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A new insight into multi-tier structure tailoring: Synchronous utilization of particle migration and incompatible interface separation under shear flow
- Source :
- Polymer. 194:122384
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- In this work, polyethylene (PE)/silica microsphere composite melt is used to penetrate the ethylene-α-octene block copolymer (OBC) melt in multi-melt multi-injection molding (M3IM) process. Due to the viscosity difference between PE/silica composite melt and OBC melt, a disturbed flow interface of these two melts formed. Thanks to the “shear-induced migration” theory in suspended balance model (SB model) and the unique flow field in M3IM, silica microspheres can be designed to migrate from high shear rate layer to low shear rate layer in PE/silica core melt, further to intaglio micro-pits on the interface of PE/silica core and OBC skin melt. As a result, the migrated silica microspheres can be intuitively observed by peeling off the OBC layer, as well as a “lotus seedpod”-like structure consisting of quantity-adjustable asperities and micro-pits can be constructed on the peeled surface of OBC layer. This work sheds lights to rapidly fabricate multi-tier structures by polymer melt processing strategies, aiming to manufacture functional devices on a large scale.
- Subjects :
- Materials science
Polymers and Plastics
Organic Chemistry
Composite number
Core (manufacturing)
02 engineering and technology
Molding (process)
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Shear rate
Viscosity
Materials Chemistry
Particle
Composite material
0210 nano-technology
Shear flow
Layer (electronics)
Subjects
Details
- ISSN :
- 00323861
- Volume :
- 194
- Database :
- OpenAIRE
- Journal :
- Polymer
- Accession number :
- edsair.doi...........d3541c0acc9ad9eaed591e14a126df8a