Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are__________________?
Correct answer: A. 5°C and 1 kgf/cm2
- A. 5°C and 1 kgf/cm2
- B. - 20°C and 1 kgf/cm2
- C. 0°C and 1 kgf/cm2
- D. 0°C and 3 kgf/cm2
Explanation
Cold SBR is made by low-temperature emulsion polymerisation, commonly maintained near 5°C with a pressure of about 1 kgf/cm². The lower temperature helps control the polymer structure and reaction rate.
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