Polybutylene rhymes with:
acetylene, polyacetylene, acetylene, aniline, ethylene, evaleen, gasoline, magdalene, maybelline, mescaline, naphthalene, opaline, polyacetylene, polyethylene, polypropylene, tourmaline, valvoline, vaseline
acetylene, polyacetylene, acetylene, aniline, ethylene, evaleen, gasoline, magdalene, maybelline, mescaline, naphthalene, opaline, polyacetylene, polyethylene, polypropylene, tourmaline, valvoline, vaseline