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Melting, crystallization and optical behaviors of poly (ethylene terephthalate)-silica/polystyrene nanocomposite films
來源:柯揚船教授個人網站 發布日期:2010-05-15
作者:Tianbin Wu, Yangchuan Ke
關鍵字:Annealing,Double melting peaks, Nucleation,Poly (ethylene terephthalate),Scanning electron microscopy
論文來源:期刊
具體來源:Thin Solid Films
發表時間:2007年

Poly (ethylene terephthalate) (PET)-silica (SiO2)/polystyrene (PS) nanocomposite films were prepared by melting PET with the core-shell SiO2/PS nanoparticles. Differential scanning calorimetry (DSC) results showed that the crystallization temperature of PET-SiO2/PS nanocomposite films with 2 wt.% PS-encapsulated SiO2 nanoparticles reached 205.1 °C, 11.6 °C higher than that of PET. For crystallized PET-SiO2/PS nanocomposite films, double melting peaks appeared in DSC curves similar to PET. Scanning electron microscopy revealed a netlike fibre morphology for the amorphous PET-SiO2/PS nanocomposite films with 2 wt.% PS-encapsulated SiO2 nanoparticles. The light transmittance of these amorphous PET-SiO2/PS nanocomposite films reached 87.9%, compared to 84.2% for PET. With the increase of annealing temperature from 110 to 150 °C, the transmittance of PET-SiO2/PS nanocomposite films decreased slowly from 69.9 to 46.9%, while their haziness increased slightly from 45.8 to 48.2%. All these phenomena are suggested to result from the strongly heterogeneous nucleation of PS-encapsulated SiO2 nanoparticles in PET.

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