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The phase behavior of blends of copolycarbonates containing 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexanone (TMC-PC) and bisphenol-A repeat units with its constituent homopolymers was determined using melt mixing, solution casting, and precipitation casting methods. Miscibility was observed for all combinations except for some involving the TMC-PC homopolymer. Phase behavior was assessed using...
Polycarbonate nanocomposites were prepared using two different twin screw extruders from a series of organoclays based on sodium montmorillonite, with somewhat high iron content, exchanged with various amine surfactants. It seems that a longer residence time and/or broader residence time distribution are more effective for dispersing the organoclay. The effects of organoclay structure on color formation...
Polycarbonate nanocomposites were prepared by melt processing from a series of organoclays based on sodium montmorillonite exchanged with various amine surfactants. To explore the effects of matrix molecular weight on dispersion, an organoclay was melt-mixed with a medium molecular weight polycarbonate (MMW-PC) and a high molecular weight polycarbonate (HMW-PC) using a twin screw extruder. The effects...
The fracture of thin (3.18mm) and thick (6.35mm) specimens of polycarbonate (PC), acrylonitrile–butadiene–styrene (ABS) and PC/ABS blends with both standard and sharp notches was examined by standard Izod and single edge notch three point bend (SEN3PB) instrumented Dynatup tests. Ligament lengths were varied for SEN3PB samples and the corresponding fracture data were represented by plotting the specific...
A detailed characterisation of the high speed fracture behaviour of polycarbonate/core-shell impact modifier blends using thick (6.25 mm) injection moulded bars with sharp notches via the Vu-Khanh methodology and data analysis is described. This expands on a previous report that examined the effect of polycarbonate molecular weight and melt blending conditions on the customary stress-strain and impact...
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