High Performance Polymers, 2nd Edition

5: POLY(PHENYLENE SULFIDE) 147

5.10 Environmental Impact

and Recycling

During the production of PPS, waste material is

obtained as a byproduct. This waste material may con-

sist of [19]:

• Linear and cyclic oligomers,

• Byproducts in polymerization,

• Unreacted reactants and polymerization modi-

fiers,

• Fine particle sized materials, and

• Polymer, which is not within the specifications

for the desired product.

A portion of the waste material resulting from the

manufacture of PAS polymer can be continuously

reused in subsequent polymerization processes, thus

avoiding the necessity of disposing of at least a por-

tion of such waste material [19].

References

[1] Shaw JE. Process for producing organic

polysulfide compounds. US patent 6187 960,

assigned to Phillips ...