Carbon fiber reinforced polymer as epoxy, but other thermoset or thermoplastic polymers, such as polyester, vinyl ester, or nylon, are sometimes used. The composite material may contain aramid (e.g. Kevlar, Twaron), ultra-high-molecular-weight polyethylene (UHMWPE), aluminium, or glass fibers in addition to carbon fibers. The properties of the final CFRP product can also be affected by the type of additives introduced to the binding matrix (resin). The most common additive is silica, but other additives such as rubber and carbon nanotubes can be used. The material is also referred to as "graphite-reinforced polymer" or "graphite fiber-reinforced polymer" ("GFRP" is less common, as it clashes with
The City Of London Phonograph and Gramophone Society London throughout its history, with meetings presently held at Conway Hall. By the mid 1960s, the interest in radios as a hobby had waned, and the group renamed themselves with their present name to reflect their interest in early recorded sound technology. One of the Society's patrons is Oliver Berliner, grandson of the recording pioneer Emile Berliner. Since 1963, the society has published its magazine, initially named "The Hillandale News" and now called "For the Record". These publications have been a significant vehicle for research on early recordings. The City Of London Phonograph and Gramophone Society The City Of London