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  • Living anionic polymerization of methyl methacrylate
    ., 1999). As shown in Fig. 2, a large number of propa-. Figure 1. gating chains [species (a) to (d) in Fig. 2] are formed with a small. (a) PZN catalyst, (b) Irgacure 184 (IRG) and (c) methyl methacrylate (MMA). s568. Nobuyoshi Miyamoto et al.  Polymerization of methyl methacrylate. J. Appl. Cryst. (2007
  • Measurement of Methyl Methacrylate During Joint Replacement Operations
    to the type of plastic-cement and the importance of sterile handling, the plastic-cement is produced during the operation by mixing the acrylate with the monomer methyl methacrylate (MMA). The measurements were made in the area around the surgeons face during 2 consecutive, traditional hip
  • Medical Device Link . Technology News
    A methyl-methacrylate copolymer that exhibits surprising clarity for a multiphase plastic also features impact resistance even at low temperatures and the capability to withstand EtO and gamma sterilization. Cyrolite, supplied by R ohm GmbH (Darmstadt, Germany), traditionally has been used
  • Medical Device Link . ACRYLIC POLYMERS: A CLEAR FOCUS
    . Acrylic polymer, derived from the monomer methyl methacrylate (MMA), was first developed more than 60 years ago. Since then, formulations have extended the material's performance range, resulting in varying levels of melt flow, impact resistance, colorability, gamma recovery, and other controlled
  • Artificial Lens Hazing Root-Cause Analysis
    Intraocular lenses (IOL) are often implanted as a replacement for cataract-damaged lenses, or in some cases to change the optical power of the lens. These lenses were originally made from poly(methyl methacrylate) (PMMA) but are now often silicone and acrylic. The ideal material
  • Benzoyl Peroxide Determination
    Benzoyl peroxide (BPO) is added to bone cement as a radical initiator for the methyl methacrylate monomer. BPO is highly reactive and degrades readily, with a temperature dependent half-life of one hour at 92 °C and. one minute at 131 °C. The degradation products, benzoic acid and oxygen
  • Zirconium in Organic Applications (.pdf)
    , hydroxyacetic, lactic and methacrylic acids, urea, methyl methacrylate, rayon, and various alcohols and phenolic resins. The ability of zirconium to withstand high temperatures and concentrations coupled with the fact that the zirconium ions are colorless allows its use in dye manufacturing and other areas
  • How to develop a soft touch
    . Royal Philips Electronics, the Dutch maker of the Philishave Coolskin electric shaver is the first to combine polycarbonate (PC) and a transparent ABS made from methyl methacrylate, acrylonitrile, butadiene, and styrene (MABS) using two-component injection molding. The PC housing is covered

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