摘要
目的:评价不同树脂表面处理对硅橡胶与丙烯酸树脂粘接强度的影响。方法:56个丙烯酸树脂条表面经600目碳化硅砂纸打磨后,分别进行如下处理:直接涂布偶联剂作为对照组(C组),喷砂后涂布偶联剂(S组),甲基丙烯酸甲酯单体浸润后涂布偶联剂(M组),喷砂后甲基丙烯酸甲酯单体浸润,最后涂布偶联剂(SM组)。制备4组硅橡胶丙烯酸树脂粘接试件(n=7),用扫描电镜观察表面形态,粗糙度仪检测试件表面粗糙度,万能实验机对试件测试剪切粘接强度。结果:S组与M组的丙烯酸树脂表面较粗糙。S组的表面粗糙度明显高于对照组(P<0.05),SM组与S之间、M组与C组之间差异无显著性。SM组的剪切粘接强度最高(2.31±0.17)MPa,其次依次为S组,M组及C组(P<0.05)。4组试件破坏方式均为硅橡胶内聚破坏。结论:喷砂及MMA单体表面处理可以改变丙烯酸树脂的表面性状,提高硅橡胶与丙烯酸树脂之间的粘接强度。
Objective： To evaluate the effect of surface treatments on the bonding strength of silicone elastomer to acrylic resin （AR）. Methods： 56 acrylic resin strips were polished with 600-grit silicon carbide paper and divided randomly into 4 groups. The bonding surface were pretreated with the following methods： application of coupling agent （group C）, coupling agent after sandblast （group S）, coupling agent after immersion in methyl methacrylate （group M ）, coupling agent after sandblast and immersion in methyl methacrylate（group SM）, then the surface of the AR samples was observed by SEM. The roughness was measured with a roughness meter. 28 overlap-joint models were made with silicone elastomer between 2 treated acrylic resin strips. 7 specimens were fabricated for each groups. Failure loads and failure style were assessed by universal test machine. Results： SEM images showed that sandblast and MMA treatment produced significant surface texture changes of the acrylic resin. Group S demonstrated significantly higher surface roughness values compared to Group C （P 〈 0.05）. No difference was found between Group SM and S, Group M and C. Group SM showed the highest shear bond strength followed by Group S, M and C （ between each 2 groups, P 〈 0.05 ）. All specimens showed cohesive failure of the silicone elastomer. Conclusion： Treatment of acrylic resin by sandblast and MMA immersion can improve the adhesion between silicone elastomer and acrylic resin.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2014年第3期297-301,共5页
Journal of Practical Stomatology
基金
国家自然科学基金(编号:30471908)
关键词
硅橡胶
丙烯酸树脂
表面处理
剪切粘接强度
Silicone elastomer
Acrylic resin
Surface treatment
Shear bond strength
