I need to know the pH of either isoprene or SBR ?
2007-01-23 01:41:39 · 2 answers · asked by kbx_4 1 in Science & Mathematics ➔ Chemistry
Poly(isoprene) and SBR (styrene-butadiene rubber) are manufactured by a process called "emulsion polymerization". The product is a latex (rubber particles in a water suspension) which has high pH, usually 11 or higher. This high pH has nothing to do with the polymers themselves, as hcbiochem points out, rather it has to do with the stabilizers used to keep the latex as a liquid. If the pH is lowered, the polymer crashes out. The resultant rubber is then not pH active.
I brought this up since you didn't specify the form of the polymers.
2007-01-23 03:56:06 · answer #1 · answered by Glenguin 7 · 0⤊ 0⤋
They should both be neutral because they don't have any ionizable groups to affect the pH.
2007-01-23 09:55:22 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋