Mouzakis Dionysios E, Papadopoulos Triantafillos D, Polyzois Gregory L, Griniari Panagiota G
School of Mechanical Engineering, Technological Educational Institute of Larisa, Larisa, Greece.
J Craniofac Surg. 2010 Nov;21(6):1867-71. doi: 10.1097/SCS.0b013e3181f43f43.
The main objective of the current study was to investigate the dynamic mechanical properties of a room-temperature vulcanizing silicone incorporating different fractions of zinc oxide (ZnO) after indoor and outdoor photoaging. Forty-eight samples were produced by adding different amounts of ZnO into a commercial maxillofacial silicone (EPISIL-E). The samples were divided into 4 groups containing 0.0, 0.2, 0.5, and 1 wt% ZnO additive, respectively. Samples were exposed to sunlight (subgroup 2), ultraviolet (subgroup 3), and fluorescence (subgroup 4) aging, whereas nonaged samples comprised the control subgroup (subgroup 1). Dynamic mechanical analysis was used to determine the storage modulus (E'), loss modulus (E″), and damping capacity (tanδ). General linear statistic model was conducted to evaluate the effects of aging, testing frequency, and composition on the dynamic mechanical properties of the silicone with the ZnO additive. Post hoc analysis was performed using Tukey test. Statistical analysis revealed a significant impact of composition on tanδ (P < 0.05). Aging influenced E' and E″ (P < 0.01). The combination of aging and composition had a significant effect on all dynamic properties (P < 0.01).
本研究的主要目的是调查在室内和室外光老化后，掺入不同比例氧化锌（ZnO）的室温硫化硅橡胶的动态力学性能。通过向商用颌面硅橡胶（EPISIL-E）中添加不同量的ZnO制备了48个样品。样品分为4组，分别含有0.0、0.2、0.5和1 wt%的ZnO添加剂。样品分别进行阳光（第2亚组）、紫外线（第3亚组）和荧光（第4亚组）老化处理，而未老化的样品作为对照亚组（第1亚组）。采用动态力学分析来测定储能模量（E'）、损耗模量（E″）和阻尼能力（tanδ）。采用一般线性统计模型来评估老化、测试频率和组成对含ZnO添加剂的硅橡胶动态力学性能的影响。使用Tukey检验进行事后分析。统计分析表明，组成对tanδ有显著影响（P < 0.05）。老化对E'和E″有影响（P < 0.01）。老化和组成的组合对所有动态性能有显著影响（P < 0.01）。
