Abstract
AbstractConditions have been found for the etching of poly(ethylene terephthalate) with water so that the crystalline portions alone remain. Initial sample and hydrolysis products are analyzed by extraction of low molecular weight products; density, viscosity molecular weight, and endgroup determination; heating‐rate‐dependent thermal analysis; low‐angle and wide‐angle x‐ray analysis; and electron microscopy. On hydrolysis of a 67% crystalline polymer at 180°C for about 300 min, almost fully crystalline extended‐chain oligomers can be obtained with about 65% yield. The morphology of melt‐crystallized poly(ethylene terephthalate) and the melting behavior of oligomer lamellae are discussed.
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