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Property Improvements of Epoxy Resins with Low Molecular Weight Polyphenylene-ether (PPE) Resin

IP.com Disclosure Number: IPCOM000005721D
Publication Date: 2001-Oct-30
Document File: 1 page(s) / 19K

Publishing Venue

The IP.com Prior Art Database

Abstract

PPO SA120 resin is a new low molecular weight (Mn »2500) polyphenylene-ether (PPE) resin recently commercialized by GE Plastics as a polymer additive. In addition to having the well-known properties inherent to PPE, this new resin has an excellent thermal performance--glass transition temperature (Tg) of 165°C combined with a characteristic feature of improved processability. The low molecular weight of the new PPE resin allows PPE to be more easily processed in epoxy systems. Lower molecular weight leads not only to reduced viscosity but also to lower mixing temperatures. Comparative examples of PPO SA120 and other PPE grades are shown in the report. Additionally, new functionality can be applied to the PPE to improve the reactivity of PPE in epoxy systems. Reported herein is an evaluation of PPO SA120 resin and functionalized PPE resins in various epoxy systems. Improvements in fracture toughness, electrical properties, glass transition temperature (Tg), and water absorption are gained with the addition of PPE. Also shown are the effects of PPE on viscosity and phase separation temperature for many epoxies. What is seen is that the best PPE resin and concentration for an epoxy system will vary depending of the epoxy resin and the required properties of the epoxy. Key Words: polyphenylene oxide, PPO, polyphenylene ether, PPE, Polyoxyphenylene, epoxy, toughness

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