Effect of Preferential Orientation of Lamellae in the Interfacial Region between a Block Copolymer-based Pressure-Sensitive Adhesive and a Solid Substrate on the Peel Strength
Effect of Preferential Orientation of Lamellae in the Interfacial Region between a Block Copolymer-based Pressure-Sensitive Adhesive and a Solid Substrate on the Peel Strength
复制标题
嵌段共聚物基压敏粘合剂与固体基材界面区域片层的择优取向对剥离强度的影响
DOI：
10.1021/acs.langmuir.7b03860
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
and Tsukasa Miyazaki
中科院分区：
文献类型：
--
作者：
Keisuke Shimokita;Itsuki Saito;Katsuhiro Yamamoto;Mikihito Takenaka;Norifumi L. Yamada;and Tsukasa Miyazaki
我们已经研究了基于嵌段共聚物的压敏粘合剂的剥离强度之间的关系，包括聚（甲基丙烯酸甲酯）（PMMA）和聚（丙烯酸正丁酯）（PnBA）组分从基板和微区取向之间的界面区域的粘合剂和基板。对于PMMA基材，在140 °C下样品的老化过程中，粘合剂中对基材具有强亲和力的PMMA组分附着在基材表面。接下来，邻近基板表面的PMMA层被PnBA层覆盖，PnBA层共价连接，导致界面区域中的层的水平对准。粘合剂的剥离强度在140 °C下老化期间显著增加，这与完成水平取向的层状结构花费相同的时间。然而，在聚苯乙烯（PS）基材的情况下，粘合剂中的两种组分排斥基材，导致形成垂直取向的层状结构。结果，粘合剂相对于其PS基材的剥离强度在老化时不完全增加。结果表明，胶粘剂的剥离强度与胶粘剂和基材之间的界面能高度相关，这可以从界面区域的微区取向来估计。
We have investigated the relationship between the peel strength of a block copolymer-based pressure-sensitive adhesive comprising of poly(methyl methacrylate) (PMMA) and poly(n-butyl acrylate) (PnBA) components from the substrate and the microdomain orientations in the interfacial region between the adhesive and the substrate. For the PMMA substrate, the PMMA component in the adhesive with a strong affinity for the substrate is attached to the surface of the substrate during an aging process of the sample at 140 °C. Next, the PMMA layer adjacent to the substrate surface is overlaid with a PnBA layer, which gets covalently connected, resulting in the horizontal alignment of the lamellae in the interfacial region. The peel strength of the adhesive substantially increases during aging at 140 °C, which takes the same time as the completion of the horizontally oriented lamellar structure. However, in the case of the polystyrene (PS) substrate, both the components in the adhesive repel the substrate, leading to the formation of the vertically oriented lamellar structure. As a result, the peel strength of the adhesive with respect to its PS substrate does not entirely increase on aging. It is suggested that the peel strength of the adhesive is highly correlated with the interfacial energy between the adhesive and substrate, which can be estimated from the microdomain orientation in the interfacial region.