Increasing molecular weight parameters of a helical polymer through polymerization in a chiral solvent

Holder, Simon J. and Achilleos, Mariliz and Jones, Richard G. (2006) Increasing molecular weight parameters of a helical polymer through polymerization in a chiral solvent. Journal of the American Chemical Society, 128 (38). pp. 12418-12419. ISSN 0002-7863. (Full text available)

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http://dx.doi.org/10.1021/ja064587e

Abstract

In this communication, we will demonstrate that polymerization in a chiral solvent can affect the molecular weight distribution of the product by perturbing the balance of the P and M helical screw senses of the growing chains. Specifically, for the Wurtz-type synthesis of polymethylphenylsilane (PMPS) in either (R) or (S)-limonene, the weight-average molecular weight of the products (average Mw = 80 000) was twice that of PMPS synthesized in (R/S)-limonene (average Mw = 39 200). Peturbation of the helical segmentation along the polymer chains leads to a reduction in the rate of occurrence of a key termination step. This the first time that a chiral solvent has been demonstrated to have such an effect on a polymerization process in affecting molecular weight parameters in contrast to affecting tacticity.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Simon Holder
Date Deposited: 08 Jun 2011 11:48
Last Modified: 09 May 2014 14:00
Resource URI: http://kar.kent.ac.uk/id/eprint/27883 (The current URI for this page, for reference purposes)

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