Preparation of graded materials for miscible polycarbonate/poly(methyl methacrylate) blends by segregation under shear flow

Moonprasith, Nantina; Tatsumichi, Mizuki; Nakamura, Kodai; Kida, Takumitsu; Tsubouchi, Kyoko; Hiraoka, Tatsuhiro; Yamaguchi, Masayuki

doi:10.1002/app.53258

Cited by 3 publications

(3 citation statements)

References 47 publications

(83 reference statements)

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“…Recently, gradient thin films have received more interest due to their versatility in a plethora of research fields such as, but not limited to, packaging of flexible electronics, − controlled cell growth in lab-on-a-chip (biosensors), thin-film electrical devices and production of nanopaper . Gradient structures are advantageous because they have been shown to improve the properties of materials, such as electrical, , thermal, adhesive, and mechanical properties. The enhancements of these properties can be realized by fabricating the gradient thin film such that the gradient interface is formed through the thickness − or along the sidewalls − of each coated material.…”

Section: Introductionmentioning

confidence: 99%

“…Gradient structures are advantageous because they have been shown to improve the properties of materials, such as electrical, , thermal, adhesive, and mechanical properties. The enhancements of these properties can be realized by fabricating the gradient thin film such that the gradient interface is formed through the thickness − or along the sidewalls − of each coated material. These structures can be composed of two or more different materials ,,, or by using different concentrations of the same material. ,, Gradient structures are utilized in large and small area applications such as secondary battery, , flexible electronic, , and origami film industries due to the efficiency of the method and the structure itself.…”

Section: Introductionmentioning

confidence: 99%

“… 6 Gradient structures are advantageous because they have been shown to improve the properties of materials, 7 such as electrical, 8 , 9 thermal, 10 adhesive, 11 and mechanical 12 properties. The enhancements of these properties can be realized by fabricating the gradient thin film such that the gradient interface is formed through the thickness 13 − 15 or along the sidewalls 1 − 7 of each coated material. These structures can be composed of two or more different materials 6 , 8 , 10 , 11 or by using different concentrations of the same material.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Scaled Production of Functionally Gradient Thin Films Using Slot Die Coating on a Roll-to-Roll System

Jeong,

Yu,

Harris

2024

ACS Appl. Mater. Interfaces

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Polymer thin films with a cross-web gradient structure is a burgeoning area of research, having received more attention in the last two decades, for improvements in the performance and material properties. Such patterned films have been fabricated using several techniques, but in practice these techniques are non-scalable, material-dependent, wasteful, and not highly efficient. Slot die coating, a well-known scalable manufacturing process, is used to fabricate gradient polymer thin films which will be investigated herein. By incorporating slot die with the custom roll-to-roll imaging system, gradient thin films are successfully fabricated by forcing two fluidic materials into the slot die simultaneously and by manipulating the viscous, diffusive, and inertial forces. The materials will be allowed to intermix, with the aim of having approximately a 50% mix along the centerline of any two contiguous stripes. Moreover, several characterizations such as FTIR, UV−vis spectroscopy, and SEM are performed to assess the quality of the gradient polymer thin films. The gradient structure fabricated using functional and nonfunctional materials has successfully improved the functional properties compared to fully blended two materials. This work will provide an understanding of the mechanisms to obtain gradient polymer thin-film structures that exhibit the desired geometric structure and performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Scaled Production of Functionally Gradient Thin Films Using Slot Die Coating on a Roll-to-Roll System

Jeong,

Yu,

Harris

2024

ACS Appl. Mater. Interfaces

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Compatibilizing and foaming of PC/PMMA composites with nano‐cellular structures in the presence of transesterification catalyst

Zhang,

Huang,

Zheng

et al. 2024

Polymer Engineering & Sci

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Compatibility of polycarbonate (PC) and polymethyl methacrylate (PMMA) alloys was improved by using a transesterification catalyst (SnCl2·2H2O). Modified PC/PMMA alloys exhibit single Tg, and their initial island phase existing in the SEM were transformed into uniform surface. Besides, the transmittance of the modified alloys was increased from original 40% to 85%. Moreover, PC/PMMA alloys and PC foams with micro‐cellular and nano‐cellular structures were prepared by solid‐state CO2 foaming in the presence of transesterification catalyst. Distinctively, there are obvious nano‐cellular structures existing in the PC samples, but no related nanostructures were found in PMMA samples, after treated by same amount of catalyst and foaming process for pure PC and PMMA matrix. Furthermore, the effects of foaming temperature and segment structure on their foaming behavior were also studied. Additionally, a uniaxial stress experiment was conducted at a specific temperature to simulate the biaxial stress during the foaming process for discovering the mechanism of nanopore formation. Therefore, the concept of nano‐cellular structures will point out a direction for the development of high‐performance, heat insulation PC materials of the next generation.Highlights Transesterification catalysts enhanced compatibility between PC and PMMA. Nanopore structures were successfully constructed in PC foams. Segment stretching was the main reason for the formation of nanopores.

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Experimental Studies on the Phase Separation Behavior of Molten Benzenesulfonate-Modified PET/PA6 Blends

Shaojie

et al. 2023

Macromol

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In this work, nylon 6 (PA6) and cationic dyeable polyester (CDP) modified with benzenesulfonate groups were reactively blended in a twin-screw extruder. The well-mixed CDP/PA6 blends were re-molten and statically kept for various amounts of time. The morphology evolution caused by phase separation was observed by a scanning electron microscope (SEM) and an atomic force microscopy-infrared (AFM-IR) technique. In the absence of shear force, the homogeneously mixed blends were found to separate rapidly into two phases because of the poor miscibility between polyester and polyamide. In the early stage, the dispersed phase was small in size and irregular in shape. With prolongation of the phase separation time, the dispersed phase turned into larger and spherical particles to minimize the interface between phases. The phase separation process typically lasted 2 to 7 min. This means that the effects of phase separation on the morphology of the blends cannot be ignored in injection molding, compression molding, or other processing processes short of shear force. The effects of the ratio between polyester and polyamide, the benzenesulfonate content, and the molecular weight of polymers on phase separation behavior were investigated.

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Preparation of graded materials for miscible polycarbonate/poly(methyl methacrylate) blends by segregation under shear flow

Cited by 3 publications

References 47 publications

Scaled Production of Functionally Gradient Thin Films Using Slot Die Coating on a Roll-to-Roll System

Scaled Production of Functionally Gradient Thin Films Using Slot Die Coating on a Roll-to-Roll System

Compatibilizing and foaming of PC/PMMA composites with nano‐cellular structures in the presence of transesterification catalyst

Experimental Studies on the Phase Separation Behavior of Molten Benzenesulfonate-Modified PET/PA6 Blends

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