Failure of Polycarbonate/Polyethylene Terephthalate Appliance Housings
Housings (being tested as part of a material conversion) from an electrical appliance failed during an engineering evaluation. They had been injection molded from a commercial polycarbonate/PET blend. Parts produced from the previous material, a nylon 6/6 resin, had consistently passed the testing regimen. Grease was applied liberally within the housing assembly during production. Investigation included visual inspection, 24x SEM images, micro-FTIR in the ATR mode, and analysis using DSC. No signs of material contamination were found, but the thermograms showed a crystallization of the PET resin. The grease present within the housing assembly, analyzed using micro-FTIR, was composed...
Failure of Polycarbonate/Polyethylene Terephthalate Appliance Housings, ASM Failure Analysis Case Histories: Household Products and Consumer Goods, ASM International, 2019, https://doi.org/10.31399/asm.fach.homegoods.c0090448
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