Abstract

AbstractThe variation of lattice spacings of poly(iminosebacoyl iminodecamethylene) (nylon‐10,10) with temperature was studied by wide‐angle X‐ray diffraction (WAXD) during both heating and cooling processes, which demonstrates a gradual and continuous transition with temperature. However, the crystal melts before the two peaks merge completely. Both WAXD and differential scanning calorimetry show that crystallization from molten sample results directly in the triclinic form. Additionally, this transition is thermodynamically reversible.Comparison of this transition with that of nylon‐6,6, suggests that no hydrogen‐bonded network is formed during or after the transition. We prefer to attribute this transition to asymmetrical thermal expansion in the nylon‐10,10 crystals rather than to a true first‐order phase transition.© 2001 Society of Chemical Industry

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