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

发布时间：2018-10-21 18:42

【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(P0.05),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(P0.05)。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。
[Abstract]:Objective: to evaluate the effect of different resin surface treatment on bonding strength of silicone rubber and acrylic resin. Methods: the surface of 56 acrylic resin strips was polished with 600 mesh silicon carbide sandpaper. The results were as follows: direct coating coupling agent was used as control group (C group), sand blasting coating coupling agent (S group), methyl methacrylate monomer infiltrating after coating coupling agent (M group), sand blasting methyl methacrylate monomer infiltrating, Finally, the coupling agent was coated (SM group). Four groups of silicone rubber acrylic resin bonded specimens (nb7) were prepared. The surface morphology was observed by scanning electron microscope, the roughness of the specimens was measured by roughness meter, and the shear bonding strength was tested by universal tester. Results: the surface of acrylic resin in group S and M was rougher. The surface roughness of group S was significantly higher than that of control group (P0.05) between group), SM and S, but there was no significant difference between group M and group C. the shear bonding strength of group SM was the highest (2.31 卤0.17) MPa, followed by S (2.31 卤0.17) MPa,. Group M and group C (P0.05). 4 groups of specimens were damaged by silicone rubber cohesion. Conclusion: sand blasting and surface treatment of MMA monomer can change the surface properties of acrylic resin and improve the bonding strength between silicone rubber and acrylic resin.
【作者单位】：大连市口腔医院口腔修复科;第四军医大学口腔医学院;
【基金】：国家自然科学基金(编号:30471908)
【分类号】：R783.1

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