Oxalic Acid → 4-Ethynylphenol

Participants

Reaction Conditions

Reaction Steps

409.8 g of a mixture consisting of 21.4% of p-vinylphenol, 59.8% of p-ethylphenol, 1.5% of phenol, 7.7% of p-cresol and 9.6% of water was introduced, over 30 minutes, into a rotary evaporator heated at 180° C. under a vacuum of 6 mmHg, and vacuum flash distillation was conducted. 364.2 g of a distillate was obtained and its composition was 21.3% of p-vinylphenol, 61.6% of p-ethylphenol, 1.5% of phenol, 7.8% of p-cresol and 7.8% of water. 132.4 g of this p-vinylphenol fraction was mixed, without being dehydrated, with 0.12 ml of a 0.5 M aqueous oxalic acid solution. The -resulting mixture was polymerized at 45° C. for 6 hours. The reaction mixture was treated in the same manner as in Example 1 to obtain 26.2 of a poly(p-vinylphenol). The polymer had a Mw of 10,470, Mn of 7,180, a light transmittance at 248 nm, of 70.5% and glass transition temperature of 173° C.

Provenance & Evidence