Competition between crystallization and coalescence during the film formation of poly(chloroprene) latex and effects on mechanical properties
journal contributionposted on 2019-07-15, 08:16 authored by Philip G. Richardson, Ignacio Martin-Fabiani, Patrick Shaw, Eman Alsaffar, Emilie Velasquez, Paul Gardner, Peter Shaw, James M. Adams, Joseph L. Keddie
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.
Synthomer (UK) Ltd.
- Aeronautical, Automotive, Chemical and Materials Engineering
Published inIndustrial & Engineering Chemistry Research
Pages21031 - 21043
CitationRICHARDSON, P.G. ... et al, 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.
Publisher© American Chemical Society (ACS)
- AM (Accepted Manuscript)
Publisher statementThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial & Engineering Chemistry Research, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.iecr.9b02279.