The fibre that leaves a hard residue upon burning is ________
Answers
Answer:
The fiber that leaves hard residue on burning is Acrylic fibres, polyester and polythene
Explanation:
Acrylic fibers are comprised of a polymer and are synthetic, artificial fibers. Polyacrylonitrile has a molecular weight of 100000, which is equivalent to around 1900 monomer units. Sweaters and tracksuits are made from it. It's also utilized for boot and glove linings. Because acrylic is a synthetic material, it burns, melts, and shrinks all at the same time. Acrylic ignites and burns quickly, producing a fierce, spitting flame and black smoke, as well as residue.
Polyester is a synthetic fiber that is made from coal, petroleum, water, and air. Polyester is made up of repeating units of a chemical called esters. Polyester keeps its crispness and form. Polyester, as synthetic fiber, burns, melts and shrinks simultaneously. When burned, it also leaves a residue.
Polythene is the most often used plastic nowadays. It's a man-made, linear, homopolymer that's mostly utilized in packaging. Polythene is a synthetic fiber that burns, melts, and shrinks all at once. When polythene is burned, hazardous and dangerous gases such as dioxin and furans are released. Polythene is a slow-burning material that leaves a residue.