Why is Bakelite a thermosetting polymer?
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Why is Bakelite a thermosetting polymer?
Bakelite contains cross links, or heavily branched polymer chains. Bakelite polymer, upon heating is hardened and cannot be softened again. Hence, it is a thermosetting polymer.
Is Bakelite example of thermosetting plastic?
Bakelite is a rigid type of plastic which is highly resistant to heat. It cannot be recycled or melted once it gets cured during the compression moulding process. It is formed from the condensation reaction of phenol and formaldehyde. Bakelite is an example of thermosetting plastic.
Is Bakelite a thermosetting plastic Class 8?
Bakelite is one example of a thermosetting polymer. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated.
What kind of plastic is Bakelite?
Bakelite was the first plastic made from synthetic components . It is a thermosetting phenol formaldehyde resin .
What is Bakelite thermoplastic?
Bakelite is first plastic made from synthetic components. It is thermosetting phenol formaldehyde resin. Formed by condensation of phenol with formaldehyde.
Is polystyrene a thermoplastic?
Polystyrene is a versatile thermoplastic that is available in a wide range of formulations. The range of properties available along with the ease of processing make polystyrene a good choice for many applications. Unmodified polystyrene is clear, rigid, brittle and moderately strong.
Which is a thermosetting plastic?
Melamine is a thermosetting plastic, as it cannot be re-shaped once it is being moulded in a particular shape. Melamine resin is durable, fire and heat-resistant and virtually unbreakable, making melamine products more desirable than other plastic housewares.
Is Teflon a thermosetting plastic?
Teflon is a thermoplastic. There are pseudothermoplastics that are both a thermoplastic and a thermoset. One such material goes by the trade name Matrimid 5218. It is a thermoplastic below the temperature of 250 centigrade and be melted and reworked.
What are the differences between thermoplastics and thermosetting plastics?
Question 17
| Thermoplastic plastics | Thermosetting plastics |
|---|---|
| 1. Thermoplastic can be easily bent. | 1. Thermosetting plastics cannot be easily bent. If forced to bend, they will break. |
| 2. Softens on heating | 2. Do not soften on heating |
| 3. Can be moulded and reshaped | 3. Cannot be moulded and reshaped. |
| 4. Expensive | 4. Cheaper |
Is polyethylene a thermosetting plastic?
PE is classified as a “thermoplastic” (as opposed to “thermoset”), based on the way the plastic responds to heat. Thermoplastic materials become liquid at their melting point (110-130 degrees Celsius in the case of LDPE and HDPE respectively).