Attaining durable painted plastic components / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 5 (01/2005)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 5 (01/2005) . - p. 351-360 Titre : Attaining durable painted plastic components Type de document : texte imprimé Auteurs : Rose Ann Ryntz, Auteur Année de publication : 2005 Article en page(s) : p. 351-360 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété  mécanique  interface  Oléfine  polymère  Promoteur  adhérence  Etude  expérimentale  Durabilité  Résistance  rupture  Adhésivité  Relation  mise  en  oeuvre  propriété  Polymère  chlore  dérivé  halogéné  Couche  primaire  Traitement  surface  Prétraitement  Peinturage  Procédé  revêtement  Matériau  revêtu  Propène  Mélange  Elastomère  Caoutchouc  thermoplastique Index. décimale : 667.9 Revêtements et enduits Résumé : Adhesion to thermoplastic olefin (TPO) substrates, blends of polypropylene (PP) and an elastomer, is often difficult to attain due to the low surface energy, nonpolar nature of the surface. One often specifies, therefore, that the surface of the substrate be pretreated. Pretreatment methods can vary, from oxidation of the surface, e.g., plasma or flame, to diffusion and mechanical interlocking of an applied polymer with the surface. Mechanical interlocking with the nonpolar TPO surface can be achieved through the use of an adhesion promoter, namely a chlorinated poly(olefin) (CPO). The type of CPO utilized, in addition to the types of solvents and heat treatments utilized, can substantially influence the degree of adhesion/cohesion obtained within the CPO/TPO system. This article reviews the factors influencing the adhesion/cohesion of painted TPO substrates. Heat histories, TPO molding variations, CPO types, including solvent and resin variations, and topcoat (basecoat/clearcoat) chemistries are all found to influence the adhesion/cohesion of the painted TPO assembly (herein termed composite). Once adhesion of a topcoat system to the TPO substrate is achieved, however, the durability of that system to external forces is in question. External forces acting upon the painted composite, e.g., compressive stresses, tensile stresses, and single and/or multiple impact forces, can lead to devastating consequences. Chip or impact resistance and scratch or compressive/tensile (gouge) damage resistance can be affected by the choice of topcoat chemistries utilized. Topcoat frictional behavior, tensile strengths, and surface hardness were all determined to be influential factors in providing robust damage resistance to the painted composite. DOI : 10.1007/s11998-005-0003-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0003-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3725 [article]

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Bring back the steel ? The growth of plastics in automotive applications / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 1 (01/2006) . - p. 3-14 Titre : Bring back the steel ? The growth of plastics in automotive applications Type de document : texte imprimé Auteurs : Rose Ann Ryntz, Auteur Année de publication : 2006 Article en page(s) : p. 3-14 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Flow  agents'  'Dynamic  mechanical  properties'  Fluorescence  Hardness  'Scratch  resistance'  'UV  spectroscopy'  Photodegradation  Polyacrylics  Isocyanates  'Melamine-formaldehyde  resins'  Photostabilizers  Polyurethanes  Solventborne  'UV,  EB  radiation  cure'  Waterborne  'Service  life  prediction'  Weatherability  Automotive-OEM  High-solids  Latex  PARP Index. décimale : 667.9 Revêtements et enduits Résumé : The development of plastics has evolved from the use of natural materials to the use of chemically modified natural materials and, finally, to completely man-made molecules. Plastics continue to improve, to afford flexibility, high-impact, and strength. In automotive applications, plastics have increased in utilization to comprise approximately 10% of the total vehicle weight. They offer increased ductility, freedom from corrosion, and increased styling capability. Although plastics have had a remarkable impact on our culture, it is obvious that there is a price to be paid for their use. Plastics are almost too good, as they are durable when processed correctly, but easily damaged when utilized in the incorrect application. Plastics also degrade very slowly, making recycling mandatory. And finally, while plastics consume only 4% of the world's oil production (petroleum is the raw material that is chemically altered to form commercial plastics), their cost hinges on the cost of petroleum. As petroleum prices increase, so too will the cost of plastic. In 2004, the higher price of plastic forced many plastic manufacturers out of business, and forced many automotive suppliers to look into alternative replacements. With publications such as USA Today reporting that current oil reserves will only last 40 years, scientists continue to seek cheaper alternatives to plastic. This article summarizes the history of commercial plastic development, with a focus on utilization of the materials in automotive applications. Damage criteria of plastic components, namely scratch, oxidative degradation, and impact, are discussed in relation to coatings and processing robustness. Environmental regulations, particularly in relation to recycling mandates, are explained. And finally, trends in alternative material development, including bioplastics, films, ceramic coatings, and nano-composites, are formulated. DOI : 10.1007/s11998-006-0002-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0002-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3708 [article]

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Coating evolution in the automotive industry: An update / Rose Ann Ryntz in PAINTINDIA, Vol. L, N° 3 (suppl (03/2000)

[article]  inPAINTINDIA > Vol. L, N° 3 (suppl (03/2000) . - p. 75-84 Titre : Coating evolution in the automotive industry: An update Type de document : texte imprimé Auteurs : Rose Ann Ryntz, Auteur Année de publication : 2000 Article en page(s) : p. 75-84 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau  revêtement'  Peinture  Utilisation  'Industrie  automobile'; Index. décimale : 667.9 Revêtements et enduits Résumé : In the United States last year approximately $1.9 billion of paint were sold to the car and light truck industries, with another $225 million sold to the component manufacturers. Improvement in the perceived surface quality of decorated automotive components and an increased demand in environmental regulations has required a shift in paint technology over the past decade. In North America, the percentage of finishers applying low solids solventborne paint continues to decline. The percentage of finishers applying powder remained about the same as last year, although the percentage is expected to grow within the next two years. The percentage of finishers applying waterborne coatings declined slightly last year, although it is expected to increase modestly to just under 34% in 2 years. The estimated growth of paint technology in Europe also indicates a sharp decline in the use of low solids solventborne paint. High solids solventborne, reactive systems (to include two-component products), and powder are expected to see the largest increase in growth over the next two years. This paper attempts to explain the shift in paint technology utilized in the automotive industry brought on by increased environmental regulations and a more educated consumer. It also attempts to describe future needs in the industry as perceived through growing global commitment and external drivers in converging technologies. The future of automotive manufacturing processes may well lie in the same realm of that considered futuristic success in computer engineering. This paper will attempt to describe the convergence of technologies, e.g., the coming together of technologies that used to be separate. Through the assimilation, improvement, and generation of new technologies, the coating community, as a major supplier to the very large automotive industry, will continue to thrive, grow, and maintain its environmental stewardship in the global marketplace. Note de contenu : - PRODUCT DEVELOPMENT - COATING RESEARCH AND DEVELOPMENT - FUTURE TRENDS Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12678 [article]

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Correlating thermodynamic and mechanical adhesion phenomena for thermoplastic polyolefins / Daniel J. Burnett in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 2 (06/2007) . - p. 211-215 Titre : Correlating thermodynamic and mechanical adhesion phenomena for thermoplastic polyolefins Type de document : texte imprimé Auteurs : Daniel J. Burnett, Auteur ; Rose Ann Ryntz ; Frank Thielmann, Auteur Année de publication : 2007 Article en page(s) : p. 211-215 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Caoutchouc Interfaces (Sciences physiques) Polyoléfines Une polyoléfine, parfois appelée polyalcène, désigne un polymère aliphatique saturé, synthétique, issu de la polymérisation d'une oléfine (aussi appelée un alcène) telle l'éthylène et ses dérivés. La formule générale est -(CH2-CRR')n-, où R et R' peuvent être l'atome d'hydrogène (H) ou les radicaux alkyle apolaires CH3, CH2-CH3, CH2-CH(CH3)2. Il existe aussi des mousses isolantes souples faites à partir de polyoléfine (pour l'isolation thermique de tuyaux plastiques par exemple). PRESENTATION : Les polyoléfines forment la plus importante famille de matières plastiques, avec quatre représentants (PP, HDPE, LDPE, LLDPE) parmi les plastiques de grande consommation. La consommation mondiale de ces quatre polymères est évaluée à plus de 60 millions de tonnes en 20001. Seul un petit nombre de polyoléfines a atteint le niveau industriel : les polyoléfines thermoplastiques semi-cristallines : polyéthylène (PE), polypropylène (PP), polyméthylpentène (PMP), polybutène-1 (PB-1) ; les polyoléfines élastomères : polyisobutylène (PIB), éthylène-propylène (EPR ou EPM) et éthylène-propylène-diène monomère (EPDM). PROPRIETES : En raison de leur nature paraffinique, les polyoléfines sont hydrophobes et possèdent en général une grande inertie chimique (aux solvants, acides, bases, etc.). Ces matériaux ont donc une qualité alimentaire. Le collage est très difficile (la surface est particulièrement inerte, des traitements de surface spéciaux sont nécessaires). Cependant, ils sont sensibles à l'action des UV, et résistent très peu à l'inflammation car leur indice limite d'oxygène est faible (exemple : ILO ~ 17 pour le polyéthylène). Leur densité est très faible [0,83 (cas du PMP) < d < 0,95] : ils flottent dans l'eau. Ils sont opaques, sauf le PMP (transparent). Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Surfaces -- Analyse Thermoplastiques Une matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire. Index. décimale : 667.9 Revêtements et enduits Résumé : Polyolefins are used over a wide range of industries due to their low cost and adaptable mechanical properties. However, their low surface energy makes fabricating composites and applying coatings challenging. Therefore, various surface treatments have been utilized to enhance their adhesion properties. In this paper, the surface energies of various thermoplastic polyolefins (TPO) have been measured via Inverse Gas Chromatography (IGC). These surface energy values were correlated to mechanical adhesion testing of the painted polyolefins. The adhesive integrity of the painted TPO was determined by applying a comprehensive-shear load to the material. Higher surface energies measured by IGC lead to increased adhesion with the paint. The surface energies also correlate with TPO crystallinity, as determined by microhardness testing of the unpainted TPO. DOI : 10.1007/s11998-007-9017-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9017-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3664 [article]

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Degradation modes of crosslinked coatings exposed to photolytic environment / Tinh Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 1 (01/2013) . - p. 1-14 Titre : Degradation modes of crosslinked coatings exposed to photolytic environment Type de document : texte imprimé Auteurs : Tinh Nguyen, Auteur ; Xiaohong Gu, Auteur ; Mark R. VanLandingham, Auteur ; Eric Byrd, Auteur ; Rose Ann Ryntz, Auteur ; Jonathan W. Martin, Auteur Année de publication : 2013 Article en page(s) : p. 1-14 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fourier, Spectroscopie infrarouge à transformée de Microscopie à force atomique Photochimie Photodétérioration Polymères réticulés Revêtements -- Détérioration Revêtements -- Effets du rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : The objective of this study is to assess the degradation modes of crosslinked coatings exposed to photolytic environments. Three model crosslinked coatings were exposed in various ultraviolet environments. Atomic force microscopy and Fourier transform infrared spectroscopy were used in following nanoscale physical and chemical degradation during exposures. Results indicated that photodegradation of crosslinked coatings is a spatially localized (inhomogeneous) process in which nanometer-sized pits are initially formed; these pits deepen and enlarge with exposure. A conceptual model is proposed to explain the inhomogeneous degradation mode. The model proposes that nanosize “hydrophilic” domains are dispersed randomly with the highly crosslinked units. These hydrophilic domains, which are energetically preferred, comprise polar, unreacted and partially polymerized molecules, chromophores, and other additives. Photodegradation initiates at degradation-susceptible hydrophilic domains spreading to surrounding areas contiguous with the initiation site. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and sample preparation - exposures and apparatus - Degradation measurements - RESULTS AND DISCUSSION : Amine-cured epoxy - Acrylic urethane - Acrylic melamine - CONCEPTUAL MODEL FOR THE INHOMOGENEOUS DEGRADATION DOI : 10.1007/s11998-012-9455-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9455-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17467 [article]

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Measuring adhesion to poly(olefins) / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 921 (10/2001)

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Painting of plastics / Rose Ann Ryntz / Blue Bell [Etats-Unis] : Federation of societies for coatings technology (1994) 

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Real world performance of painted plastics components / Rose Ann Ryntz in COATINGS TECH, Vol. 2, N° 18 (07/2005)  

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Scratch resistance behavior of automotive plastic coatings / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 925 (02/2002)

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Scratch resistance behavior of model coating systems / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 904 (05/2000)

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Some complementary scratch resistance characterization methods / Lan Mi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)  

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Structure/property relationships in flexible alkoxysilane automotive coatings / Phillip V. Yaneff in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 933 (10/2002)

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Surface and interface characterization of chlorinated polyolefin coated thermoplastic polyolefin / Yuechun Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 5 (01/2005)  

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Understanding the effect of processing conditions on the scratch and mechanical behavior of automotive plastic coatings on TPO / Dottie Britz in COATINGS TECH, Vol. 3, N° 6 (06/2006)  

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Use of a scanning probe microscope to measure marring mechanisms and microhardness of crosslinked coatings / Weidian C. Shen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 873 (10/1997)

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Visco-elastic visco-plastic analysis of scratch resistance of organic coatings / Vincent Jardret in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 8 (10/2005)  

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