| 单词 | polystyrene |
| 释义 | polystyrene[ pol-ee-stahy-reen, -steer-een ] / ˌpɒl iˈstaɪ rin, -ˈstɪər in / noun Chemistry.a clear plastic or stiff foam, a polymer of styrene, used chiefly as an insulator in refrigerators and air conditioners. Origin of polystyreneFirst recorded in 1925–30; poly- + styrene Words nearby polystyrenepolyspermia, polyspermy, polystichia, polystichous, polystyle, polystyrene, polysulfide, polysulphide, polysuspensoid, polysyllabic, polysyllable Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for polystyrenepolystyrene / (ˌpɒlɪˈstaɪriːn) / nouna synthetic thermoplastic material obtained by polymerizing styrene; used as a white rigid foam (expanded polystyrene) for insulating and packing and as a glasslike material in light fittings and water tanks Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for polystyrenepolystyrene [ pŏl′ē-stī′rēn ] A brittle synthetic polymer composed of repeated styrene units. Polystyrene is transparent and rigid because the benzene rings in each styrene unit prevent the polystyrene chains from arranging themselves into a tight crystalline structure. Polystyrene has a wide variety of uses, especially as a solid foam for insulation and packaging. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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