... poly vinyl alcohol CAS: 9002-89-5 IntroductionThe Polyvinyl Alcohol is made from ... 17-99F(H), 17-99 (L), 17-99(H), 18-99(L), 18-99(H), 19-99(L), 22-99(L), 19-88, ... is (C2 H4 O)n-(C2 H6O)m, of which "n + m" is the average degree of polymerization ... under the same condition after about 30 minutes.5. It is natural to blister when PVA is ... .17.00.822-99L99.251562.17.00.82499L≥99.2>562.17.00.8178886.0~89.020 ...