Sheet molding compounds high-performance

Nylons Molded, Extruded Type 6 Flexible Copolymers Epoxies High Performance Resins Molded Standard Epoxies Cast Rigid Reinforced Polyester Sheet molding compounds, general purpose 0.007—0.010 0.0071—0.025 0.0074 0.0087—0.04... 

Polyetherimide (Ultem 1000, GEC) is a high performance engineering thermoplastic with high heat distortion temperature (> 200°C), high mechanical strength and inherent flame-retardancy characteristics. Recently blends of polyetherimide with polycarbonate have been commercially offered as thermoformable sheets and as molding compounds (Table 15.28). The primary reason for... 

Impact modifiers are usually prepared by grafting methylmetacrylate and styrene on a styrene-butadiene rubber in an emulsion process (29,30). The preparation and properties of these polymers has been reviewed (31). Impact efficiency is achieved by controlling the rubber substrate particle size between 1000 and 3000 A in a narrow distribution range. The solubility-incompability balance determines the performance of impact modifiers. Typical opaque compound impact modifiers show high efficiency. High-efficiency impact modifiers are used in PVC conduit, injection molding components and calendered opaque films and sheets. Various types of impact modifiers are available (32,33). 

---