title: [Effect of surface organic modified nano-silicon-oxide on mechanical properties of A-2186 silicone elastomers].
abstract: OBJECTIVE
  To study the effect of surface organic modified nano-silicon-oxide (SiO(x)) on mechanical properties of A-2186 silicone elastomers.
  
  
  METHODS
  Surface organic modified nano-silicon-oxide (SiO(x)) was added into A-2186 silicone elastomers by weight percentage of 2%, 4% and 6%. The one without addition served as a control. Standard specimens were made according to American Society for Testing Materials (ASTM). Their tensile strength, elongation at break, tear strength, and Shore A hardness were measured. The results were analyzed statistically by SPSS 10.0 software package.
  
  
  RESULTS
  The tensile strength in the experimental groups was significantly lower than the control group (P<0.001).The elongation in the experimental groups was lower than the control group, but there was no significant difference between the 2wt% group and the control group (P=0.068). The tear strength in both the 2wt= group and 4wt= group were higher than the control group, and the difference was statistically significant; in addition, the tear strength in 2wt= group was higher than 4wt= group, which also showed statistical significance (P<0.001). With the increase of the added amount of surface modified nano-SiO(x), Shore A hardness increased and there was significant difference among them (P<0.001).
  
  
  CONCLUSIONS
  Adding surface modified nano-SiO(x) has an effect on mechanical properties of A-2186 silicone elastomer, when 2wt= and 4wt= are added, tear strength of A-2186 improves significantly, with an increase of Shore A hardness and an decrease of tensile strength.
authors: Department of Prosthodontics, Shanghai Jiao Tong University School of Medicine, Shanghai,China. athenaguonan@163.com
authors: Nan
authors: N
authors: Guo
authors: Ting
authors: T
authors: Jiao
mesh_terms: D004129:Dimethylpolysiloxanes; D004548:Elasticity; D006244:Hardness; D008422:Materials Testing; D008447:Maxillofacial Prosthesis; D010087:Oxides; D012825:Silicon; D012826:Silicone Elastomers; D013718:Tensile Strength
chemical_list: C076788:A 2186; D004129:Dimethylpolysiloxanes; D010087:Oxides; D012826:Silicone Elastomers; D012825:Silicon