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Competition between Crystallization and Coalescence during the Film Formation of Poly(Chloroprene) Latex and Effects on Mechanical Properties

Richardson, Philip, Martín-Fabiani, Ignacio, Shaw, Patrick, Alsaffar, Eman, Velasquez, Emilie, Gardner, Paul, Shaw, Peter, Adams, James Michael and Keddie, Joseph L. (2019) Competition between Crystallization and Coalescence during the Film Formation of Poly(Chloroprene) Latex and Effects on Mechanical Properties Industrial & Engineering Chemistry Research, 58 (46). pp. 21031-21043.

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Abstract

Poly(chloroprene) is a synthetic crystallizable polymer used in several applications, including rubber gloves. The film formation of poly(chloroprene) latex offers opportunities to define structures at length scales between the molecular and macroscopic, thereby adjusting the elastomer’s mechanical properties. However, the connections between processing and the resultant film properties are not fully understood. Here, we investigate the competition between the coalescence of latex particles to build cohesive strength and their crystallization to raise the elastic modulus. We demonstrate that when coalescence precedes crystallization, the elastomer has greater extensibility and a higher tensile strength compared to when crystallization occurs during coalescence. The mechanical properties of poly(chloroprene) were tuned by blending two colloids with differing gel contents and crystallizabilities. Heating above poly(chloroprene)’s melting temperature allows increased particle interdiffusion and builds cohesion, prior to recrystallization. We provide evidence from in situ wide-angle X-ray scattering for the strain-induced crystallization of as-cast films from particle blends.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Richardson, Philipp.richardson@surrey.ac.uk
Martín-Fabiani, Ignacio
Shaw, Patrick
Alsaffar, Eman
Velasquez, Emilie
Gardner, Paul
Shaw, Peter
Adams, James MichaelJ.Adams@surrey.ac.uk
Keddie, Joseph L.J.Keddie@surrey.ac.uk
Date : 20 November 2019
DOI : 10.1021/acs.iecr.9b02279
Copyright Disclaimer : Copyright © 2019 American Chemical Society
Depositing User : Clive Harris
Date Deposited : 17 Jul 2019 07:19
Last Modified : 09 Jul 2020 02:08
URI: http://epubs.surrey.ac.uk/id/eprint/852263

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