Experimental study on viscosity properties of cyclic olefin copolymer (COC) flowing through micro capillary dies

Lu, Jin; Qiang, Yuanbao; Wu, Wangqing; Jiang, Bingyan

doi:10.1016/j.polymertesting.2020.106635

Cited by 12 publications

(15 citation statements)

References 33 publications

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“…Lu et al. [ 112 ] studied the viscosity property of COC flowing through injection molding at different temperatures (240, 260, and 280 °C) and die diameters (100, 200, and 500 µm). Overall, the results showed that the viscosity of molten COC can be reduced by increasing the temperature.…”

Section: Fabrication Methodsmentioning

confidence: 99%

“…It was found that molten COC compressibility has a significant effect on impression pressure and density distribution, and these effects become more evident as the part thickness decreases below 620 μm. Lu et al [112] studied the viscosity property of COC flowing through injection molding at different temperatures (240, 260, and 280 °C) and die diameters (100, 200, and 500 μm). Overall, the results showed that the viscosity of molten COC can be reduced by increasing the temperature.…”

Section: Injection Moldingmentioning

confidence: 99%

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A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

Agha

Waheed

Alamoodi

et al. 2022

Macro Materials & Eng

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Cyclic olefin copolymers (COC) are amorphous, transparent thermoplastics composed of cyclic olefin monomers (norbornene) and linear olefins (ethene). They are increasingly utilized as fabrication materials for microsystems and microfluidic devices, owing to their promising features of low water absorption, high electrical insulation, long-term stability of surface treatments, and resistance to a broad variety of acids and solvents. Many manufacturing processes for COC-based devices have been developed in recent decades. These methodologies are categorized as replication methods or fast prototyping as common in fabrication of thermoplastic microfluidic devices. This review gives a full discussion of the features of COCs, the various production processes, and the numerous selected applications in microfluidic platforms. The review also explores COC's composition and fundamental features, as well as fabrication processes and applications in a variety of fields, investigates the material's potential advantages and uses, and attempts to create a comprehensive list of COC's possible benefits. Due to their unique features and simplicity of fabrication, COCs are projected to advance the future of microfluidics, microsystems, and optofluidics.

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Section: Fabrication Methodsmentioning

confidence: 99%

Section: Injection Moldingmentioning

confidence: 99%

A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

Agha

Waheed

Alamoodi

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…Differing from one-dimensional axial flow in conventional extrusion process ( Lu et al, 2020 ), helical stress filed is generated in rotation extrusion through the controlled rotation of the die and the mandrel, which realizes the multi-dimensional controllable flow of the melt and improves the functionality of the material ( Li Y. et al, 2019 ). Figure 1A shows the schematic illustration of the rotation extrusion rheometer ( Li et al, 2021a ).…”

Section: Rotation Extrusion Technologymentioning

confidence: 99%

Current Advances and Future Perspectives of Advanced Polymer Processing for Bone and Tissue Engineering: Morphological Control and Applications

Zhang

Nie

2022

Front. Bioeng. Biotechnol.

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Advanced polymer processing has received extensive attention due to its unique control of complex force fields and customizability, and has been widely applied in various fields, especially in preparation of functional devices for bioengineering and biotechnology. This review aims to provide an overview of various advanced polymer processing techniques including rotation extrusion, electrospinning, micro injection molding, 3D printing and their recent progresses in the field of cell proliferation, bone repair, and artificial blood vessels. This review dose not only attempts to provide a comprehensive understanding of advanced polymer processing, but also aims to guide for design and fabrication of next-generation device for biomedical engineering.

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“…A study back in 2011 reported the micro-injection moulding of a lab-on-a-chip device with micropillar features in COC, and yet those pillars were shallow with an aspect ratio of 1 or much lower (Oh et al 2011). COC micropillars with an aspect ratio higher than 1 have been prepared using hot embossing (Geissler et al 2020;Kourmpetis et al 2019), and there have been studies on the viscosity of COC at high temperatures to help understand the filling of COC during injection moulding (Lu et al 2020). However, no comparative studies of micropillar array fabrication in PMMA and COC using injection moulding have been reported.…”

Section: Introductionmentioning

confidence: 99%

Injection moulding of micropillar arrays: a comparison of poly(methyl methacrylate) and cyclic olefin copolymer

et al. 2022

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Injection moulding of micropillar arrays offers a fast and inexpensive method for manufacturing sensors, optics, lab-on-a-chip devices, and medical devices. Material choice is important for both the function of the device and manufacturing optimisation. Here, a comparative study of poly(methyl methacrylate) (PMMA) and cyclic olefin copolymer (COC) injection moulding of micropillar arrays is presented. These two polymers are chosen for their convenient physical, chemical, and optical properties, which are favoured for microfluidic devices. COC is shown to replicate the mould’s nano/microstructures more precisely than PMMA. COC successfully forms a micropillar array (250 mm diameter; 496 mm high) and closely replicates surfaces with nano-scale roughness (30–120 nm). In the same moulds, PMMA forms lens arrays (not true pillars) and smoother surfaces due to the incomplete filling for all parameters studied. Thus, COC offers finer structural detail for devices that require micro and nano-structured features, and may be more suited to injection moulding microfluidic devices.

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Experimental study on viscosity properties of cyclic olefin copolymer (COC) flowing through micro capillary dies

Cited by 12 publications

References 33 publications

A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

Current Advances and Future Perspectives of Advanced Polymer Processing for Bone and Tissue Engineering: Morphological Control and Applications

Injection moulding of micropillar arrays: a comparison of poly(methyl methacrylate) and cyclic olefin copolymer

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