Polycarbonate, plastics

Molding. The Hquid tempered chocolate is deposited into a metal or plastic (polycarbonate) mold in the shape of the final product. There are three basic types of mol ding soHd (or block), sheU, and hoUow. 

ISO 1628-4 1999 Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 4 Polycarbonate (PC) moulding and extrusion materials ISO 7391-1 1996 Plastics - Polycarbonate (PC) moulding and extrusion materials - Part 1 Designation system and basis for specifications ISO 7391-2 1996 Plastics - Polycarbonate (PC) moulding and extrusion materials - Part 2 Preparation of test specimens and determination of properties ISO 11963 1995 Plastics - Polycarbonate sheets - Types, dimensions and characteristics. 

In the early literature it is suggested that polycarbonates can be easily plasticized with common plasticizers. Plasticization of polycarbonate has been investigated by Kozlov et al. (12). These authors described the influence of plasticization on softening points and mechanical properties of bisphenol A polycarbonates. They conclude that the behavior of plasticized polycarbonate is similar to that encountered for most amorphous polymers. The influence of crystallization effects promoted by the plasticizer was not taken into account. 

The glass transition temperatures of the plasticized polycarbonates have been determined by measuring the refractive index of properly compounded films as a function of temperature. The glass transition temperatures are those temperatures... 

Figure 3. Glass transition temperatures for cast and pressed films of plasticized polycarbonate as a function of the weight fraction of plasticizer...

Figure 4. Crystalline melting points (Tm) and glass transition temperatures (T0) of plasticized polycarbonate as a function of plasticizer content...

Tabla III. Mechanical and Thermal Properties of Cast Plasticized Polycarbonate Films... 

In this context an article by Gruenwald (7) points out that a small increase in modulus of elasticity occurs in slightly plasticized polycarbonate and polyvinyl chloride. 

Twenty grams of the plasticized polycarbonate are placed between two aluminum foils, separated by four 0.5-mm. metal shims. The sandwich is placed between the heating plates of a Carver laboratory press and heated without pressure to 260° to 280°C. At this temperature a pressure of 24,000 p.s.i. is gradually applied for 15 seconds. After 10 seconds more, the plates are water-cooled while still under pressure. As soon as the plates are cooled to 20° to 25°C., pressure is released and the pressed film is removed. 

In protein separations, adsorption of protein molecules to the channel wall is always a problem. For instance, adsorption of green fluorescent protein (GFP) to the walls of plastic polycarbonate microchannels is problematic [597]. To avoid protein adsorption, the microchannels normally need to be treated with coatings, such as (acryloylaminopropyl)trimethylammonium chloride (BCQ), [806,809,812] or methacrylocyloxyethylphosphorylcholine (MPC) [1032]. In... 

Plastics that are commonly processed by extrusion include acrylics (polymethacrylates, polyacrylates) and copolymers of acrylonitrile cellulosics (cellulose acetate, propionate, and acetate butyrate) polyethylene (low and high density) polypropylene polystyrene vinyl plastics polycarbonates and nylons. The material properties and extrusion properties have been reviewed by Whelan and Dunning.Additives that may be included to modify or enhance proper-ties include lubricants and antislip agents to assist processing during extrusion plasticizers to achieve softness and flexibility stabilizers and antioxidants to retard or prevent degradation and dyes and pigments. 

Calibre. [Dow Plastics] Polycarbonate resin engineering thermoplastic for food contact, medical, transportation, appliance, housewares, business machines, recreation, and service industries. 

Hyzod . [Sheffield Plastics] Polycarbonate sheet for aircraft seat parts, tables, lavatexies, cargo liners, wi w reveals, partitions, and moldings. 

ZdaxW . [Westlake Plastics] Polycarbonate for windows in combat helicopters, visors on ace helmets, hd-tecdve enclosures to bank tellers, ptxt-htdes in pressure chamben. 

Polyacetal (Delrin) Acrylic resin plastics Polycarbonate... 

The adhesives will bond almost all materials (though a primer may be needed with some), except polyolefin plastics (eg Polythene) and other low surface-energy types such as fluoropolymers (eg Teflon) and silicone-based rubbers. Alkaline glass may cause premature bond failure and all glasses should be silane primed if at all possible, as this considerably improves the joint s humidity resistance. May stress crack stressed mouldings or susceptible plastics - polycarbonate, for example. 

Spherulitic and Single Crystal Growth Rates.—Rate measurements have been made on poly(ethylene oxide), plasticized polycarbonate, and polydioxolan. ... 

Jeon CH, Ryu SH, Chang YW (2003) Optical properties of plasticized polycarbonate. Polym Int 53 153-155... 

Figure 3.23 Stress levels for cycles to failure for different plastics polycarbonate ( ), PP ( ), acrylonitrile-butadiene-styrene (ABS) (A), HDPE ( ) [32]...

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