State of the‐art for extrudate swell of molten polymers: from fundamental understanding at molecular scale toward optimal die design at final product scale

D Tang, FH Marchesini, L Cardon… - Macromolecular …, 2020 - Wiley Online Library
Polymer extrudate swell is a rheological phenomenon taking place after polymer melt flow
emerges the die exit of extrusion equipment, due to flow redistributions and molecular stress …

Effects of extrudate swell and nozzle geometry on fiber orientation in Fused Filament Fabrication nozzle flow

BP Heller, DE Smith, DA Jack - Additive Manufacturing, 2016 - Elsevier
Abstract The viability of Fused Filament Fabrication (FFF) as an Additive Manufacturing (AM)
method is improved by including discrete carbon fibers in the polymer feedstock. The …

Planar deposition flow modeling of fiber filled composites in large area additive manufacturing

BP Heller, DE Smith, DA Jack - Additive Manufacturing, 2019 - Elsevier
The rapid transition of the Fused Filament Fabrication (FFF) Additive Manufacturing (AM)
process from small scale prototype models to large scale polymer deposition has been …

Superhydrophobic modification of PVDF–SiO 2 electrospun nanofiber membranes for vacuum membrane distillation

ZQ Dong, XH Ma, ZL Xu, ZY Gu - RSC advances, 2015 - pubs.rsc.org
Electrospun nanofiber membranes having a hierarchical structure with multilevel roughness
were generated via electrospinning of poly (vinylidene fluoride)(PVDF)–SiO2 blend …

Die swell of complex polymeric systems

K Wang - Viscoelasticity-From theory to biological applications, 2012 - books.google.com
Die swell is a common phenomenon in polymer extrusion. When a viscoelastic fluid flows
out of a die, the extrudate diameter is usually greater than the channel size. This is called die …

Synthesis and Exfoliation of Calcium Organophosphonates for Tailoring Rheological Properties of Sodium Alginate Solutions: A Path toward Polysaccharide-Based …

K Kopecká, L Vítková, Z Kroneková, L Musilová… - …, 2023 - ACS Publications
Layered nanoparticles with surface charge are explored as rheological modifiers for
extrudable materials, utilizing their ability to induce electrostatic repulsion and create a …

[PDF][PDF] Polymer nanocomposites reinforced with montmorillonite

LA Dobrzański, M Bilewicz… - Archives of Materials …, 2012 - researchgate.net
Purpose: Light microscope with polarized light has been used for observation layered zone,
visible thanks to polarization of the light, inside polymer-polymer composites and …

Testing the PTT rheological model for extrusion of virgin and composite materials in view of enhanced conductivity and mechanical recycling potential

M Edeleva, D Tang, T Van Waeleghem, FH Marchesini… - Processes, 2021 - mdpi.com
One of the challenges for the manufacturing processes of polymeric parts is the dedicated
control of composite melt flow. In the present work, the predictive capability of the Phan …

Extrudate swell ratio characteristics of CaCO3 added linear low density polyethylene

ACY Wong, ACM Wong - Polymer Testing, 2018 - Elsevier
Four CaCO 3 added LLDPE polymer systems were compounded in a 24 mm diameter, co-
rotating, closely intermeshed twin-screw extruder. The compounds differed from each other …

[引用][C] 高分子材料的挤出胀大和熔体破裂

肖建华, 柳和生, 黄兴元 - 高分子材料科学与工程, 2008