| Summary: | 博士 === 國立臺北科技大學 === 工程學院工程科技博士班 === 105 === Polypropylene (PP) fibers with a sorbital derivative nucleating agent (SDN) and rare earth aluminates were prepared via melt compounding and melt-spinning. Non-isothermal crystallization kinetics and luminescence properties of PP and luminous PP fibers were studied by differential scanning calorimetry (DSC), polarized optical microscopy (POM), and decay of the afterglow test. The crystallization temperature determined by DSC increased with the addition of the nucleating agent during the cooling process from 200°C. The Jeziorny and Mo’s model successfully described the non-isothermal crystallization behavior of the PP and luminous PP fibers. The crystal grain size and morphology of the sample with the SDN was different from that without SDN. The luminous PP fabric having high initial brightness intensity, approximately 461mcd g-1m-2, can be prepared with addition of 10wt% of rare earth aluminates and 0.5% of SDN. Furthermore, a hyperbranched polymer (HBP-X3) containing siloxane chains was synthesized via polymerization of diepoxide with a primary amine in the presence of monoepoxide. Blends of polylactic acid (PLA) with various fractions of HBP-X3 were prepared via melt compounding using a brabender. Non-isothermal crystallization kinetics of the blends was studied by DSC. It was found that the cold crystallization temperature of the PLA with HBP-X3 was lower than neat PLA. The crystallization kinetics of the PLA blends was successful described by Jeziorny model and Mo’s model.
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