Is Polyiso foam board a good option for sound proofing interior walls?

We are in zone 4a.Is polyiso a good soundproofing material between interior rooms?I have plenty of 1-1/2 trecycled polyiso on hand; and, I am getting ready to hang drywall.The foam… We are in zone 4a.Is polyiso a good soundproofing material between interior rooms?I have plenty of 1-1/2 trecycled polyiso on hand; and, I am getting ready to hang drywall.The foam…Read MoreGreenBuildingAdvisor