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•
19 Mar 1990
TL;DR: An aromatic polycarbonate composition contains polycarbonates in which a ratio of the phenolic end group to the non-phenolic end groups is at least 1/19 as mentioned in this paper, and a copolymer having epoxy or oxazolinyl group.
Abstract: An aromatic polycarbonate composition contains aromatic polycarbonate in which a ratio of the phenolic end group to the non-phenolic end group is at least 1/19, and a copolymer having epoxy or oxazolinyl group, aromatic vinyl-diene-vinyl cyanide copolymer or aromatic polyester, or glass filler Compatibility between the specific aromatic polycarbonate and the other resin, weld strength, melt stability or adhesion to glass filler are improved
54 citations
Patent•
13 Apr 1999
TL;DR: In this article, a flame retardant polycarbonate resin composition and housings of the composition for electric and electronic instruments and appliances are provided, which can be well molded into thin-wall moldings with good appearance.
Abstract: Provided are a flame retardant polycarbonate resin composition and housings of the composition for electric and electronic instruments and appliances. Having good fluidity and good moldability, the composition can be well molded into thin-wall moldings with good appearance. The composition contains additive components of a fibrous filler, a terpene resin, a composite rubber-based graft copolymer, a halogen-free phosphate compound and a polytetrafluoroethylene.
53 citations
Patent•
15 Dec 2005TL;DR: An optically clear thermoplastic resin composition consisting essentially of: structural units derived at least one substituted or unsubstituted polycarbonate, at least greater than 30 weight percent of a substituted or unsaturated polyester, a modified poly carbonate, an impact modifier having a refractive index in the range between 1.51 and about 1.56 and an additive is disclosed.
Abstract: An optically clear thermoplastic resin composition consisting essentially of: structural units derived at least one substituted or unsubstituted polycarbonate, at least greater than 30 weight percent of a substituted or unsubstituted polyester, a modified polycarbonate, an impact modifier having a refractive index in the range between about 1.51 and about 1.56 and an additive is disclosed. The composition possess good optical properties, flow, stability and mechanical property. Also disclosed is a process to prepare these compositions and articles therefrom.
53 citations
TL;DR: The method prevents both static and dynamic wetting of PC by aqueous solutions including viscous, non-Newtonian solutions of polymers as e.g. alginate.
Abstract: We propose a simple and effective scheme for the modification of the walls of microfluidic channels fabricated in polycarbonate (PC) after the device has been bonded. The method prevents both static and dynamic wetting of PC by aqueous solutions including viscous, non-Newtonian solutions of polymers as e.g.alginate. The procedure uses dodecylamine, which readily reacts with the carbonate groups of PC to produce a hydrophobic surface. We characterize the dependence of the contact angles and homogeneity of the modified surfaces on the time, temperature, and concentration—all important parameters—of the reaction and provide optimal conditions for the process.
53 citations
TL;DR: The gas transport properties of bisphenol A polycarbonate films were examined as a function of the cooling rate during film processing and subsequent physical aging in this paper, where a one-dimensional lattice model was developed to help probe the effects of the distribution of energy barriers associated with polymer motion on the transport properties.
Abstract: The gas transport properties of bisphenol A polycarbonate films were examined as a function of the cooling rate during film processing and subsequent physical aging. Interpretation of the permeation properties using results from dynamic mechanical analysis and density measurements indicated that the diffusion coefficient of small gas molecules in glassy polycarbonate is influenced more by the local chain dynamics rather than by the overall free volume content. A one-dimensional lattice model was developed to help probe the effects of the distribution of energy barriers associated with polymer motion on the transport properties. Fast cooling rates generated highly restricted conformations, which hindered local motions leading to increases in the measured activation energy of diffusion. These results correlated well with a lattice model having a broad distribution of energy barriers. Annealing reduced the measured diffusion coefficients, which was shown to be consistent with narrowing of the energy barrier ...
53 citations