JAWAHARLAL NEHRU
GOVERNMENT ENGINEERING COLLEGE SUNDERNAGAR, MANDI, H.P-175018
Department of
Textile Engineering
Subject: Properties of Fibres (TE-221)
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Course
Code
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TE-221
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L=3 T=1
P=0
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Name
of the course
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Properties of Fibres
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Lectures
to be delivered
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52
(1 Hr Each )(L=39,T=13 for each semester)
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Semester
End Examination
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Max.Time:
3hrs
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Max
Marks :100
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Min
Marks :40
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Continuous assessment
(based on sessional tests 50%, Tutorials /Assignments 30%, quiz /Seminar 10%,
Attendance 10%)
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Max
Marks :50
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Instructions
- The question paper
will consist of five sections A, B, C, D and E. Section E will be
Compulsory, it will consist of a single question with 10-20 subparts of
short answer type, which will cover the entire syllabus and will carry 20%
of the total marks of the semester end examination for the course. Section
A, B, C and D will have two questions from the respective sections of the
syllabus and each question will carry 20% of the total marks of the
semester end examination for the course.
- Candidates are
required to attempt five questions in all selecting one question from each
of the section A, B, C and D of the question paper and all the subparts of
the questions in section E. Use of non-programmable calculators are
allowed.
SECTION –A
Fiber structure: Traditional view of fibre
structure. Chemical structure and physical structure. Degree of order and
degree of orientation.
Structure
investigation: Methods of investigation of fibre structure. Identification of chemical structure by IR
spectroscopy. Identification of physical structure by X-ray, SEM, NMR.
SECTION
-B
Moisture absorption: Definitions of
humidity, moisture regain and moisture content. Relation between regain and
relative humidity. Effect of stress and temperature on regain. Heat of
sorption. Swelling of fibres. Quantitative theory of moisture
absorption.
Fibre
friction: Technological importance.
Measurement of friction. Effect of load and area of contact. Static and kinetic
friction.General theory of friction and application to fiber.
SECTION
-C
Tensile properties: Factors influencing results of
tensile experiment. Expressing results. Different experimental methods. Effect
of variability. Elastic recovery. Effect
of test conditions on recovery. Cyclic testing. Fibre fracture and fatigue. Time effect. Creep and stress relaxation.
Introduction to dynamic testing and fatigue. Concept of models. Kelvin and Maxwell
model. Bending and torsional
rigidity of fibre. Structural
effect on extension behaviour.
Dielectric properties: Definition and effect of different
parameters on dielectric properties.
Electric
resistance and effect of different factors on the electrical resistance of
fibres.
SECTION
-D
Static electricity: Introduction and significance.
Measurement of static electricity. Explanation of static phenomena.
Optical
properties:
Refractive index and birefringence. Birefringence and orientation of fiber.
Reflection and lustre.
Thermal properties: Structural changes on heating.
Thermal transitions. Concept Heat setting of fibres.
TEXT BOOKS
1.
Meredith R, “The Mechanical Properties of Textile
Fibres”, North Holland Publishing Co; Amsterdam (1959)
2. Morton W E and
Hearle J W S, “Physical Properties of Textile Fibres”, 1st reprint,
The Textile Institute, Manchester (1993)
REFERENCE BOOKS
1.
Gupta V B and Kothari V K, “Manufactured Fibre
Technology”, 1st Ed., Chapman and Hall, London (1997).
2.
Hearle J W S, “Polymers and their properties”, Vol. I,
John Wiley and Sons, NY (1982).
3.
Gedde U W, “Polymer Physics”, Chapman Hall, London
(1995).
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