From Atoms to Materials

polystyrene 聚苯乙烯 expanded polystyrene 發泡聚苯乙烯 fragile 易碎 There are many more plastics besides those introduced above. Some new plastics are designed for specific purposes. Search for more information, and present your findings below. Explorer Language tip Some polymers are named by adding poly- in front of the names of their monomers: • ethene poly (e)thene ( e is omitted for easy pronunciation) • propene poly propene • vinyl chloride poly vinyl chloride Polystyrene* (PS) Properties • highly transparent • hard and brittle Uses Unifying concept The uses of different types of plastics depend on their particular properties. These properties depend on the form of their molecules. This is an example of form and function . Expanded polystyrene* Properties • very light • excellent insulator of heat • good for absorbing shock Uses 13.6 Other plastics polyester, nylon, polytetrafluoroethene, urea-methanal, … What plastics are used in 3D printing? packaging material for fragile* goods heat-insulating containers transparent container Uses: Properties: Name of plastic: Uses: Properties: Name of plastic: 94 © United Prime Educational Publishing (HK) Limited 2024 All rights reserved; no part of this publication may be reproduced, photocopied, recorded or otherwise, without the prior written permission of the Publisher. Sample