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Polycarbonate

About: Polycarbonate is a research topic. Over the lifetime, 14032 publications have been published within this topic receiving 141740 citations. The topic is also known as: PC & Polycarbonate, PC.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the preparation of heterogeneous cation exchange membranes by solution-casting techniques using S-polyvinylchloride (S-PVC) and polycarbonate (PC) as binders, Cation exchange resin powder as functional groups agent, and tetrahydrofuran as solvent.
Abstract: This research deals with the preparation of heterogeneous cation exchange membranes by solution-casting techniques using S-polyvinylchloride (S-PVC) and polycarbonate (PC) as binders, cation exchange resin powder as functional groups agent, and tetrahydrofuran as solvent. The effects of polymer binder type and resin ratio loading on morphological, electrochemical, and mechanical properties of prepared membranes were studied and evaluated. Scanning electron microscopy and scanning optical microscopy were used for the membranes structure investigation. Images showed that increase of resin loading in casting solution resulted in a highly uniform phase forming. Moreover resin particles were distributed more uniformly in polycarbonate membranes compared to the polyvinylchloride ones. The water content, surface hydrophilicity, ion exchange capacity, ion concentration, permselectivity, membrane potential, surface charge density, transport number, ionic permeability, flux of ions, and current efficiency were enha...

34 citations

Journal ArticleDOI
09 Mar 2015-Polymer
TL;DR: In this paper, a polycarbonate (PC) and multi-walled carbon nanotubes (MWCNTs) functionalized with hydroxyl groups were melt mixed in a twin extruder to produce PC composites containing PC-grafted MWCNTs.

34 citations

Patent
13 Mar 2006
TL;DR: In this article, the authors provided a polycarbonate resin composition comprising 100 parts by weight of an aromatic poly-carbonate resin having a terminal hydroxyl group concentration in the range of 100 to 1800 ppm and 0.0001 to 5 parts of fine particles of boride of at least one metal.
Abstract: This invention provides a polycarbonate resin composition comprising 100 parts by weight of an aromatic polycarbonate resin having a terminal hydroxyl group concentration in the range of 100 to 1800 ppm and 0.0001 to 5 parts by weight of fine particles of boride of at least one metal selected from the group consisting of La, Ce, Pr, Nd, Tb, Dy, Ho, Y, Sm, Eu, Er, Tm, Yb, Lu, Sr and Ca. A hot radiation shielding molded product produced by molding the polycarbonate resin composition is also provided. In particular, the polycarbonate resin composition and hot radiation shielding molded product have low haze, excellent transparency, low solar radiation transmittance, satisfactory hot radiation shielding properties (particularly the function of permitting the transmission of visible light and selectively shielding infrared light), and excellent mechanical strength and heat stability on melting and thus are suitable for use, for example, in window glass for general buildings or vehicles, roof materials for arcades, carports and the like, optical materials such as infrared cut filters, and agricultural films.

34 citations

Journal ArticleDOI
TL;DR: In this article, the effect of compatibilizer on the morphological, thermal, rheological, and mechanical properties of polypropylene/polycarbonate (PP/PC) blends was investigated.
Abstract: This work deals with the effect of compatibilizer on the morphological, thermal, rheological, and mechanical properties of polypropylene/polycarbonate (PP/ PC) blends. The blends, containing between 0 to 30 vol % of polycarbonate and a compatibilizer, were prepared by means of a twin-screw extruder. The compatibilizer was produced by grafting glycidyl methacrylate (GMA) onto polypropylene in the molten state. Blend morphologies were controlled by adding PP-g-GMA as compatibilizer during melt processing, thus changing dispersion and interfacial adhesion of the polycarbonate phase. With PP-g-GMA, volume fractions increased from 2.5 to 20, and much finer dispersions of discrete polycarbonate phase with average domain sizes decreased from 35 to 3 mu m were obtained. The WAXD spectra showed that the crystal structure of neat PP was different from that in blends. The DSC results suggested that the degree of crystallization of PP in blends decreased as PC content and compatibilizer increased. The mechanical properties significantly changed after addition of PP-g-GMA. (C) 1997 John Wiley & Sons, Inc.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the mesogenic unit of polycarbonates has been investigated and it was found that the liquid crystalline properties of poly-carbonates strongly rely on the mesogene unit applied.
Abstract: Three series of thermotropic liquid crystalline polycarbonates and poly(ester-carbonate)s were prepared by solution polycondensation of 4,4′-biphenyldiol (BP), 4′-hydroxybiphenyl-4-hydroxybenzoate (HHB), or 4-hydroxyphenyl-4″-hydroxybiphenyl-4′-carboxylate (HHBP), as mesogenic unit, with 1,10-bis(p-hydroxybiphenoxy)decane (N10), bisphenol A (BPA), 4,4′-dihydroxy-diphenyl ether (BPO), 4,4′-[phenylbis(oxy)]bisphenol (BPOO), methylhydroquinone (MeHQ), or phenylhydroquinone (PhHQ). One series of cholesteric poly(ester-carbonate)s were also prepared by using HHBP, the aromatic diols mentioned above and isosorbide as the chiral moiety. All polycondensations were implemented in pyridine by using triphosgene as the condensation agent. The synthesized polycarbonates were characterized by viscometer, FTIR, DSC, TGA measurements, polarizing microscopy equipped with a heating stage, and WAXD powder pattern. In this study, it was found that the liquid crystalline properties of polycarbonates strongly rely on the mesogenic unit applied. HHBP-series exhibits a wide temperature region of liquid crystalline (LC) phase even with 50% of bisphenol A (BPA), which is a V-shaped structure and usually destroys liquid crystalline properties. In addition, homopolycarbonate with HHBP structure possesses extraordinarily low phase-transition temperature and wide liquid crystalline phase range, due to its asymmetric structure. This asymmetric structure results in head-to-tail, head-to-head, and tail-to-tail random conformation of polymer chain. The isosorbide containing poly(ester-carbonate)s formed cholesteric phase, which showed homogeneous blue, green, or red Grandjean texture upon shearing in molten state and the Grandjean texture could be frozen easily while quenching the sample to the room temperature. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 1852–1860, 2000

34 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023248
2022471
2021184
2020294
2019390
2018403