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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >Surface finish of injection molded materials by micro-thermal analysis
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Surface finish of injection molded materials by micro-thermal analysis

机译：注射成型材料的表面光洁度的微热分析

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In typical injection molding processes, surface defects are often encountered, yielding products of inferior part quality. In an effort to identify and eliminate any unwanted finish, surface defects have been created consistently by injection molding and examined via the use of a new technique known as micro-thermal analysis ( muTA(TM)). muTA(TM) is an analytical form of microscopy that combines atomic force microscopy (AFM) and differential thermal analysis (DTA). The experiment was performed on polycarbonate/acrylonitrile-styrene-acrylate (PC/ASA) injection molded parts, using thermal probes. Surface defects, such as variations in gloss level, were produced on injection molded plaques by changing molding parameters including material temperature and packing pressure. muTA(TM) results reveal that rubber particle aggregation is one of the reasons for lowering the parts surface finish, also that scans performed at elevated temperatures, show that there were no changes in the polymer's multiphase morphology. Additionally, depth profiling by muTA(TM) established that PC and ASA are rich at the outermost surface of regions that possess a dull finish, whilst PC is the dominant material in regions of high gloss. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 23]
机译：在典型的注塑工艺中，经常会遇到表面缺陷，从而产生零件质量较差的产品。为了识别和消除任何不需要的表面处理，已经通过注模法不断产生表面缺陷，并通过使用一种称为微热分析（muTATM）的新技术对其进行了检查。 muTA TM是结合原子力显微镜（AFM）和差热分析（​​DTA）的显微镜的分析形式。使用热探针在聚碳酸酯/丙烯腈-苯乙烯-丙烯酸酯（PC / ASA）注塑零件上进行了实验。通过改变包括材料温度和填充压力在内的成型参数，可在注塑板上产生表面缺陷，例如光泽度变化。 muTA TM结果表明，橡胶颗粒聚集是降低零件表面光洁度的原因之一，而且在升高的温度下进行的扫描表明，聚合物的多相形态没有变化。另外，通过muTA TM进行的深度剖析证实，PC和ASA在具有暗淡光洁度的区域的最外表面上是丰富的，而PC是高光泽度区域中的主要材料。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：23]

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