Adhesion enhancement of polymer surfaces by atmospheric plasma treatment
Adhesion enhancement of polymer surfaces by atmospheric plasma treatment
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DOI：
10.1088/0022-3727/34/18/307
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发表时间：
2001-09
期刊：
影响因子：
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通讯作者：
M. Shenton;M. Lovell-Hoare;G. Stevens
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文献类型：
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作者：
M. Shenton;M. Lovell-Hoare;G. Stevens
英国EA科技有限公司研发的一种大气压非平衡等离子体（APNEP）目前正与萨里大学合作进行研究。在利用等离子体可引发的众多表面改性应用中，增强粘附性是商业上最为重要的应用之一。在本文中，我们阐述了利用大气压等离子体来增强低密度聚乙烯（LDPE）和聚对苯二甲酸乙二醇酯（PET）的粘附特性。这些聚合物是在大气压等离子体的远程余辉区域进行处理的，以避免当热敏感材料与等离子体直接接触时可能导致其降解的热效应。通过180°剥离试验测量，活性（含氧气）和惰性（无氧）大气压等离子体可使粘附性迅速提高2到10倍。然而，长时间暴露于大气压等离子体并不会进一步提高粘附性，因为表面会被烧蚀，暴露出粘附特性较差的下层聚合物。相比之下，经真空等离子体处理的LDPE和PET随着等离子体处理时间的延长，粘附性会提高。研究发现，对于真空等离子体处理时间超过10分钟的情况，粘附性可提高2到3个数量级以上。
An atmospheric pressure non-equilibrium plasma (APNEP) developed in the UK by EA Technology Ltd is currently being investigated in collaboration with the University of Surrey. Of the many applications of surface modification that can be induced using plasmas, adhesion enhancement is one of the most commercially important. In this paper, we illustrate the use of an atmospheric plasma to enhance the adhesion characteristics of low-density polyethylene (LDPE) and poly(ethylene terephthalate) (PET). The polymers were treated in the remote afterglow region of an atmospheric pressure plasma to avoid the thermal effects that can cause degradation for thermally sensitive materials when placed in direct contact with the plasma. Reactive (oxygen containing) and inert (oxygen free) atmospheric plasmas rapidly impart adhesion enhancement by a factor of two to ten as measured by 180° peel tests. However, extended exposure to the atmospheric plasma does not impart additional adhesion enhancement as the surface is ablated revealing the underlying polymer with poor adhesive characteristics. In contrast, vacuum plasma treated LDPE and PET show increased adhesion with extended plasma treatment. An adhesion enhancement in excess of two to three orders of magnitude was found to be achievable for vacuum plasma treatment times greater than 10 min.