-co-poly(p-ethylphenol) (PC-co-PEP). FTIR, NMR, GPC, and thermal analysis verified the formation of PC-co-PEP. The copolymers have an optical absorption in the UV range. CdS semiconductor nanocrystallites were synthesized in reversed micelles with subsequent in situ enzymatic copolymerization of p-ethylphenol and 4-hydroxythiophenol in the same medium. TEM and ATR-FTIR showed that the polymer precipitated in spherical morphologies, incorporating CdS nanocrystals into the polymer matrix, with surface hydroxyl groups. The polymer/CdS core was then dispersed into polycarbonate. The polymer/CdS nanocomposites showed higher optical aborbance in the UV-vis range when compared to the polymer matrix without CdS.

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