Abstract
The surface induced crystallization of poly (ɛ-caprolactone) (PCL) on an ultra-high modulus polyethylene (PE) fibre was investigated using a new approach based on the induction timeti. This approach allows estimation of the free energy difference function Δσ as it appears in the theory of heterogeneous nucleation. The classical approach based on the rate of heterogeneous nucleationl is not applicable to transcrystallization because the nucleation density at the fibre surface cannot be measured. A relationship betweenl andti is proposed and a theoretical justification is presented. Good agreement between the two approaches is obtained for a verification case where bothl andti can be determined. A transcrystalline growth rate study yields an estimate of the parameter σσe for PCL of 680 erg2cm−4. The maximum growth rateg* is also obtained. The results obtained indicate the influence of certain parameters on the appearance of transcrystallinity. It is also shown how the interfacial morphology can be controlled by the knowledge of the variations of the induction time with temperature.
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