high-styrene butadiene
71Thermoplastics — A thermoplastic is a plastic that melts to a liquid when heated and freezes to a brittle, very glassy state when cooled sufficiently. Most thermoplastics are high molecular weight polymers whose chains associate through weak Van der Waals forces… …
72Acetonitrile — Acetonitrile …
73National Iranian Petrochemical Company — The National Iranian Petrochemical Company (NIPC), a subsidiary to the Iranian Petroleum Ministry, is owned by the government of the Islamic Republic of Iran. It is responsible for the development and operation of the country s petrochemical… …
74History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
75Spud gun (cannon) — This article is about pipe based cannons and similar which use air pressure, or combustion of a gaseous fuel, or both, to launch large projectiles at low speed. They are in two types: * To fire whole potatoes. These launchers are built and fired… …
76Spud gun — For the child s toy which fires small pieces of potato, see spud gun (toy). A pneumatic potato cannon A potato cannon (also known as a spud gun or spudzooka ) is a pipe based cannon which uses air pressure (pneumatic), Propellant, or… …
77Materials science — Simulation of the outside of the Space Shuttle as it heats up to over 1,500 °C (2,730 °F) during re entry into the Earth s atmosphere Materials science is an interdisciplinary field applying the properties of matter to various areas of… …
78Nikon FA — Controls The Nikon FA was an advanced amateur …
79Motorcycle fairing — This article is about motorcycle design. For other uses of fairing , see Fairing (disambiguation). 1956 NSU world record setting Dolphin II …
80Rubber toughening — Many thermoplastics such as polystyrene and PMMA are brittle when stressed, a property which limits applications. A good way of strengthening such polymers is to copolymerise elastomeric chains during manufacture. The elastomer chains form… …
