Phenolformaldehyde plastics

The products discussed above touch us in every moment of our lives. We wake in the morning to an alarm clock in a polystyrene case we arise from our polyester blend sheets and slip on a pair of slippers glued with polyurethane glue. We flip the polymethylmethacrylate light switch and walk across a Nylon carpet to the bathroom. Our polymethylmethacrylate toothbrush is sitting on the Formica counter top. It has Nylon bristles. The soap we use to wash our face may be hydrocarbon derived sodium lauryl sulfate. We walk to the kitchen with polyvinyl chloride floors and sit at a Formica table. The polyethylene milk carton is at hand to supply the milk for the cereal stored in the polyethylene bag. It is eaten from a urea formamide bowl. The frying pan has a phenolformaldehyde plastic handle and a Teflon interior coating. 

Physical effects caused by polyethylene glycol bases include softening and liquefaction in mixtures with phenol, tannic acid, and salicylic acid. Discoloration of sulfonamides and dithranol can also occur and sorbitol may be precipitated from mixtures. Plastics, such as polyethylene, phenolformaldehyde, polyvinyl chloride, and cellulose-ester membranes (in filters) may be softened or dissolved by polyethylene glycols. Migration of polyethylene glycol can occur from tablet film coatings, leading to interaction with core components. 

Plastics Cyanoacrylate, epoxy resins, polyacrylates, phenolformaldehyde resins, polyurethane, rubber additives (thiuram, carbamates)... 

If one compares the smoke-formation in combustion of 2-3 mm of samples from ABC-plastics, pol5winylchloride, polystyrene, polycarbonate, polytetrafluorethylene, phenolformaldehyde resin, polyestersulfone. 

Presently in cryogenics, composite polymer materials are widely used. These are glass and carbon plastics based on epoxy and phenolformaldehyde resins. But there are scanty data on their thermophysical properties, and they refer, as a rule, to positive temperatures. 

Plastics, such as acrylates and phenolformaldehyde resins (see also epoxy resins)... 

The high modulus and creep resistance of reinforced PPS compounds make them more suitable than many other plastic materials for fastening with bolts, screws, or rivets. For one-time bolted assemblies, tapped or molded-in threads with bolts screwed in three to four diameters may be used. However, with bolted assemblies where repeated assembly and disassembly of parts are expected, or if torque retention at elevated temperature is a concern, ultrasonic or molded-in metal inserts may be used. Molded-in metal inserts should be preheated to the mold temperature before being placed in the tool for molding. For assembly with self-tapping screws, BF-type or BT-type steel thread cutting screws work well, using hole sizes as recommended for phenolformaldehyde thermosets by the... 

Figure 3.356. Dependence of wear of some plastic materials by temperature [959] I) plasticized PVC II) plasticized PMMA 111) pressing powder K-18-2 based on phenolformaldehyde resin IV) epoxy resin of high-thermal stability. Applied load 3, 9) 13 MPa 8, 12) 0.13 MPa 2, 11) 0.10 MPa 1, 10) 0.05 MPa 1) 0.05 MPa 6) 0.003 MPa 5) 0,015 4) 0006 MPa.

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