Mechanical properties of polypropylene-acrylic blend nonwovens reinforced composites / Pooja Katkar in CHEMICAL FIBERS INTERNATIONAL, Vol. 68, N° 4 (12/2018)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 68, N° 4 (12/2018) . - p. 188-190 Titre : Mechanical properties of polypropylene-acrylic blend nonwovens reinforced composites Type de document : texte imprimé Auteurs : Pooja Katkar, Auteur ; P. V. Kadole, Auteur ; Aniket Bhute, Auteur ; Parag Bali, Auteur Année de publication : 2018 Article en page(s) : p. 188-190 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Composites à fibres Composites à fibres -- Propriétés mécaniques Copolymère vinyle ester Dureté (matériaux) Epoxydes Essais dynamiques Nontissés Polyacryliques Polyesters Polypropylène Index. décimale : 677.4 Textiles artificiels Résumé : With huge range of textile structures such as short fiber, filament woven fabrics, knitted fabrics, braids, nonwovens, etc., they offer an enormous potential for development of varieties of composites, since these textile reinforcements have their own characteristic features which are translated into the composite. This is a driving force for growing interest from both the academic community and from industry in this area. In this study, 9 different needlepunched nonwovens reinforced composite samples were produced in varying reinforced material and resin with 3 levels each. Reinforcement was varied in terms of weigth per unit area of reinforced nonwovens with 3 levels viz. 300, 400 and 500 g/m², and resin was varied in terms of its type with 3 levels, viz.polyester, vinyl ester and epoxy. Composite samples were tested for mechanical properties. Note de contenu : - Hardness - Tensile strength and elongation - Flexural strength and elongation - Machinability - Fig. 1 : Hardness of composites - Fig. 2 : Tensile strength of composites - Fig. 3 : Tensile extension of composites - Fig. 4 : Flexural strength of composites - Fig. 5 : Flexural elongation of composites - Fig. 6 : Drilling - power requirement En ligne : https://drive.google.com/file/d/112Ky7K5TnFdpTtP9RdXYfYZvq-zLaZ82/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31361 [article]

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Mechanical properties of polypropylene-acrylic blend nonwovens reinforced composites / Pooja Katkar in CHEMICAL FIBERS INTERNATIONAL, (10/2019)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > (10/2019) . - p. 84-83 Titre : Mechanical properties of polypropylene-acrylic blend nonwovens reinforced composites Type de document : texte imprimé Auteurs : Pooja Katkar, Auteur ; P. V. Kadole, Auteur ; Aniket Bhute, Auteur ; Parag Bali, Auteur Année de publication : 2019 Article en page(s) : p. 84-83 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Composites à fibres Composites à fibres -- Propriétés mécaniques Copolymère vinyle ester Dureté (matériaux) Epoxydes Essais dynamiques Nontissés Polyacryliques Polyesters Polypropylène Index. décimale : 677.4 Textiles artificiels Résumé : With huge range of textile structures such as short fiber, filament woven fabrics, knitted fabrics, braids, nonwovens, etc., they offer an enormous potential for development of varieties of composites, since these textile reinforcements have their own characteristic features which are translated into the composite. This is a driving force for growing interest from both the academic community and from industry in this area. In this study, 9 different needlepunched nonwovens reinforced composite samples were produced in varying reinforced material and resin with 3 levels each. Reinforcement was varied in terms of weigth per unit area of reinforced nonwovens with 3 levels viz. 300, 400 and 500 g/m², and resin was varied in terms of its type with 3 levels, viz.polyester, vinyl ester and epoxy. Composite samples were tested for mechanical properties. Note de contenu : - Hardness - Tensile strength and elongation - Flexural strength and elongation - Machinability - Fig. 1 : Hardness of composites - Fig. 2 : Tensile strength of composites - Fig. 3 : Tensile extension of composites - Fig. 4 : Flexural strength of composites - Fig. 5 : Flexural elongation of composites - Fig. 6 : Drilling - power requirement En ligne : https://drive.google.com/file/d/1ljRtEO7bwvXGSihV-npLKNsJUvylQvu4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33100 [article]

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Stress relaxation studies in polyester filaments / Suhas Digmabar Asagekar in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 4 (12/2021)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 71, N° 4 (12/2021) . - p. 176-178 Titre : Stress relaxation studies in polyester filaments Type de document : texte imprimé Auteurs : Suhas Digmabar Asagekar, Auteur ; Pooja Katkar, Auteur Année de publication : 2021 Article en page(s) : p. 176-178 Langues : Anglais (eng) Catégories : Caractérisation Etirage (textile) 1. Procédé par lequel on diminue ou augmente la masse surfacique d'une nappe, ou la masse linéique d'un ruban ou d'une mèche. 2. Etirage à chaud ou à froid des filaments continus dans le but d'orienter la structure cristalline des fibres pour en améliorer la ténacité. Fibres polyesters Fibres textiles -- Propriétés mécaniques Fil partiellement orienté Filaments Fibre de longueur infinie ou extrême comme celle qu'on trouve dans la soie à l'état naturel. Les fibres manufacturées sont extrudées en filaments qui sont transformés en fils continus, en fibres courtes ou en câbles. Fixation (chimie) Relaxation des contraintes Traction (mécanique) Index. décimale : 677.47 Non cellulosiques : Nylon, acryliques, polyesters, vinyles Résumé : The stress relaxation characteristic of PET filament yarn was studied. The partially oriented polyester filament yarn (PET POY) was subjected to draw ratios viz. 1.4, 1.6 and 1.8 and then was heat set at temperatures 140, 160 and 180°C. It was observed that the relaxation values were reduced with increase in draw ratios. It was also observed that the relaxation values were decreased with increase in heat setting temperature. The spring constants and relaxation constants were calculated by assuming 3 element Zener model. The calculated values of spring constants were found to increase with increase in draw ratio. The relaxation constants were found to vary from 1.99-5.38 seconds for all the cases. The lovv values of relaxation constants indicate that for all cases the amorphous regions are more mobile which leads to speedy rearrangement of molecules. Note de contenu : - Material - Methods : The drawing and heat setting - Characterization of filaments - Theory - Results and discussion : Linear density - Tensile properties of filaments - Stress relaxation - Constants of model - Table 1 : Linear density values in denier units - Table 2 : Tensile properties of PET filament yarns - Table Stress relaxation (%) of heat set PET filaments En ligne : https://drive.google.com/file/d/1apIXYpbwI_pYLm4qA9duTb-Uv3kWiN7h/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36959 [article]

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