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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TL;DR: In this paper, a general-purpose neural network is used to predict the glass transition temperature to within 10 K of experimentally reported values, which can be extended to any property for which quality data are available.
52 citations
Patent•
02 Apr 2003TL;DR: In this article, a method for producing a thermoplastic sheet includes extruding a composition including a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm.
Abstract: A method for producing a thermoplastic sheet includes extruding a composition including a melt polycarbonate resin having a Fries content of about 10 ppm to about 2000 ppm. The composition enables the sheet to be extruded with excellent uniformity.
52 citations
Patent•
01 Nov 1971TL;DR: In this paper, a low molecular weight poly(halogenated dihydrid phenol carbonates), which are efficient flame retardant agents for flammable thermoplastic resins, including those with high ignition temperatures, is provided.
Abstract: There are provided low molecular weight poly(halogenated dihydrid phenol carbonates), which are efficient flame retardant agents for flammable thermoplastic resins, including those with high ignition temperatures. Illustratively, aromatic polycarbonate, poly-(alkylene terephthalate), acrylonitrilebutadiene-styrene, and polyphenylene ether thermoplastic resins are rendered self-extinguishing by incorporation of a low molecular weight polymer of a carbonate of tetrabromobisphenol-A, chain-stopped with tribromophenol.
52 citations
TL;DR: In this article, the thermally stimulated current thermal sampling (TSC-TS) technique was used to study the cooperative glass transition like relaxations in different tacticity poly(methyl methacrylates) (PMMAs) including iso-and syndiotactic forms.
Abstract: The thermally stimulated current thermal sampling (TSC-TS) technique was used to study the cooperative glass transition like relaxations in different tacticity poly(methyl methacrylates) (PMMAs) including iso- and syndiotactic forms We use the high sensitivity of the TSC-TS method to study these weak and sometimes overlapping relaxations at a frequency of about 10 -3 Hz where one can resolve cooperative relaxations well below the main glass transition (Tg), even if the species are a minor fraction of the overall relaxing species The magnitudes of the values of E a are compared with a theoretical prediction as a function of temperature, showing that the low-temperature tail of the glass transition in conventional atactic (eg, 45% syndiotriads) extends down to 15 °C, while in our highest syndiocontent PMMA (80% syndiotriads), the glass-transition-like relaxations only extend down to about 80 °C Results taken from the literature also substantiate the results obtained here for atactic PMMA The results are contrasted to those for bisphenol-A polycarbonate and other polymers and suggest that compositional heterogeneity, more specifically the presence of low T g pockets of predominantly isotactic sequences, contributes to the broad glass transition extending almost 90 °C below the main glass transition in atactic PMMA
52 citations
Patent•
12 Jun 1999TL;DR: In this article, the graft polymer and phosphorus compounds are produced by means of a mass, dilution or mass suspension polymerisation process, which is called mass-suspension polymerization.
Abstract: The invention relates to thermoplastic moulding materials on the basis of polycarbonate and/or polyester carbonate. Said thermoplastic materials contains graft polymer and phosphorous compounds of general formula (I). Said graft polymer and phosphorus compounds are produced by means of a mass, dilution or mass suspension polymerisation process.
52 citations