The University of Southampton
University of Southampton Institutional Repository

The effect of dibenzylidene sorbitol on the crystallization behaviour of polyethylene

Vaughan, A.S. and Hosier, I.L. (2008) The effect of dibenzylidene sorbitol on the crystallization behaviour of polyethylene Journal of Materials Science, 48, (8), pp. 2922-2928.

Record type: Article

Abstract

The influence of dibenzylidene sorbitol (DBS) on the optical clarity, crystallization behaviour and morphology of polyethylene has been studied by UV/visible spectroscopy, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). By combining crystal growth rates with Avrami parameters derived from DSC crystallization exotherms, nucleation densities were determined as a function of crystallization temperature. In the blend without DBS, the nucleation density decreased progressively with increasing crystallization temperature whereas, in the system containing DBS, the nucleating efficiency was found to remain constant and then decrease dramatically above 120 degrees C. Throughout the crystallization range studied, the DBS increased the nucleation density substantially, often to a value comparable with that seen in a commercial sorbitol-clarified propylene/ethylene copolymer system. SEM revealed a change from a continuous lamellar texture at low temperatures to one based upon isolated sheaf-like objects at 124 degrees C. At high crystallization temperatures, both the DSC and the SEM also provided evidence of a significant rejected linear fraction, which appeared to decorate the sorbitol network on quenching. Possible explanations for these effects are discussed.

PDF 2008_DBS.pdf - Other
Restricted to Registered users only
Download (733kB)

More information

Published date: April 2008
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 265716
URI: http://eprints.soton.ac.uk/id/eprint/265716
ISSN: 0022-2461
PURE UUID: c46a1a2f-bc16-4a6a-8435-62f604d2650c
ORCID for I.L. Hosier: ORCID iD orcid.org/0000-0003-4365-9385

Catalogue record

Date deposited: 15 May 2008 09:36
Last modified: 18 Jul 2017 07:24

Export record

Contributors

Author: A.S. Vaughan
Author: I.L. Hosier ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×