Plastics Testing-II — Winter 2024

Define: Value, Hue and Chroma.

Explain the theory of Volume resistivity.

Explain test procedure to determine Dilute Solution Viscosity of Polymers.

Explain coefficient of linear thermal expansion test.

Give ASTM standards for: ESCR, HDT, Di-electric Strength and Luminous Transmittance.

Explain GPC technique with diagram. Give its applications.

Explain water vapour transmission rate (WVTR) to determine barrier properties.

Write short note on Brittleness temperature of plastics.

Write short note on dielectric constant and dissipation factor.

Explain Dynamic Mechanical Analysis (DMA) Test for polymers.

List the typical requirements of an insulator and give any four electrical applications of Plastic materials.

Explain Oxygen transmission rate (OTR) with its instrumentation and units.

Define Luminous transmittance. Explain test procedure to determine Luminous transmittance and Haze.

Differentiate between Dielectric constant and Dissipation factor.

Give types of accelerated weathering tests and explain any one in brief.

Give significance of Environmental stress cracking resistance (ESCR) and Explain test procedure to determine ESCR with neat diagram.

Explain solvent stress cracking resistance.

Explain flammability test for self-supporting plastics in Horizontal position with nest diagram.

Discuss test procedure to determine Oxygen index and explain factors affecting test results.

Draw a typical DSC thermogram and list the applications of DSC.

Explain Luminous Transmittance and Haze.

Explain TGA technique for polymers.

DSC and TGA are used to measure which properties of plastic materials?

Explain TMA technique and its use.

Give importance of Non-destructive Testing (NDT) and Explain Ultrasonic method using Pulse-Echo Technique.