Question

Based on matching Hildebrand Solubility Parameters (δ) as closely as possible (keep |δ solvent -δ polymer| <= 2), suggest 2 “good” solvents for each of the following polymers and 1 “poor” solvent for each. Report  values used for each polymer/solvent combination. Do not select water as a “poor” solvent.

Poly(vinyl alcohol)

 Poly(methyl methacrylate)  Poly(vinyl chloride)  Poly(acrylonitrile)  Poly(dimethyl siloxane)  Poly(ethylene oxide)  Poly(ethylene)  Poly(styrene)  Nylon(6,6) Poly(tetrafluoroethylene)

Answer 1

Poly(methyl methacrylate)    2

Poly(vinyl chloride)              1

Poly(acrylonitrile)                 1

Poly(dimethyl siloxane)       1

Poly(ethylene oxide)           2

Poly(ethylene)                    1

Poly(styrene)                     1

Nylon(6,6)                         1

Poly(tetrafluoroethylene)     2