The improvement in adhesion of polyurethane-polypropylene composites by short-time exposure of polypropylene to low and atmospheric pressure plasmas
The improvement in adhesion of polyurethane-polypropylene composites by short-time exposure of polypropylene to low and atmospheric pressure plasmas
复制标题
通过将聚丙烯短时间暴露于低压和大气压等离子体来提高聚氨酯-聚丙烯复合材料的粘合力
DOI：
10.1163/156856195x00464
复制
发表时间：
1995
影响因子：
2.3
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
J. Friedrich;W. Unger;A. Lippitz;T. Gross;P. Rohrer;W. Saur;J. Erdmann;H.
将聚合物，即聚丙烯、共聚物和共混物的表面暴露于低压氧气和大气压空气等离子体，以改善它们与聚氨酯粘合剂的粘合性。聚丙烯-聚氨酯复合材料的搭接剪切强度和相关的XPS，AFM和NEXAFS数据之间的相关性。发现等离子体官能化即使在暴露时间较低时也将粘附性改善至最大值：对于低压等离子体为1至10秒，并且在大气等离子体射流处理的情况下为0.1至1秒。因此，在相对小的氧含量下获得高搭接剪切强度。在短时间等离子体暴露的剪切强度的改善似乎是相关的拉伸聚丙烯箔的超分子结构的完全平滑，如通过AFM所示。价带XPS和衍生化技术揭示了聚丙烯上氧功能化的更多细节。NEXAFS实验证实了通过等离子体暴露的大分子的键和片段的重新取向，这被认为是粘附改善的原因
The surfaces of polymers, namely polypropylene, copolymers and blends, were exposed to low pressure oxygen and atmospheric pressure air plasmas to improve their adhesion to polyurethane adhesives. A correlation is attempted between lap shear strengths of polypropylene-polyurethane composites and the relevant XPS, AFM and NEXAFS data. It was found that plasma functionalization improved the adhesion to maximum values even when the time of exposure was low: 1 to 10 seconds for low pressure plasmas, and 0.1 to 1 seconds in case of atmospheric plasma jet treatments. Thus, high lap shear strengths were obtained at relatively small oxygen contents. The improvement in shear strength at short time plasma exposures seems to be correlated to the complete smoothening of the supermolecular structure of stretched polypropylene foils as shown by AFM. Valence band XPS and derivatization techniques revealed more details of the oxygen functionalization on polypropylene. NEXAFS experiments confirmed a re-orientation of bonds and segments of the macromolecules by plasma exposure which are assumed to be responsible for adhesion improvement