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 language||English (US)|
|Title of host publication||SPE ANTEC 2020|
|Subtitle of host publication||The Annual Technical Conference for Plastic Professionals|
|Publisher||Society of Plastics Engineers|
|Number of pages||3|
|State||Published - 2020|
|Event||SPE ANTEC 2020: Annual Technical Conference for Plastic Professionals - Virtual, Online|
Duration: Mar 30 2020 → May 5 2020
|Name||Annual Technical Conference - ANTEC, Conference Proceedings|
|Conference||SPE ANTEC 2020: Annual Technical Conference for Plastic Professionals|
|Period||3/30/20 → 5/5/20|
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