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  • Down-to-earth role for imidized polymers
    , Wilmington, Del. These NMPIs are based on the condensation polymerization of pyromelletic dianhydride and oxydianiline. More recently, Quadrant Engineering Plastic Products, Reading, Pa., (formerly DSM EPP) introduced a NM-PI called Duratron XP. Each member of this imide family is inherently flame
  • Down-to-earth role for imidized polymers
    notable are Vespel shapes and Kapton films from DuPont, Wilmington, Del. These NMPIs are based on the condensation polymerization of pyromelletic dianhydride and oxydianiline. More recently, Quadrant Engineering Plastic Products, Reading, Pa., (formerly DSM EPP) introduced a NM-PI called Duratron XP
  • Use of Infrared Imaging Techniques to Understand and Quantify Expanded Polymer Molding Operations and Part Quality (.pdf)
    . for the molding cycle of a press/hold system. and moisture profile of the molded part upon ejection. Figure 5 shows a WTI display panel for a press/mold process showing the molding pressures and the. moisture profiles of the part upon ejection. When steam enters the mold, some condensation occurs on the bead
  • Medical Device Link . Developments in Surface Treatment Technologies
    Tran Ltd. (Northampton, UK) specializes in the deposition of parylene films by means of vapour condensation. The polymer coating is, in fact, grown one molecule at a time, according to marketing manager Chris Hardy, and therefore it provides complete and uniform coverage. Ample mechanical and barrier
  • Medical Device Link . EXPLAINING DUCTILITY LOSS IN STEAM-STERILIZED POLYCARBONATE
    . Condensation polymers such as polyesters and copolyesters are also known to undergo similar hydrolysis and can lose mechanical properties as a consequence of hot-water aging. Most of the studies involved long-term aging on the order of days or months. Other investigations focused on the effects
  • Types of Plastics
    . Phenolic, urea, and melamine thermoset plastics are polymerized by a "condensation" reaction, wherein a by-product (water, for example) is created during the reaction in the mold. Such volatile by-products cause dimensional instability and low part strength unless they are removed during molding.
  • MICRO: Product Tech News
    , and removing polymers from laminated oxide-etch parts. A turbo pump that goes from atmosphere to high vacuum, the OnTool booster pump is used in clean applications that operate without particulate matter, corrosive gases, or condensation. Used in loadlocks in IC manufacturing equipment, the turbo
  • Humidity sensors
    . A dielectric layer made from a thin polymer film or a metal oxide is placed between two metal electrodes. The surface electrode is porous so water vapor in the air reaches the dielectric layer yet still protects it from contamination and exposure to condensation. At 50% RH, the capacitance

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