A general study on the orientation of the molecules along with atoms in the textile fibres monomer and polymer

1. Orientation of Molecules in
Fibres
Taukir Kabir Tusar
B.Sc. In Textile Engineering (BUTex)
Trainee – QA & Technical
Asmara International Limited

2. What is orientation for fibres ?
• Orientation for fibres (textile fibres) can be
said as the structural arrangement of the
molecules on the fibreous matter .
• It has been found that the molecules which
form the fibres which is spinnable to yarn
should also be long and the molecules should
also be thread like too. By this , the atoms
within the molecules can strung together
which will ultimately make the fibre spinnable.

3. So basically we get ….
• Atoms ( 10-1000 numbers of different
types string together one after another to form a
molecule)
• Molecules (All the atoms forming long and
thread like molecules)
•
• Spinnable Fibres (Finally this molecules
make a long chain having thread like
characteristics)

4. A very common example ( Cotton
fibre)

5. A very common example ( Cotton
fibre) – contd.
• As per previous slide diagram , this glucose
structure got 6 carbon , 12 hydrogen and 6
oxygen atoms . They are forming glucose
structure and the glucose molecules get
arranged in linear range and forming thread
like cotton monomer !

6. A very common example ( Cotton
fibre) – contd.
• And this cotton monomer glucose molecules
lie in the fibre structure in one direction and
forming the final cotton fibre.
• And for this cotton fibre , this repeating
molecular unit (called monomer) should be in
5000-15000 number in range

7. Don’t Get Confused !!
• It is glucose molecule , it is not spinnable
. But it has Carbon © , Hydrogen (H) and Oxygen
(O) atoms in it
• It is forming this molecule ,which you
can say cotton molecule / cotton monomer
which contains glucose molecules into it but yes
they are chemically bonded and it is spinnable
when forming polymer

8. A diagram ….
• Carbon © , Hydrogen (H) and Oxygen (O)
atoms forming Glucose Molecule
• Glucose Molecule is forming Cotton
Monomer
• Cotton Monomer forms Cotton Polymer in a
particular repeat range of cotton monomer (
Called DP- Degree of Polymerization)

9. So we get - A very common tendency
of spinnable fibres molecules
• To lie majority of the molecules in the fibre
in one direction ( to provide sufficient
strength ) in the fibre monomer
• And this tendency is similar to the individual
strands within the yarn tending to be oriented
in one direction – and this is just to provide
sufficient strength to the yarn so it can
withstand along the further textile processing

10. An Additional Talk
• In the molecules of the repeating unit called
monomer , they must not have too much
pendanting groups of atoms (side groups of
atoms sticking out than linear structure) .
This will restrict the ultimately long molecules
(monomers) to get packed together to provide
sufficient strength . – It is also one
considerable thing for textile fibre

11. An Additional Talk (contd.)
• When the long molecules having low
pendanting groups of side atoms , they can
get tightly joined by lying side-by-side and can
exert strong forces of attraction which is the
mother of many textile fibres physical
properties like tensile strength , breaking
strength , elongation , tenacity and a lot !

12. So whatever we get !??
• Atoms in the molecule/monomer should not
have too much side chains of atoms
• Atoms should posses linear structure as much
as possible in the molecule/monomer
• And this majority of the molecules in the
polymer should lie in one direction to provide
sufficient strength that gives birth to many
physical properties of textile fibre .

13. Goodbye for Now
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