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zhangrobber至尊木蟲 (正式寫手)
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[交流]
重金求助，涂料相關(guān)，900字漢譯英
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A 涂層對底材的保護在很大程度上受涂層和底材之間界面性質(zhì)的影響，因此對涂層/底材界面做深入研究，尋找并建立數(shù)學(xué)模型來反應(yīng)涂層和底材的作用關(guān)系，快速預(yù)測涂層和底材之間的附著力，對涂料配方設(shè)計和改進(jìn)、提高涂層對底材的保護能力具有很強的理論指導(dǎo)意義和實際應(yīng)用價值。 B 本文首先從涂料與底材間的潤濕關(guān)系入手，對液體涂料涂覆中的沾濕、浸濕和鋪展過程分別建立熱力學(xué)模型，討論了涂料表面吉布斯能、底材表面吉布斯能以及底材表面粗糙程度等因素對潤濕效果的影響，證明了底材的可潤濕性和潤濕程度與底材表面吉布斯能、粗糙程度以及涂料液體表面吉布斯能有密切關(guān)系。推導(dǎo)出底材吉布斯能的增加有利于涂料在底材表面的潤濕過程的進(jìn)行。當(dāng)?shù)撞谋砻婕妓鼓艽笥谕苛弦后w的表面能時，沾濕、浸濕能自發(fā)的進(jìn)行，并且隨著底材表面粗糙程度的增加，此兩種潤濕程度加深；而在此條件下，鋪展過程不一定能自發(fā)的進(jìn)行。 C 本文進(jìn)一步對影響涂層與底材間附著力的因素進(jìn)行了研究，根據(jù)建立的潤濕熱力學(xué)模型，找到了提高涂層與金屬底材、塑料底材附著力的方法：- D 以聚氨酯涂層與金屬底材的附著為例，著重討論了底材粗糙度、底材預(yù)處理，液體涂料極性官能團數(shù)目(DMPA的摻入量)對附著力的影響。實驗結(jié)果表明：對金屬底材表面預(yù)處理(打磨、除銹、脫脂、磷化、噴砂)、增加涂料配方中極性官能團的數(shù)目、控制樹脂軟硬段之間的比例、保持涂料一定的黏度對提高涂層與底材附著力具有明顯的作用。 E 以聚丙烯塑料底材為例，重點討論了提高塑料用涂料對塑料底材附著力的方法，分別從聚丙烯塑料的表面前處理(機械打磨，化學(xué)氧化)、樹脂以及溶劑的選擇等方面入手，通過實驗得出以下結(jié)論：對聚丙烯塑料進(jìn)行表面前處理特別是化學(xué)氧化能夠有效的提高其表面吉布斯能，讓涂料更容易潤濕底材；底材粗糙度的增加也能有效增加潤濕程度，但當(dāng)粗糙度增大到一定數(shù)值時，會影響涂層對底材的附著力；由于聚丙烯塑料的特性，選擇與其結(jié)構(gòu)類似的氯化聚丙烯樹脂時，附著性能表現(xiàn)良好；采用改性的氯化聚丙烯或氯含量在25%的等規(guī)氯化聚丙烯作為塑料底漆或者附著力促進(jìn)劑時，涂層與底材間的附著力更佳。對聚丙烯塑料制品來說，由于其結(jié)晶度高、耐溶劑性好等特點，使得在溶劑的選擇上也具有一定的難度，本文選取的一組混合有機溶劑能有效提高涂層與聚丙烯塑料底材間的附著力。 [ Last edited by zhangrobber on 2010-11-5 at 20:13 ] |
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古可ぷ
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zhangrobber(金幣+300, 翻譯EPI+1):辛苦了！謝謝！~~ 2010-11-06 22:09:41
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A、The nature of the interface between coating and substrate has a great effect on the protection which provide by coating. So further study of coating / substrate interface is performed. We find and construct mathematical models to show the relationship between coatings and substrate and the models can quickly predict the adhesion between the coating and substrate. It has a strong theoretical significance and practical value on design and improvements of the coating formulation and enhance the protection coating on the substrate. B、This article is based on wetting relationship between coating and substrate. We established thermodynamic models of the wetting rate and spreading in the process of painting of liquid paint. Factors which have effect on the wet result such as the paint surface Gibbs energy, the substrate surface Gibbs energy as well as substrate surface roughness were discussed. It is proved that the wetting ability and wetting degree of substrate are closely related with the surface Gibbs energy and roughness of substrate and coating liquid surface Gibbs energy . Gibbs energy derived substrate is conducive to the increase of the substrate coating process for wetting the surface. When the substrate surface Gibbs energy is greater than the surface energy of the liquid coating, the wet process can be spontaneous. With the increase of the substrate surface roughness, wetting degree increased . In this condition , the spreading process may not necessarily be spontaneous. C、This paper further studied factors which affected the adhesion between the coating and substrate. According to the established thermodynamic model of wetting, and method to improve the adhesion between substrate coated with metal, plastic substrate is discovered. D、Take adhesion between Polyurethane coating and the metal substrate for example, focused on the impact of adhesion of the substrate roughness, substrate pretreatment, the number of polar functional groups of liquid coatings (incorporation of DMPA ) . The results show that: the preparation on metal substrate surface (grinding, rust removal, degreasing, phosphating, sandblasting), an increase in the number of polar functional groups of coating formulations , the control of the ratio between soft and hard segments, and maintain certain paint viscosity play a significant role in improving the adhesion between coating and substrate . E、Take Polypropylene plastic substrates for another example, focused on method to improve adhesion of plastic coatings and the plastic substrate , based on polypropylene plastic surface pretreatment (mechanical polishing, chemical oxidation), resins and solvent selection ,we got following conclusions through experiments: pretreatment on the surface of polypropylene plastic,the especially chemical oxidation pre-treatment can effectively improve the surface Gibbs energy,makes it much easier to wet the substrate coating. The increase in substrate roughness can also effectively increase wetting degree, but when the roughness increases to certain value, it will affect the adhesion of coating on the substrate. Because of the characteristics of polypropylene plastic, selected chlorinated polypropylene resin similar to its structure has a great adhesion. When we take the modified chlorinated polypropylene or chlorine content of 25% isotactic chlorinated polypropylene as the plastic primer or adhesion promoter, the adhesion between the coating and the substrate is better. Because of its high crystallinity, solvent resistance and other characteristics, Polypropylene plastic products makes the choice of solvent also much more difficult. In this paper we selected a group of mixed organic solvents which can improve adhesion between the coating and the polypropylene plastic substrate. |
2樓2010-11-06 15:49:09
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3樓2010-11-06 17:28:51
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4樓2010-11-06 20:17:29
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