Question 27 (Textile Technology & Fibre Science)
Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
[a]: The reaction temperature and rate of agitation during polymerization of polyethylene
terephthalate have an important effect on molecular weight of the polymer produced.
[r]: Polymerization of polyester by melt polycondensation is a predominantly diffusion
controlled process.
| (A) | Both [a] and [r] are true and [r] is the correct reason for [a] |
| (B) | Both [a] and [r] are true but [r] is not the correct reason for [a] |
| (C) | Both [a] and [r] are false |
| (D) | [a] is true but [r] is false |
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Frequently Asked Questions | FAQs
What is PET fibre?
PET fiber stands for Polyethylene Terephthalate fiber, which is a synthetic fiber made from a polymer of the same name. PET is a type of polyester, and it is commonly used to make fibers for clothing, upholstery, carpets, and other textiles. PET fiber is produced by melt spinning the polymer, which involves melting the PET pellets and extruding them through spinnerets to create continuous filaments. These filaments can then be cut to different lengths to create fibers of varying sizes.
PET fibers are known for their excellent strength, durability, and resistance to moisture and chemicals. They are also lightweight and can be easily dyed in a wide range of colors. In addition, PET fibers are eco-friendly, as they can be recycled and used to create new fibers, reducing the amount of waste produced. PET fibers are commonly used in the production of outdoor fabrics, as they can withstand exposure to sunlight and weather conditions without degrading. They are also used in the production of nonwoven fabrics for industrial and consumer applications.
What is PET fibre made from?
PET fiber is made from a synthetic polymer called polyethylene terephthalate (PET). PET is a type of polyester that is commonly used in the production of fibers, films, and other materials. The PET polymer is produced through a chemical reaction between ethylene glycol and terephthalic acid or dimethyl terephthalate.
The production process for PET fiber involves melting the PET pellets and extruding them through spinnerets to create continuous filaments. These filaments are then cooled and solidified to create fibers. The fibers can be cut to different lengths to create fibers of varying sizes.
PET is a versatile material that can be made into a variety of different forms, including fibers, films, and bottles. PET bottles are commonly used for packaging beverages and other products, and they can also be recycled to create new PET products, including PET fiber. PET fiber is eco-friendly, as it can be recycled and used to create new fibers, reducing the amount of waste produced.