| abstract |
A PROCESS IS PROVIDED IN WHICH POLYPHENYLENE OXIDE POLYMER ARE READILY PREPARED IN HIGH YIELDS BY OXIDATIVE POLYMERIZATION OF PHENOLS WITH OXYGEN IN THE PRESENCE OF A NOVEL TERNARY CATALYST SYSTEM COMPOSED OF A MANGANESE COMPOUND, A PRIMARY AMINE, AND AN ALCOHOL. COMPARED WITH POLYMERS OBTAINED WITH KNOWN CATALYSTS, THE PRESENT POLYMER HAS NARROWER MOLECULAR WEIGHT DISTRIBUTION AND IS THERMALLY MORE STABLE AND MORE RESISTANT TO OXIDATION SO THAT NO SPECIAL STABILIZING TREATMENT IS NECESSARY. THE POLYMER SHOWS IMPROVEMENT IS CREEP RESISTANCE, DIMENSIONAL STABILITY, ENVIROMENTAL STRESS CRACKING, ECT. |