Thermal Properties of Polymers In the amorphous region of the polymer, at lower temperature, the molecules of the polymer are in, say, frozen state, where the molecules can vibrate slightly but are not able to move significantly. This state is referred as the glassy state. In this state, the polymer is brittle, hard and rigid […]
Textile Physics-1
Mechanical Properties of Polymers
Mechanical Properties of Polymers Mechanical Properties: It is of great importance to be familiar with some basic mechanical properties of the material before its application in any field, such as how much it can be stretched, how much it can be bent, how hard or soft it is, how it behaves on the application of […]
Thermal Properties of Polymers
Thermal Properties of Polymers : Thermal property: The property which is shown by a textile fiber when it is subjected to heating is called thermal property. Thermal property is included: Thermal conductivity Melting transition temperature Glass transition temperature Heat setting Thermal expansion Heat of wetting or heat absorption Flammability Thermal conductivity: Thermal conductivity is the […]
Frictional Properties
Frictional Properties Friction is a vital important factor in the application of fibrous materials to engineering. Frictional property is the surface property of the fibers when two solid surfaces slide against each other. Due to fiber friction, static charge and heat energy is produced. Friction: Friction is the force of two surfaces in contact, or […]
Torsional Properties of Textile Materials
Torsional Properties of Textile Materials Torsional Property: Fibers are twisted to form yarns, while are made into textile fabrics or ropes. The torsional properties determine how fibers respond while being twisted. Torsional Rigidity: The torsional rigidity is the resistance of a fiber to twisting. In the Hookean region of small stains, the torsional rigidity defined […]
Flexural Properties of Textile Materials
Flexural Properties of Textile Materials The behavior which shows by textile material during bending is called flexural (bending) property. The importance of Flexural properties is required when we wear cloth. Significance of Bending and Twisting: ❶ The bending and twisting of fibers influence the behavior of bulked yarn and the drape and handle of fabrics. […]
Reflection and Luster
When light falls on the fiber, part of light is reflected. The luster of a single fiber is determined by the total visual appearance of these reflections from the fiber surface. It is directly proportional to the amount of light reflected by a fiber. Silk fibers has a high luster and cotton has low luster.
Swelling of fibre and Types of swelling
Dimensionally changes due to absorbing water or moisture by any fiber is known as swelling. When fiber absorbs water they change dimensionally. Swelling occurs in transversely (width wise) and axially (Lengthwise). It may be expressed in terms of the increase in diameter, area, length or volume.
Birefringence | Fiber Birefringence
The difference between the refractive index indices of the fiber in a direction at parallel to the fiber axis and in a direction at right angles to the fiber axis is called birefringence of that fiber. Birefringence is responsible for the phenomenon of double reflection.
Optical Properties of Textile Fibers
Part 1: Optical Properties of Textile Fibers Part 2: Birefringence | Fiber Birefringence Part 3: Reflection and Luster Optical Properties of Textile Fibers Optical Properties When light falls on a fiber, it may be partly transmitted, absorbed or reflected, depending on the structure of the light. The transmission, reflection and absorption of light determine the […]
