17TX41 Textile Fibre Physics syllabus for ST

Introduction to structure of fibers. Approaches to polymer fiber structure. List of parameters for reasonable specification of fiber structure analysis of solid state structure of textile fibres using DGC, X-rays, IRS, NMR, SEM and TEM. Study of two phase and one phase model of fibre physical structure

Discussion on descriptive studies on of physical structure of Cotton, Wool, Silk, PET, Nylon and Acrylic fibres. Moisture relations: Concept of moisture equilibrium, moisture hysteresis, moisture regain, heat of absorption, swelling of textile fibres. Effect of moisture on various properties of fibres. Calculations of Mr and Mc of fibres.

Mechanical properties: Analysis of Stress and strain behaviour, Expression of results of tensile properties, factors affecting tensile behaviour, structure and tensile property correlation, Elastic recovery and weak-link effect. Stress relaxation, creep, factors affecting stress relaxation and creep. Dynamic mechanical properties and their applications.

Directional effects- Bending of fibers, Twisting of fibers, Shear modulus, Shear stresses and compression fiber masses. Frictional properties, Amonton’s laws of friction, deviation of these laws in fibre friction. Nature of fiber friction, the friction of wool fibers

Introduction of Optical properties, measurement of birefringence, luster. Importance of optical properties Electrical properties: Electrical resistance, static electricity, dielectric properties and measurement of these properties. Thermal properties: Thermal conductivity, specific heat, thermal expansion and directional dependence of these thermal properties.

COURSE OUTCOME

1. This course work prepares students to face problems related to fiber behavior in various fields of textiles viz; Spinning, Weaving, Chemical processing and Garmenting.

2. As this subject deals with most fundamental aspects of textiles (fibers), in-depth knowledge in this subject helps in carrying out any kind of research in textile and allied fields.

Graduate Attributes (as per NBA)

• Engineering Knowledge
  
• Problem Analysis
  
• Design/development of solutions (partly)
  
• Interpretation of data

Scheme of Examination / Question paper pattern

• Two full questions (with a maximum of four sub questions) of TWENTY marks each to be set from each module. Each question should cover all contents of the respective module.
• Students have to answer five full questions choosing one full question from each module

Text Book:

1. Physical properties of Textile fibres, Morton & Hearle, J.W.S., TI, London, 4008.

2. Manufactured fibre technology, V.B.Gupta and Kotari V.K., Chapman & Hall, London.

3. Mechanical properties of polymers, Ward I.M., John wiley & sons, NY 1971.

References:

1. Mechanical properties of polymer, Neilson L.E., VolI,II, III, Marcel Dekkar, NY, 1974.

2 Polymer Characterization, Cambel and White, Chapman & Hall, London 1989.

3. Moisture relations in textiles, Hearle J.W.S., Textile Institute, London.