Rubber Technologist Interview Questions and Answers

The polymer present in Oil resistance Compound is Nitrile rubber (NBR).

• Nitrile rubber (NBR) is commonly used in Oil resistance Compounds due to its excellent resistance to oils, fuels, and chemicals.

• NBR is a synthetic rubber copolymer of acrylonitrile and butadiene.

• It is often used in automotive seals, gaskets, hoses, and O-rings where resistance to oil and fuel is required.

The Abrasion Compound is prepared by mixing various ingredients in specific proportions and processing them to achieve the desired properties.

• Mixing ingredients such as rubber, fillers, plasticizers, and curing agents in a specific ratio

• Processing the mixture through methods like milling, calendering, and extrusion

• Testing the compound for properties like abrasion resistance, tensile strength, and elongation at break

• Adjusting the formulation based on test results to meet desir...read more

Chemical testing in rubber involves analyzing the composition and properties of rubber materials to ensure quality and performance.

• Chemical testing helps determine the presence of specific chemicals in rubber compounds.

• It can also assess the degradation of rubber due to exposure to chemicals or environmental factors.

• Common chemical tests include Fourier transform infrared spectroscopy (FTIR), gas chromatography-mass spectrometry (GC-MS), and thermal analysis.

• Chemical testing ...read more

Costing of rubber compound involves calculating the total cost of raw materials, processing, and overhead expenses.

• Calculate the cost of raw materials used in the rubber compound.

• Consider the processing costs, including labor, energy, and equipment maintenance.

• Factor in overhead expenses such as rent, utilities, and administrative costs.

• Determine the total cost by adding up all the individual costs.

• Example: Cost of rubber compound = Cost of raw materials + Processing costs + ...read more