Ageing of surface treated thermoplastic polyolefins

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• 作者：Firas Awaja ; Michael Gilbert ; Minoo Naebe ; Georgina Kelly ; Bronwyn Fox ; Russell Brynolf ; Paul J. Pigram
• 关键词：Polypropylene ; Ageing ; XPS ; Contact angle ; Adhesion
• 刊名：Polymer Degradation and Stability
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：98
• 期：9
• 页码：1699-1704
• 全文大小：416 K

文摘

Thermoplastic polyolefin panels were treated with a flame, flame & water, and accelerated thermo molecular adhesion process (ATmaP) treatment. XPS, contact angle and adhesion test (pull off) results were acquired over a one year period to determine the changes in the elemental composition, surface energy and adhesion strength respectively over time. All surface-treated thermoplastic polyolefin samples showed a sharp decline in adhesion strength up to an ageing period totalling 6 months. The decline in adhesion strength was correlated with a decline in the nitrogen-containing constituents and C-O functional groups at the surface and a decline in surface energy for the flame & water-treated sample. There was no significant change in adhesion strength for all samples for ageing periods greater than 6 months. ATmaP-treated thermoplastic polyolefin outperformed the other two surface treatments in adhesion strength tests due to ATmaP retaining nitrogen-based functional groups (mainly nitrogen oxides) over the year long study. This retention of functionality allowed for a slower ageing process for ATmaP-treated surfaces in comparison to the other surface treatments.