首页> 外文期刊>Dental materials >Evaluation of fracture toughness and mechanical properties of ternary thiol-ene-methacrylate systems as resin matrix for dental restorative composites
【24h】

Evaluation of fracture toughness and mechanical properties of ternary thiol-ene-methacrylate systems as resin matrix for dental restorative composites

机译:牙科修复复合材料三元硫醇-甲基丙烯酸甲酯体系的断裂韧性和力学性能的评估

获取原文
获取原文并翻译 | 示例
       

摘要

Objective. Study and evaluation of fracture toughness, flexural and dynamic mechanical properties, and crosslink density of ternary thiol-ene-methacrylate systems and comparison with corresponding conventional methacrylate system were considered in the present study. Methods. Urethane tetra allyl ether monomer (UTAE) was synthesized as ene monomer. Different formulations were prepared based on combination of UTAE, BisGMA/TEGDMA and a tetrathiol monomer (PETMP). The photocuring reaction was conducted under visible light using BD/CQ. combination as photoinitiator system. Mechanical properties were evaluated via measuring flexural strength, flexural modulus and fracture toughness. Scanning electron microscopy (SEM) was utilized to study the morphology of the fractured specimen's cross section. Viscoelastic properties of the samples were also determined by dynamic mechanical thermal analysis (DMTA). The same study was performed on a conventional methacrylate system. The data were analyzed and compared by ANOVA and Tukey HSD tests (significance level = 0.05). Results. The results showed improvement in fracture toughness of the specimens containing thiol-ene moieties. DMTA revealed a lower glass transition temperature and more homogenous structure for thiol-ene containing specimens in comparison to the system containing merely methacrylate monomer. The flexural modulus and flexural strength of the specimens with higher thiol-ene content were lower than the neat methacrylate system. The SEM micrographs of the fractured surface of specimens with higher methacrylate content were smooth and mirror-like (shiny) which represent brittle fracture. Significance. The thiol-ene-methacrylate system can be used as resin matrix of dental composites with enhanced fracture toughness in comparison to the methacrylate analogous.
机译:目的。本文研究并评价了三元硫醇-烯-甲基丙烯酸酯体系的断裂韧性,弯曲和动态力学性能以及交联密度,并与相应的常规甲基丙烯酸酯体系进行了比较。方法。合成氨基甲酸酯四烯丙基醚单体(UTAE)作为烯类单体。基于UTAE,BisGMA / TEGDMA和四硫醇单体(PETMP)的组合制备了不同的制剂。使用BD / CQ在可见光下进行光固化反应。组合作为光引发剂系统。通过测量弯曲强度,弯曲模量和断裂韧性来评估机械性能。扫描电子显微镜(SEM)用于研究断裂试样横截面的形态。样品的粘弹性也通过动态机械热分析(DMTA)测定。在常规的甲基丙烯酸酯体系上进行了相同的研究。通过ANOVA和Tukey HSD测试对数据进行分析和比较(显着性水平= 0.05)。结果。结果表明,包含硫醇-烯部分的样品的断裂韧性得到改善。与仅包含甲基丙烯酸酯单体的系统相比,DMTA显示出较低的玻璃化转变温度和更均匀的结构,对于含硫醇烯的样品。硫醇-烯含量较高的样品的弯曲模量和弯曲强度低于纯甲基丙烯酸酯体系。甲基丙烯酸酯含量较高的试样的断裂表面的SEM显微照片光滑且呈镜面状(发亮),表示脆性断裂。意义。与类似的甲基丙烯酸酯相比,硫醇-烯-甲基丙烯酸酯体系可以用作具有增强的断裂韧性的牙科复合材料的树脂基质。

著录项

  • 来源
    《Dental materials》 |2013年第7期|777-787|共11页
  • 作者单位

    Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran;

    Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran;

    Iran Polymer and Petrochemical Institute (IPPI), P.O. Box 14965/115, Tehran, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Dental composites; Resin matrix; Thiol-ene system; Mechanical properties; Fracture toughness;

    机译:牙科复合材料;树脂基质硫醇体系机械性能断裂韧性;
  • 入库时间 2022-08-18 03:47:03

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号