Abstract
Study of the system poly(ethylene oxide) ( M w = 11,500 )-n- decane by gas-solid chromatography leads to two main conclusions: adsorption of the probe at the various interfaces is never negligible, in spite of the lack of any strong specific interaction between the alkane and the polyether. Reliable values of the degree of crystallinity may be however derived from measurements, taking into account these adsorption phenomena. The sharp increases of the specific retention volumes ( V g 0) observed at well defined temperatures (about 42.3 and 51.4°C) are directly related to the well known chain unfolding ν4 → 3 and ν3 → 2 in the crystalline lamellae.
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