Abstract The objective of this study was to investigate the influence of polyhedral oligomeric silsesquioxane (POSS) structure on the adhesion behaviour of composite films onto a metallic surface. The composite films consisted of UV cured bisphenol A glycidylmethacrylate/triethylene glycol dimethacrylate (Bis-GMA/TEGDMA) as matrix and reactive POSS structures as adhesion enhancers. Composites were made with 1, 3 and 5 wt % of POSS. Adhesion was evaluated using the micro Vickers hardness testing method. The contact angle of composite films to a brass substrate was measured and compared to the adhesion parameter obtained from microhardness measurements. Optical microscopy indicated morphological segregation in the hybrid films suggesting the compatibility extent between the matrix and each particle. The shape and size of the indent were analyzed and correlated with adhesion quality. The methods used for the estimation of adhesion strength and quality clearly indicated that the highest adhesion enhancement of the Bis-GMA/TEGDMA matrix was POSS reagent containing both polar (hydroxyl) and nonpolar (unsaturated aliphatic - allyl) side groups.

中文翻译：

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不完全缩合的多面体低聚倍半硅氧烷 (POSS) 对混合膜附着力的影响

摘要 本研究的目的是研究多面体低聚倍半硅氧烷 (POSS) 结构对复合膜在金属表面上的粘附行为的影响。复合膜由紫外线固化的双酚 A 甲基丙烯酸缩水甘油酯/三乙二醇二甲基丙烯酸酯（Bis-GMA/TEGDMA）作为基质和反应性 POSS 结构作为粘合增强剂组成。复合材料由 1、3 和 5 重量％的 POSS 制成。使用显微维氏硬度测试方法评估附着力。测量复合膜与黄铜基材的接触角，并将其与从显微硬度测量中获得的粘附参数进行比较。光学显微镜显示混合膜中的形态分离表明基质和每个颗粒之间的相容性程度。分析了压痕的形状和大小，并将其与粘合质量相关联。用于估计粘附强度和质量的方法清楚地表明，Bis-GMA/TEGDMA 基质的最高粘附增强是包含极性（羟基）和非极性（不饱和脂肪族 - 烯丙基）侧基的 POSS 试剂。