Polymers 101

Polymers 101

𝗜𝗻𝗱𝗲𝘅:
⏲ 0:00 What is polymer?
⏲ 1:52 Natural polymers
⏲ 2:11 Thermoset vsThermoplastic
⏲ 2:44 Production of polymers

📫𝐎𝐮𝐫 𝐅𝐁 𝐏𝐚𝐠𝐞:
https://www.facebook.com/ScienceWorld-106933907791981

🎬𝐈𝐦𝐚𝐠𝐞𝐬, 𝐚𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 𝐚𝐧𝐝 𝐯𝐢𝐝𝐞𝐨𝐬 𝐜𝐫𝐞𝐝𝐢𝐭𝐬:
- Pexels
- Chemical Molecular Background in Black - Video 515208
Source: https://www.youtube.com/watch?v=rm8jvFnxePE&ab_channel=RoyaltyFreeBackgroundandFootage
Artist: https://www.youtube.com/channel/UC7tDUCjW2CFGGc0G_LUCykg

📚𝐃𝐚𝐯𝐢𝐝'𝐬 𝐁𝐨𝐨𝐤𝐬
📕 𝗪𝗲𝗶𝗿𝗱 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗘𝗱𝗴𝗲 𝗼𝗳 𝗜𝗻𝗳𝗶𝗻𝗶𝘁𝘆 𝗮𝗻𝗱 𝗕𝗲𝘆𝗼𝗻𝗱
(https://www.amazon.com/Weird-Maths-Agnijo-Banerjee-Darling/dp/1786072645)
📙 𝗪𝗲𝗶𝗿𝗱𝗲𝗿 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗘𝗱𝗴𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗣𝗼𝘀𝘀𝗶𝗯𝗹𝗲
(https://www.amazon.com/Weirder-Maths-At-Edge-Possible/dp/1786075083/)
📗 𝗪𝗲𝗶𝗿𝗱𝗲𝘀𝘁 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗙𝗿𝗼𝗻𝘁𝗶𝗲𝗿𝘀 𝗼𝗳 𝗥𝗲𝗮𝘀𝗼𝗻
(https://www.amazon.com/Weirdest-Maths-David-Darling/dp/1786078058/)
** The kindle versions are available
*** For more details : http://weirdmaths.com/

📄𝐓𝐞𝐱𝐭:
Polymers are macromolecules that consist of repeated small molecules. We’re surrounded by polymers. Plastic bags, packaging products, pans, toothbrushes, cables, car wheels, plastic bottles, clothes, insulating materials, bulletproof materials, shoes, windows, adhesives, pens, balloons, gums, glasses, phones, computers, umbrellas, toys and more are made mainly of polymers.

For example this molecule is ethylene, also known as ethene. When ethylene molecules link together, long-chained macromolecules of polyethylene (or PE) are formed. Polyethylene is mainly used in the production of packaging materials such as plastic bags, bottles, films and caps.

This molecule is vinyl chloride. As you can see, it’s just one atom different than ethylene. But when vinyl chloride molecules are joined together, the result is polyvinyl chloride (PVC), which is commonly used to make window frames and doors. Replacing only one atom causes the chemical and physical properties of the substance to be completely different. So, as you can imagine, there are countless different types of polymers with different chemical and physical properties.

Like PE and PVC, some polymers are formed by only one kind of molecule whereas others are built up from 2 or more different kinds of molecules. For example, this is PET. It’s formed by reacting terephthalic acid and ethylene glycol and is mostly used to make plastic bottles.

Besides artificial polymers, there are also natural polymers such as silk, wool, DNA and rubber. If we take a look a single chain of a DNA molecule, we can see that it consists of repeated molecules of sugar, phosphate and a base.

Polymers are divided into thermoset and thermoplastic polymers according to how they behave at different temperatures. While thermoset polymers can’t be softened and melted with heat, thermoplastics can be melted and reused. So thermoplastic polymers are easily recycled, whereas the recycling of thermoset polymers is difficult and expensive. So mainly thermoplastic polymers are recycled (2). Both polymer types undergo combustion at high temperatures.

In the real word, polymers and polymer products are made by different companies. Polymers are commonly supplied as solid small particles called pellets. These pellets are then heated and processed by methods such as molding and blowing. When they cool down the products are ready for use.

#polymer #plastic #chemistry

Видео Polymers 101 канала ScienceWorld