Polymer-ridge waveguide fabrication by gas-assisted UV embossing with a soft mold / F.-S. Cheng in INTERNATIONAL POLYMER PROCESSING, Vol. XXIII, N° 3 (07/2008)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIII, N° 3 (07/2008) . - p. 312-316 Titre : Polymer-ridge waveguide fabrication by gas-assisted UV embossing with a soft mold Type de document : texte imprimé Auteurs : F.-S. Cheng, Auteur ; S.-Y. Yang, Auteur ; P.-Y. Huang, Auteur Année de publication : 2008 Article en page(s) : p. 312-316 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : This paper reports a new process for the fabrication of polymer optical waveguides using gas-assisted UV embossing. A polydimethylsiloxane (PDMS) mold with a multimode waveguide array was made by casting a pre-polymer of PDMS against a plastic master of a waveguide array. The plastic master was prepared using gas-assisted hot embossing of polycarbonate (PC) film over a Si mold with the waveguide array. In this study, well-defined patterns with fine roughness for the multi-mode waveguides (125 µm × 80 µm) were successfully fabricated. The residual layer was thin and uniform. The replication quality, surface roughness and optical property of the replicated waveguides were measured and proved satisfactory. The average propagation loss of the waveguides was 0.88 dB/cm at a 1310 nm wavelength. The results indicate that the proposed method is likely to be a promising technique for the fabrication of optical waveguides. DOI : 10.3139/217.2138 En ligne : https://drive.google.com/file/d/12y69bV10YK0UxjIL9s2UguUTVyyFE81V/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2632 [article]

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Study on kneading and molding of PP/TiO2 nanocomposite / C. K. Huang in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 3 (07/2009)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 3 (07/2009) . - p. 267-271 Titre : Study on kneading and molding of PP/TiO2 nanocomposite Type de document : texte imprimé Auteurs : C. K. Huang, Auteur ; F.-S. Cheng, Auteur Année de publication : 2009 Article en page(s) : p. 267-271 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : This paper investigates the kneading and molding of PP (polypropylene) with nano-TiO2 (Titanium dioxide) powder having sizes in the range of 50 nm. It was found that quality feedstock with uniform nanopowder dispersion was achieved only when the kneading was performed for optimum time under optimum torque using a custom-made triple-screw kneader with a high shear stress. The torque and kneading time needed for PP composite with 40 wt.% nano-TiO2 is double that required for the one with 10 wt.%. Rheological and impact properties of composites with 10 wt.% and 40 wt.% filler loading were also analyzed. In addition, a very important result revealed that a simple micro-grating can be successfully used as a mold insert to replicate micro-features made with PP/nano-TiO2 feedstock using injection molding conducted under a high forming pressure and evacuation of the mold. DOI : 10.3139/217.2254 En ligne : https://drive.google.com/file/d/1DWWy4vOFMVs1E-g0RRra__FxWo_5t3MN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5930 [article]

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