Fill in the Blanks
Example of seed fibers is cotton and Kapok
A cross-section of NaOH swollen cotton fibers shows a ring in the secondary wall which is better known as Lumen.
The hollow Space in cotton fiber is known as Lumen while that in wool is called Medulla.
The sulfur-containing amino acids in wool are cysteine and methionine.
Stem fibers are also known as Bast Fibers
Linen is made up of individual cells named Ultimate
The monomers used in the production of PET are MEG and TDA
Acrylics that contain less than 85% of acrylonitrile by weight are termed.
Ziegler–Natta is the catalyst used during the polymerization of polypropylene.
Asbestos is a naturally occurring mineral fiber.
The dilute solution viscosity of a branched polymer is Higher than that of the corresponding linear polymer in the same solvent.
Anionic polymerization produces a Low molecular weight distribution in the polymer.
A monomer capable of forming a six-membered ring undergoes a Side reaction.
A cross-linked polymer has a high molecular weight.
A redox indicator is most suitable for Suspension or Aqueous dispersion Polymerization.
Benzylamine can act as a Stabilizer in polyethylene terephthalate manufacture.
The degree of crystallinity can be best determined by the X-ray Diffraction technique.
Besides melt spinning nylon 6 fiber may also be produced by the wet spinning method.
Differential thermal analysis can be used for obtaining Tg, Tc, Tm of a polymer.
Azoic colors can be prepared on the substrate.
Reactive dyes form a Covalent bond with the fiber.
Indigo is a Vat dye.
Pigments are applied along with an Emulsion.
Acrylic fibers are dyed with Cationic dyes.
Rapidogen colors are a mixture of a diazoamino base and a Sodium Naphthol.
A low-temperature catalyst for curing pigment colors is MgCl2
Steaming of printed polyester fabrics is carried out in a loop ager at 100-200oC.
Carbonization treatment is given to printed polyester/viscose rayon fabric to dissolve Cellulosic material.
True or False.
Cellulose acetate can be melt spun False
Wool dissolves in sulphuric acid False
Cotton behaves as a cross-linked polymer True
A copolymer has a lower melting temperature than that of the respective homopolymers. False
Variation in relative humidity of air has no effect on the tensile characteristics of the fiber. False
The displacement of an absorption band towards a longer wavelength is called redshift. True
The colors that are on the textile fabrics are due to subtractive color mixing. False
Optical density is the same as absorbance. False
The visible region is from 300nm to 700nm. False
The lightfastness is assessed with the help of a greyscale. False
A diazonium compound couples with phenol at m-position. False
Hydroxyl and amino groups do not influence the color and dyeing properties of azo dyes. False
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