Related Questions

What is the nature of the fluoro polymer polytetrafluoroethylene, regarding its crystallinity?
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
Polymer A, also available as copolymer with trifluoroethylene, is a crystalline polymer with a melting point greater than 160 ᵒC and is used in coatings and insulation materials. What is the name of polymer A?
A glass reinforced polymer composite comprises of 35 volume % glass fiber and 65 volume % of polymer resin. The elastic moduli of glass and polymer resin are respectively 70 GPa and 3 GPa. The elastic modulus of the composite (in GPa) under iso-strain state is
A large tank of height h is half-filled with a liquid of density ρ and other half-filled with a liquid of density 4ρ. A similar tank is half-filled with a liquid of density 2ρ and other-half filled with another liquid of density 3ρ as shown. What will be the ratio of the instantaneous velocities of discharge through a small opening at the base of the tanks? (assume that the diameter of the opening is negligible compared to the height of the liquid column in either of the tanks)
Determine the density specific impulse (Id) if the specific impulse is 315 s and the average density of the propellants is 840 kg/m3. Take the reference density to be the maximum density of water.
Which of the following is false about the properties of polytetrafluoroethylene?
Which of the following form of polytetrafluoroethylene can be used for casting films?
Which of the following is untrue about Polytetrafluoroethylene?
In 1938 which American chemist accidentally discovered polytetrafluoroethylene?