POLYMER TECHNOLOGY QUIZ

All of these

More abrasion resistant properties

Higher hardness

Lower melting point

Abrasion resistance

Adhesion to rubber

Hardness

Thermal stability

Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents

Greater the degree of cross-linking in the polymer, lesser is its solubility

Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent

High molecul ar weight polymers on dissolving gives solution of very low viscosity

Poorer resistance

Poor tensile strength

Greater amount of heat build up heavy loading

All of these

Linear low density

Cross-linked

High density

Low density

As grease & lubricant

As room temperature adhesive

Hydraulic fluid for heat transfer

Resin for lamination

More brittle

Easily reshaped & reused

Soluble in all organic solvents

Formed by addition polymerisation only

Amino

Phenolic

Epoxy

Urea formaldehyde

Teflon

Bakelite

PVC

Polythene

10⁻¹ to 10⁻²

10⁻² to 10⁻⁵

10⁻⁸ to 10⁻¹⁰

10⁻⁴ to 10⁻⁷