Publication

Solid state orientation of thermoplastic vulcanizates

Innes, James R.
; ; ; 
Allan, Steve
; ; 
Wang, X.
; ; 
Whiteside, Ben
; ; 
Caton-Rose, Philip D.
... show 3 more
Publication Date
2022-10
End of Embargo
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Keywords
Die drawing, Recycling, Solid phase deformation, Thermoplastic vulcanizates
Rights
© 2022 The Authors. Macromolecular Materials and Engineering published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
2022-07-31
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Engineering and Digital Technology Publications
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Benkreira_et_al_2022.pdf
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Additional title
Abstract
Die drawing has been used to produce polymeric products with superior mechanical properties by orientation of polymer chains. Although this process has been studied for a variety of thermoplastics and composites, there are no current publications exploring its efficacy to enhance thermoplastic vulcanizates (TPVs). TPVs combine the elasticity and high elongation at break of thermosets while maintaining the processability of a thermoplastic. For the first time, TPVs are die drawn and the effect upon their mechanical and thermal properties is investigated. TPVs based upon ethylene propylene diene monomer (EPDM) and polypropylene (PP) as well as ground tyre rubber (GTR) and PP are prepared by dynamic vulcanization using a twin-screw extruder. In all cases, die drawing leads to an increase in tensile strength and modulus of the material along the drawing direction, often at the cost of elongation at break. At a draw ratio of 2, EPDM/PP TPVs exceed the strength and modulus of neat polypropylene whilst maintaining an elongation at break in excess of 200%. For EPDM/PP, tensile strength increases from ≈21 MPa to over 90 MPa using a draw ratio of 4, whilst for GTR/PP this increases from ≈15 to ≈57 MPa.
URI
https://bradscholars.brad.ac.uk/handle/10454/20290
Version
Published version
Citation
Innes JR, Shriky B, Spencer P et al (2022) Solid state orientation of thermoplastic vulcanizates. Macro-molecular Materials and Engineering. 307(10): 2200279.
Link to publisher’s version
Link to published version
Link to Version of Record
https://doi.org/10.1002/mame.202200279
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Article
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