Rubber Compounding Materials — Summer 2025

Summarize the role of fatty acids in organic synthesis

Differentiate between linear and branched isomers of alkanes.

Justify the advantages and disadvantages of using resorcinol and phenol in high- performance rubber applications and draw its structure.

Discuss the physical & chemical properties of precipitate Silica.

Compare the role of aluminum compounds and magnesium compounds as fillers in rubber formulation.

Apply your knowledge to predict which sulphur allotrops widely used in rubber industry and justify with proper example.

Demonstrate the manufacturing process of silica and explain how it is used to improve rubber performance.

Define the term "synergism" in the context of rubber compounding.

Explain the classification of rubber additives based on their functions.

Investigate the different types of bloom occurs in rubber compound in detail and write the reason of bloom in each.

Define the given terms: (i) Peptizer (ii) Retarder (iii) Compounding

Interpret the concept of recurring theories in rubber additive interactions.

Analyze the possible causes of impurity in a zinc oxide production plant and identify process steps that may contribute to quality loss.

Apply your knowledge to select suitable compounding aids for a rubber product that requires high flexibility and low temperature resistance.

Distinguish between factices and plasticizers in terms of their effects on rubber properties.

Show the chemical reaction of autoxidation of hydrocarbon polymers and write the approaches to minimize damage due to oxidation.

Suggest the name of peptizer used for natural rubber and chloroprene rubber with its minimum operative temperature and dosage.

Describe the mechanism of action of blowing agents in foam rubber.

Show the chemical reaction of chain breaking antioxidants of polymer and discuss the amine antioxidants in detail. Page 1 of

Interpret the classification system of carbon black grades as per ASTM N-series.

Compare the effects of different carbon black structures on the hardness and tensile strength of rubber.

Your company receives an order of 8 Lakh piece of hollow rubber O-ring to be supplied annually to a Car manufacturing company. The weight of a Rubber O-ring is 30 gram. Calculate (i) Specific gravity of compound (ii) Cost of one O-Ring.(iii) Design number of cavities (iv) Convert PHR to Kg and Prepare the 40kg Batch

write the important properties of carbon black.

Distinguish between channel black and furnace black in terms of production, properties, and application.

Develop the formulation for Red color Rubber ball which have rebound resilience (70%), low specific gravity, low compound cost and ash content should not be higher than 20%. Page 2 of