ABSTRACT:The preparation and characterization of high-molecular weight diphenyl oxide-and diphenyl sulfide-novolacs are described. The polymerization of diphenyl oxide with 2 equivalence of formaldehyde proceeded to give the corresponding polymer (2) (M n : 160,000, M w /M n : 29.1) in good yield. Further, an ultra high-molecular weight fraction (M w > 1,000,000) was observed in the GPC trace of 2. The developed polymers can be considered as a new class of aromatic polymers that exhibit both novolac-like and engineering plastic properties and are thus promising compounds for material-engineering applications.
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