Structure size effect on polymer infiltration in injection molded direct joining
Structure size effect on polymer infiltration in injection molded direct joining
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DOI：
10.1016/j.precisioneng.2020.09.017
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发表时间：
2021
影响因子：
3.6
通讯作者：
S. Kadoya;Fuminobu Kimura;T. Yanagishita;Y. Kajihara
中科院分区：
文献类型：
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作者：
S. Kadoya;Fuminobu Kimura;T. Yanagishita;Y. Kajihara
在注射成型过程中聚合物渗入金属表面结构导致直接和紧密的金属-聚合物连接。通过阳极氧化将金属表面结构的尺寸保持在50-500 nm范围内，并在本研究中研究了在各种注射速度条件下渗透到几种尺寸的结构中的深度。在溶解接头试样的金属部分后，使用原子力显微镜对复制的结构进行评估。实验结果表明，结构尺寸引起的过渡的渗透依赖于注射速度。在聚丁烯酸酯-铝合金连接中，对于小于或等于300 nm的气孔，随着注射速度的降低，熔渗深度增加;对于大气孔，随着注射速度的提高，熔渗深度增加。在几十纳米量级的结构中，流动聚合物的粘弹性和分子取向对聚合物的变形和渗透的影响远大于固化过程。本研究的发现为注塑直接连接的锚固机制提供了新的见解，并可改善注塑过程中的微/纳米复制。
Polymer infiltration into metal surface structures during injection molding results in a direct and tight metal–polymer joint. Sizes of metal surface structures were maintained within the 50–500 nm range by anodization, and the infiltration depth into several sizes of the structures under various injection speed conditions were investigated in this study. Replicated structures were evaluated using atomic force microscopy after dissolving the metal parts of the joint specimens. The experimental results revealed that the structure size caused a transition of the infiltration dependence on the injection speed. In the case of polybutylene terephthalate–aluminum alloy joining, the infiltration depth increased with the low injection speed the pores equal to or smaller than 300 nm, while the high injection speed led to deep infiltration for the large pores. In structures of the order of tens of nanometers, the viscoelasticity of flowing polymer and molecular orientation could affect the polymer deformation and infiltration much more than the solidification process. The findings in this study provide insights into the anchoring mechanism of injection molded direct joining and could improve the micro/nano replication in the injection molding process.