Polymers
Muhtasari
Plastics are everywhere, from drink bottles to clothing, and almost all of them are polymers: giant molecules built by joining thousands of small units together. Understanding how these long chains form, from simple alkenes, explains both their usefulness and their environmental challenges.
In this lesson you will learn what a polymer and a monomer are, how many alkene monomers join by addition polymerisation to make a polymer such as poly(ethene), and why the strength of these molecules also makes their waste so hard to dispose of.
Malengo
- [Core] Define polymers as large molecules built up from many smaller molecules called monomers
- [Core] State that the formation of poly(ethene) is an example of addition polymerisation using ethene (an alkene) monomers
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Hongera kwa kukamilisha somo la Polymers. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
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- A polymer is a large molecule made by joining many: A. Atoms of one element B. Monomers C. Salts D. Acids Answer: B
- The monomer used to make poly(ethene) is: A. Ethane B. Ethene C. Ethanol D. Ethanoic acid Answer: B
- In addition polymerisation, the monomers join because their: A. -OH groups react B. Double bonds open C. Single bonds break D. Acids neutralise Answer: B
- In addition polymerisation, the number of products formed is: A. Only the polymer B. The polymer and water C. The polymer and carbon dioxide D. Two polymers Answer: A
- A major environmental problem with addition polymers is that they: A. Dissolve in water B. Do not break down easily C. Evaporate quickly D. React with air Answer: B
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Vitabu Vinavyopendekezwa
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Sehemu ya kitabu
Synthesis of Biological Macromolecules
Understand the synthesis of macromolecules
"Biology: Synthesis of Biological Macromolecules" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/3-1-synthesis-of-biological-macromolecules. Access for free at https://openstax.org/books/biology/pages/1-introduction
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