CaltechAUTHORS
  A Caltech Library Service

Direct Route to Colloidal UHMWPE by Including LLDPE in Solution during Homogeneous Polymerization of Ethylene

Ronca, S. and Forte, G. and Ailianou, A. and Kornfield, J. A. and Rastogi, S. (2012) Direct Route to Colloidal UHMWPE by Including LLDPE in Solution during Homogeneous Polymerization of Ethylene. ACS Macro Letters, 1 (9). pp. 1116-1120. ISSN 2161-1653. https://resolver.caltech.edu/CaltechAUTHORS:20121030-094207306

[img]
Preview
PDF - Supplemental Material
See Usage Policy.

80Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20121030-094207306

Abstract

The usual aggregation and precipitation driven by crystallization of nascent PE during homogeneous polymerization of ultra-high molecular weight polyethylene (UHMWPE) is inhibited by including linear low-density polyethylene (LLDPE) in the catalyst solution prior to addition of ethylene monomer. Co-crystallization of newly formed PE and dissolved LLDPE creates a polymer brush on the fold surfaces of the nascent crystallites. Consequently, aggregation is inhibited by steric stabilization. Scanning electron microscopy (SEM) images show that individual lamellae (approximately 10–20 nm thick) typically have lateral dimensions of 0.5 μm × 3.5 μm and form “bowtie” shaped stacks that are approximately 200–500 nm thick. This simple method for stabilizing nascent crystals against precipitation is enabling fundamental studies of their metastable “disentangled” state and may open scalable routes to compounding UHMWPE.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/mz300369x DOIUNSPECIFIED
http://pubs.acs.org/doi/abs/10.1021/mz300369xPublisherUNSPECIFIED
ORCID:
AuthorORCID
Ronca, S.0000-0003-3434-6352
Kornfield, J. A.0000-0001-6746-8634
Additional Information: © 2012 American Chemical Society. Received: July 19, 2012. Accepted: August 17, 2012. Published: August 24, 2012. A.A. and J.A.K. acknowledge funding provided by the U.S. National Science Foundation under grant DMR-0710662-Materials World Network.
Funders:
Funding AgencyGrant Number
NSF Materials World NetworkDMR-0710662
Issue or Number:9
Record Number:CaltechAUTHORS:20121030-094207306
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20121030-094207306
Official Citation:Direct Route to Colloidal UHMWPE by Including LLDPE in Solution during Homogeneous Polymerization of Ethylene S. Ronca, G. Forte, A. Ailianou, J. A. Kornfield, and S. Rastogi ACS Macro Letters20121 (9), 1116-1120
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35171
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:30 Oct 2012 19:15
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page