Polystyrene (PS) plastic is a
naturally transparent thermoplastic that is available as both a typical
solid plastic as well in the form of a rigid foam material. PS plastic is
commonly used in a variety of consumer product applications and is also
particularly useful for commercial packaging.
The solid plastic form of
polystyrene is commonly used in medical device applications like test tubes or
petri dishes, or in day-to-day items like the housing on your smoke detectors,
the case you used to buy your CDs in, and frequently as a container for foods
like yogurt or the red "solo” cup you drink from at a tailgate and/or when
you’re losing in a game of beer-pong.The foam form of polystyrene is used most
often as a packing material.
Polystyrene is typically
a homopolymer meaning that it is composed only of the monomer styrene in
combination with itself. Depending on the type of PS it could be classified as a "thermoplastic” or a "thermoset” material. The name has to do with the
way the plastic responds to heat. Thermoplastic materials become fully liquid
at their melting point (210-249
degrees Celsius in the case of Polystyrene), but they begin to flow at their
glass transition point (100 degress Celsius for PS). A major useful attribute
about thermoplastics is that they can be heated to their melting point,
cooled, and reheated again without significant degradation. Instead of burning,
thermoplastics liquefy, which allows them to be easily injection molded and then subsequently
recycled. Thermoset plastics, by contrast, will not reliquify once they are
"set” in solid form.
PS TYPICAL.pdf [0 بایت] (حجم: 9)
EPS.pdf [0 بایت] (حجم: 9)
PT GPPS.pdf [0 بایت] (حجم: 9)
PT HIPS.pdf [0 بایت] (حجم: 9)
PT EPS.pdf [0 بایت] (حجم: 9)