Zeigler-Natta catalyst is used to prepare
Question:

Zeigler-Natta catalyst is used to prepare

Updated On: Jun 4, 2024
  • low -density polythene
  • high density polythene
  • Nylon-6
  • Teflon
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The Correct Option is B

Solution and Explanation

High density polythene (HDP) or high density polyethylene (HDPE) is prepared by coordination polymerization of ethene at 60160C 60^{\circ} -160^{\circ} C and 6-7 atm. pressure in the presence of Zeigler-Natta catalyst (triethylaluminium and titanium trichloride or tetrachloride). nCH2=CH2>[333343K67atm][Zeigler Natta catalyst][CH2CH2]nHigh density polythenen\,CH_2 = CH_2 { ->[{333-343 K 6-7 atm}][{\text{Zeigler Natta catalyst}}] }\underset{\text{High density polythene}}{{[CH_2-CH_2]_{n}}}
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Concepts Used:

Biodegradable Polymers

Microorganisms destroy biodegradable polymers in an appropriate amount of time, ensuring that biodegradable polymers and their degraded products have a low environmental result. Enzyme-catalyzed processes shatter these polymers down into little segments, and microorganisms manufacture these enzymes.

Biodegradable Polymers: Examples

  1. Poly-β-hydroxybutyrate-co-β-hydroxy valerate (PHBV)
  2. Polylactic Acid (PLA)
  3. Poly (ε-caprolactone) (PCL)
  4. Nylon-2-Nylon-6

Biodegradable Polymers: Properties

  1. Can maintain strong mechanical unification until they are degraded.
  2. Degradation, in general, starts at the end groups because biodegradable polymers have exceptionally strong carbon backbones that are difficult to crack.
  3. Non-toxic in nature.
  4. Degradation rates can be controlled.
  5. Lack of crystallinity, which inhibits access to end groups.
  6. Hydrophilic polymers.

Read More: Biopolymers