Some wetting and adhesion phenomena in polypropylene composites
Some wetting and adhesion phenomena in polypropylene composites
复制标题
聚丙烯复合材料中的一些润湿和粘附现象
DOI：
10.1007/978-94-011-0523-1_6
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
G. E. Schoolenberg
中科院分区：
文献类型：
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作者：
J. J. Elmendorp;G. E. Schoolenberg
如前几章所强调的，聚丙烯（PP）具有许多用作大体积复合材料应用中的基体材料的有利特性。它价格便宜，有各种等级的丰富供应，本身非常坚韧，并且通过其快速结晶，提供了满足汽车工业等所需的短周期时间的承诺。该材料的一个明显缺点是其几乎完全缺乏极性[1]，这导致油漆、涂料和粘合剂的润湿性有限，以及在其用作复合材料（如玻璃毡增强热塑性塑料（GMT））的基质材料时的粘合问题。有效的技术（电晕、火焰处理等）可用于改善聚丙烯及其复合材料的表面特性，但这些方法使界面性能不受影响，因为纤维-基体界面是在熔融浸渍过程本身期间产生的。通过实际聚合物分子的官能化对基质材料进行本体改性已显示出增强纤维-基质结合，但伴随着上述一些有利性质的劣化。
As emphasized in previous chapters, polypropylene (PP) has a number of favourable characteristics for use as matrix material in high volume composite applications. It is cheap, abundantly available in a variety of grades, inherently very tough and, through its rapid crystallization, offers the promise of meeting the short cycle times required by, for example, the automotive industry. A clear disadvantage of the material is its almost total lack of polarity [1] which leads to a limited wettability by paints, coatings and adhesives as well as to adhesion issues in its use as matrix material for composite materials such as glass mat reinforced thermoplastics (GMT). Effective techniques (corona, flame treatments etc.) are available to improve the surface characteristics of polypropylene and its composites, but these methods leave the interfacial properties unaffected since the fibre-matrix interface is created during the melt-impregnation process itself. Bulk modification of the matrix material through functionalization of the actual polymer molecule has been shown to enhance fibre-matrix bonding, but is accompanied by deterioration of some of the favourable properties mentioned above.