Saved Bookmarks
| 1. |
Write down the name of known polymer of polyesters category and also explain its preparation and uses. |
|
Answer» Solution :Dacron or terylene are the very KNOWN name of POLYESTERS. These are the polycondensation products of dicarboxylic acids and diols. Terylene or Dacron : Preparation : It is manufactured by HEATING a mixture of ethylene glycol and terephthalic acid at 420 to 460 K in the presence of zinc acetate- antimony trioxide catalyst as per the reaction by condensation polymerization.  PROPERTIES : Dacron fibre (terylene) is crease resistant and is used in blending with cotton and wool fibres. Uses : It is used as glass reinforcing materials in SAFETY helmets, etc. |
|