Improving thermoforability of iPP through multilayer coextrusion

Larvssa Mever, Alex Jordan, Kyungtae Kim, Bongjoon Lee, Frank S. Bates, Chris Macosko, Ehsan Behzedfar, Olivier Lhost, Shaffiq Jaffer, Yves Trolez, S. A. Total

Research output: Chapter in Book/Report/Conference proceedingConference contribution


While the flow forces governing pnmary melt-based polymer processing techniques, such as extrusion and Injection molding have been extensively studied, characterization of forces in secondary processes such as thermoformmg is limited. In this work we utilize multilayer coextrusion to create an extruded film with 100s of alternating linear low density polyethylene (LLDPE) and isotactic polypropylene (iPP) layers; and by extension, 100s of interfaces The combination of LLDPE, iPP, and these interfaces decreases the elastic storage modulus (E') and broadens the rubbery plateau observed via dynamic mechanical analysis (DMA,). The broadening of the rubber plateau is correlated with an observed improvement in LLDPE/iPP multilayer thermoformabihty compared to the homopolymer LLDPE and iPP films.

Original languageEnglish (US)
Title of host publicationSPE ANTEC 2020
Subtitle of host publicationThe Annual Technical Conference for Plastic Professionals
PublisherSociety of Plastics Engineers
Number of pages3
ISBN (Electronic)9781713821182
StatePublished - 2020
EventSPE ANTEC 2020: Annual Technical Conference for Plastic Professionals - Virtual, Online
Duration: Mar 30 2020May 5 2020

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings


ConferenceSPE ANTEC 2020: Annual Technical Conference for Plastic Professionals
CityVirtual, Online

Bibliographical note

Publisher Copyright:
© 2020 Society of Plastics Engineers. All rights reserved.


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