Question

Rubber made by valcanization is _____ material.

dirty


Hard


soft​

Answer 1

Answer:

rubber made by vulcanization is "hard"material

hope it helps you

Answer 2

Rubber made by valcanization is soft material.

Explanation:

• Sulphur is the material used to vulcanization of rubber.
• The following points are the reasons why rubber is vulcanised.
• At high temperature sulphur is soft and sticky.
• At low temperature it is brittle.
• So,sulphur is used at low-temperature range between 280 to 330 Kelvin.
• Elasticity of rubber is maintained at this temperature range.
• Oxygen and other oxidising agents are attacked, so, it is vulcanised.
• It has a low resistance to abrasion, low tensile strength and high water absorption capacity.
• Vulcanised rubber are reactive to organic solvents.
• That's why, natural rubber is vulcanised by heating it with about 3 to 5% sulphur at 373 to 415 Kelvin.

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