Characterization on Propylene Oxide Polymerization with In Situ FT-IR

Abstract:

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In-situ FT-IR technique is used to investigate the polymerization of propylene oxide with potassium t-butoxide as initiator. The epoxy absorbance at 828 cm-1 is the most useful peaks to monitor the reaction. The absorbance of C-O-C stretching vibration at 1107 cm-1 is very strong and also very useful. Yet, the absorbance of C-H stretching vibration in 3000~2800 cm-1 region is very weak and not reliable for In-situ FT-IR analysis. By monitoring the consumption of propylene oxide, the polymerization rate constant k at 33°C was calculated out and an interesting auto acceleration phenomenon was discovered. Moreover, the chain-transfer process was analyzed by measuring the formation of C=C double bonds, which clarified a former confusion about the course of propylene oxide rearrangement.

Info:

Periodical:

Advanced Materials Research (Volumes 160-162)

Edited by:

Guojun Zhang and Jessica Xu

Pages:

60-64

DOI:

10.4028/www.scientific.net/AMR.160-162.60

Citation:

P. F. Yang et al., "Characterization on Propylene Oxide Polymerization with In Situ FT-IR", Advanced Materials Research, Vols. 160-162, pp. 60-64, 2011

Online since:

November 2010

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Price:

$35.00

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