Ravi, P. and Udaya Sankar, K. and Divakar, S. (2000) Beta-Cyclodextrin Mediated Synthesis of Syndiotactic-rich Polystyrene. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 38. pp. 99-112.
![[thumbnail of J._Inclusion_Phenom_38(1-4)_dec_2000.pdf]](http://ir.cftri.res.in/style/images/fileicons/application_pdf.png "J._Inclusion_Phenom_38(1-4)_dec_2000.pdf")
PDF
J._Inclusion_Phenom_38(1-4)_dec_2000.pdf
Restricted to Registered users only
Download (96kB)
Abstract
Stereoregular polystyrene (PS) was prepared using various molar equivalents of -
cyclodextrin ( -CD) by polymerising styrene in the presence of -CD. Stereoregular (isotactic,
atactic and syndiotactic) distributions of the prepared polystyrene polymers were determined from
terminal model Bernoullian statistics using 13C NMR data. Inclusion complexation of styrene by
-cyclodextrin was detected by UV-Visible spectroscopy, which gave a binding constant value of
31606 3350 M−1 for the 1 : 1 complex. With an increase in the styrene : -CD ratios, the proportion
of syndiotactic polymers increased. The glass transition temperature (Tg) of the polymer
also increased along with melting temperature (Tm) at higher styrene : -CD ratios. In addition, the
molecular weight of the polymers prepared decreased with increase in the -CD concentration.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Beta-CD, syndiotactic rich, 13C NMR, crystallanity, stereoregularity |
| Subjects: | 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 27 Polymer Chemistry |
| Divisions: | Fermentation Technology and Bioengineering Food Packaging Technology |
| Depositing User: | Food Sci. & Technol. Information Services |
| Date Deposited: | 01 Jul 2009 04:43 |
| Last Modified: | 30 May 2012 11:00 |
| URI: | http://ir.cftri.res.in/id/eprint/9137 |
Actions (login required)
- View Item