Topic
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.
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Patent•
30 Dec 1999TL;DR: In this paper, a multi-plied laminate, containing a photochromic thermoplastic polyurethane (herein “TPU”) and a polycarbonate resin, is first placed in the cavity of a suitable mold.
Abstract: A process for making a photochromic optical lens is disclosed In a first embodiment of the process a multi-plied laminate, containing a ply of photochromic thermoplastic polyurethane (herein “TPU”) and a ply containing thermoplastic polycarbonate, is first placed in the cavity of a suitable mold The ply that contains polycarbonate resin is placed facing the cavity Thermoplastic polycarbonate resin is then injected into the cavity In a second embodiment, referred to as an over-mold method, polycarbonate is first injection molded into a molding cavity to form a substrate Photochromic TPU is, in a subsequent step, injected into the cavity to form a superstrate overlay In both embodiments, the articles thus molded are suitable for the preparation of optical lenses
34 citations
TL;DR: In this article, chemical modification of MWCNT enhances the compatibility as well as miscibility between polycarbonate and liquid crystalline polymer (LCP) in the concerned composites and improves the thermal, mechanical dynamic mechanical and electrical properties of the composites.
Abstract: Polycarbonate (PC)/liquid crystalline polymer (LCP)/Multiwall carbon nanotube (MWNTs) nanocomposites containing as-received and modified (COOH-MWNT) carbon nanotubes were prepared through melt process in extruder and then compression molded. The chemical modification of MWCNT enhances the compatibility as well as miscibility between Polycarbonate and LCP in the concerned composites. Incorporation of functionalized MWCNTs improves the thermal, mechanical dynamic mechanical and electrical properties of the composites. Storage modulus and glass transition temperature increases in a remarkable fashion due to the enhanced interfacial adhesion between the PC/LCP/COOH-MWCNT. Field emission microscopy (FESEM) and HRTEM exhibit LCP fibrillation and fine dispersion of COOH-MWCNT throughout the matrix highlighting the miscibility between LCP and PC matrix.
34 citations
TL;DR: In this article, the effects of the weld parameters on the weld morphology are considered in detail, and it is shown that part of the bond strength in such dissimilar materials results from mechanical interlocking of the two polymers, which is caused by viscous mixing.
Abstract: Under the right conditions, high strengths are shown to be achievable in vibration welded polycarbonate to polyetherimide Joints. While welding of thermoplastic interfaces of the same material can be understood in terms of interchain diffusion at elevated temperatures, this mechanism is severely limited in the case of dissimilar materials. Scanning electron microscopy is used to show that part of the bond strength in such dissimilar materials results from mechanical interlocking of the two polymers, which is caused by viscous mixing. The effects of the weld parameters on the weld morphology are considered in detail.
34 citations
TL;DR: In contrast to some thermoplastics, in which weld strengths equal to those of the base resins can be achieved, tests on two grades of acrylonitrile-butadiene-styrene resin (ABS) showed weld strengths on the order of 90-95% of the strength of ABS, with slightly higher values being obtained at lower rubber levels as discussed by the authors.
34 citations
Patent•
05 Jan 2011
TL;DR: In this paper, a method of preparation of polycarbonate/polyester alloy is presented, which is a technology of simultaneously using organic/inorganic rigid particle toughener is adopted; the glycidyl methacrylate grafted ethylene-octylene multipolymer, organic modified needle-shaped aedelforsite, poly carbonate and polyester are melted and mixed in a double-screw extruder, to obtain high performance alloy material.
Abstract: The invention discloses a preparation method of polycarbonate/polyester alloy. Glycidyl methacrylate grafted ethylene-octylene multipolymer/organic modified needle-shaped aedelforsite composite toughener, i.e. a technology of simultaneously using organic/inorganic rigid particle toughener is adopted; the glycidyl methacrylate grafted ethylene-octylene multipolymer, organic modified needle-shaped aedelforsite, polycarbonate and polyester are melted and mixed in a double-screw extruder, to obtain high-performance alloy material. The prepared polycarbonate/polyester alloy has excellent integrated mechanical properties and size stability, the notched impact strength reaches 1200J/m, the tensile strength reaches 67MPa, the elongation at break reaches 250 percent, the flexural strength is up to98MPa, the flexural modulus reaches 2750MPa, and the thermal deformation temperature in high load (1.82MPa) is up to 105 DEG C. Therefore, the prepared polycarbonate/polyester alloy can be applied incars, and to outer decorations, household electrical appliances, IT and the like industrial products.
34 citations