Controllable self-organization of polyphenylene oxide honeycomb microstructure / H. Chen in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 4 (08/2012)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 4 (08/2012) . - p. 486-492 Titre : Controllable self-organization of polyphenylene oxide honeycomb microstructure Type de document : texte imprimé Auteurs : H. Chen, Auteur ; X. Shang, Auteur ; D. Zhang, Auteur ; I. Hagiwara, Auteur Année de publication : 2012 Article en page(s) : p. 486-492 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Films plastiques Hydrophobie Microstructures Oxyde de polyphénylène Plastiques alvéolaires Structure en nid d'abeilles Systèmes auto-organisés Index. décimale : 668.9 Polymères Résumé : Polymer films with patterned microstructure have been widely applied in various industrial areas such as micro reactors, chemical sensors and micro-molded template etc. In this paper, a self-supporting polymer film with regular honeycomb microstructure is fabricated by self-organization via evaporation of polyphenylene oxide (PPO) solution in which carbon disulfide is used as solvent under humid ambience. Apart from investigation of self-organization mechanism of PPO honeycomb including nucleation, growth of water droplets condensed upon liquid supporting substrate, the quantitative relationship between honeycomb microstructure and ambient conditions is built through tremendous self-organization experiments. The controllable formation of honeycomb microstructure with desirable hydrophobicity was achieved by use of built quantitative relationship. Moreover, hydrophobicity mathematical model of self-organized honeycomb thin film was proposed, and its validation was experimentally verified. Note de contenu : - PPO SELF-ASSEMBLY EXPERIMENT - RESULTS AND DISCUSSION : Stability of the self-organized film - Influence of ambient humidity on self-organized film - Influence of solution concentration on the self-organized film - Controllability of honeycomb microstructure formation DOI : 10.3139/217.2606 En ligne : https://drive.google.com/file/d/1pHrueSKIlee_MtkTq9VWdrzJ_1bpmlmE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15772 [article]

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Utilizing processing parameters for evaluating polymer viscosity during plastication in injection molding / R. Dubay in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 3 (07/2009)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 3 (07/2009) . - p. 298-305 Titre : Utilizing processing parameters for evaluating polymer viscosity during plastication in injection molding Type de document : texte imprimé Auteurs : R. Dubay, Auteur ; D. Zhang, Auteur ; J. M. Hernandez Année de publication : 2009 Article en page(s) : p. 298-305 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : This paper investigates the viscosity behavior of melt polymer during the plastication stage in an injection molding machine (IMM). The objective of this paper is to develop theoretical viscosity-based models for evaluating and predicting the bulk viscosity of the melt polymer near the tip of the screw during the plastication stage. The uniqueness of these models is that they include the effects of material properties and machine processing parameters, such as screw rotational speed, hydraulic back pressure, barrel pressure drop, melt pressure and melt temperature. Several open loop tests were conducted on an industrial IMM in order to quantify process parameter effects on the plastication cycle. The derived model was used to predict bulk viscosity using the open loop tests data. The viscosity-based models in this work will be used for developing future optimal controllers for controlling the polymer viscosity during the plastication stage of the injection molding cycle. DOI : 10.3139/217.2267 En ligne : https://drive.google.com/file/d/12n9VM85YSfo78XqZgv6i5U4pLwAVf127/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5934 [article]

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