Specific interactions in partially miscible polycarbonate (PC)/poly (methyl methacrylate) (PMMA) blends

Mishra, Rachna; Prakash, Rajiv; Maiti, Pralay; Singh, Akhilesh Kumar; Pandey, Dhananjai

doi:10.1016/j.cplett.2009.12.072

Cited by 28 publications

(17 citation statements)

References 31 publications

(77 reference statements)

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“…In general, spectral pattern and number of bands for the PC and PC/GNP/MWCNT composites were more or less similar, apart from their intensity. The peak at 1765-1720 cm 21 represents the stretching band of C@O for the ester group of PC [17]. The asymmetric stretching band for C-O-C and O-C-O of PC is observed at 1290-1180 cm 21 and 645-575cm 21 , respectively.…”

Section: Morphology Of Pc/gnp/mwcnt Compositesmentioning

confidence: 95%

Graphene nanoplate and multiwall carbon nanotube–embedded polycarbonate hybrid composites: High electromagnetic interference shielding with low percolation threshold

Maiti

Khatua

2015

Polymer Composites

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This study has reported the preparation of polycarbonate (PC)/graphene nanoplate (GNP)/multiwall carbon nanotube (MWCNT) hybrid composite by simple melt mixing method of PC with GNP and MWCNT at 330°C above the processing temperature of the PC (processing temperature is 280°C) followed by compression molding. Through optimizing the ratio of (GNP/MWCNT) in the composites, high electromagnetic interference shielding effectiveness (EMI SE) value (∼21.6 dB) was achieved at low (4 wt%) loading of (GNP/MWCNT) and electrical conductivity of ≈6.84 × 10−5 S.cm−1 was achieved at 0.3 wt% (GNP/MWCNT) loading with low percolation threshold (≈0.072 wt%). The high temperature melt mixing of PC with nanofillers lowers the melt viscosity of the PC that has helped for better dispersion of the GNPs and MWCNTs in the PC matrix and plays a key factor for achieving high EMI shielding value and high electrical conductivity with low percolation threshold than ever reported in PC/MWCNT or PC/graphene composites. With this method, the formation of continuous conducting interconnected GNP‐CNT‐GNP or CNT‐GNP‐CNT network structure in the matrix polymer and strong π–π interaction between the electron rich phenyl rings and oxygen atom of PC chain, GNP, and MWCNT could be possible throughout the composites. POLYM. COMPOS., 37:2058–2069, 2016. © 2015 Society of Plastics Engineers

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Section: Morphology Of Pc/gnp/mwcnt Compositesmentioning

confidence: 95%

Graphene nanoplate and multiwall carbon nanotube–embedded polycarbonate hybrid composites: High electromagnetic interference shielding with low percolation threshold

Maiti

Khatua

2015

Polymer Composites

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“…Figure shows the results of the stress versus strain curves for the pure polymers: PMMAe, PC and PMMAh. PMMAh has been used in several studies on PMMA/PC blends developed over the last decades, but the use of a PMMAe leads to different mechanical properties compared to PMMAh. The elongation at break of PMMAe is more than 1000 times greater than that of PMMAh; however, the maximum resistance of PMMAe is 50% lower than that of PMMAh.…”

Section: Resultsmentioning

confidence: 99%

“…PMMA/PC blends using PMMAh have attracted academic interest, with several reports published in the few last decades. Although PMMAh exhibits a fragile mechanical behavior, mixing it with PC leads to polymer blends with good mechanical performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Processing Conditions on the Mechanical and Morphological Properties of Elastomeric Poly (Methyl Methacrylate)/Polycarbonate Blends

Macedo

Reinaldo

Pereira

et al. 2019

Macromolecular Symposia

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The aim of this study was to investigate the influence of the processing conditions in single and co‐rotational twin screw extruders on the mechanical and morphological properties of elastomeric poly (methyl methacrylate)/polycarbonate (PMMAe/PC) blends until the phase inversion. The characterizations were performed by measuring the melt flow index, capillary rheometry, thermogravimetric analysis, tensile tests, Izod impact, and atomic force microscopy (AFM). The thermal and rheological properties showed that PC had a higher sensitivity to processing conditions than PMMAe. The increase in PC concentration altered the mechanical properties of the PMMAe/PC blends with variations according to processing conditions. The morphology of PMMAe/PC blends up to phase inversion was visualized by AFM, and the results showed that the material processed with a single screw extruder obtained similar morphologies to that material processed in twin screw extruder.

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“…This was achieved after growing poly(styrene-co-acrylonitrile) from the particles, a polymer composition known to be miscible with PC in the bulk. Moreover, it is well known that blends of e.g., PMMA and PC or acrylonitrile butadiene styrene (ABS) are miscible [ 48 , 49 ].…”

Section: Adhesion Based On Polymer Brushesmentioning

confidence: 99%

Polymer Brush Coating and Adhesion Technology at Scale

Buhl

Agergaard

Lillethorup³

et al. 2020

Polymers

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Creating strong joints between dissimilar materials for high-performance hybrid products places high demands on modern adhesives. Traditionally, adhesion relies on the compatibility between surfaces, often requiring the use of primers and thick bonding layers to achieve stable joints. The coatings of polymer brushes enable the compatibilization of material surfaces through precise control over surface chemistry, facilitating strong adhesion through a nanometer-thin layer. Here, we give a detailed account of our research on adhesion promoted by polymer brushes along with examples from industrial applications. We discuss two fundamentally different adhesive mechanisms of polymer brushes, namely (1) physical bonding via entanglement and (2) chemical bonding. The former mechanism is demonstrated by e.g., the strong bonding between poly(methyl methacrylate) (PMMA) brush coated stainless steel and bulk PMMA, while the latter is shown by e.g., the improved adhesion between silicone and titanium substrates, functionalized by a hydrosilane-modified poly(hydroxyethyl methacrylate) (PHEMA) brush. This review establishes that the clever design of polymer brushes can facilitate strong bonding between metals and various polymer materials or compatibilize fillers or nanoparticles with otherwise incompatible polymeric matrices. To realize the full potential of polymer brush functionalized materials, we discuss the progress in the synthesis of polymer brushes under ambient and scalable industrial conditions, and present recent developments in atom transfer radical polymerization for the large-scale production of brush-modified materials.

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Specific interactions in partially miscible polycarbonate (PC)/poly (methyl methacrylate) (PMMA) blends

Cited by 28 publications

References 31 publications

Graphene nanoplate and multiwall carbon nanotube–embedded polycarbonate hybrid composites: High electromagnetic interference shielding with low percolation threshold

Graphene nanoplate and multiwall carbon nanotube–embedded polycarbonate hybrid composites: High electromagnetic interference shielding with low percolation threshold

Effect of Processing Conditions on the Mechanical and Morphological Properties of Elastomeric Poly (Methyl Methacrylate)/Polycarbonate Blends

Polymer Brush Coating and Adhesion Technology at Scale

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