title: [Mechanical properties of preimpregnated glass fiber reinforced composite resins].
abstract: OBJECTIVE
  To study the mechanical properties of two kinds of composite resins reinforced by preimpregnated glass fibers.
  
  
  METHODS
  Sinfony and belleGlass composite resins were used to make standard samples (25 mm x 2 mm x 2 mm) with and without glass fibers. After all specimens were stored for 24 hours in distilled water at (37 +/- 1) degrees C, the flexural strength and flexural modulus were measured on a universal test machine.
  
  
  RESULTS
  Both flexural strength and flexural modulus of Sinfony composite reinforced by the glass fibers became significantly increased, which were (555.76 +/- 67.31) MPa and (12.59 +/- 3.06) GPa respectively, and 4.5 and 2.5 times much more than those of the specimens without glass fibers (P = 0); the flexural modulus of belleGlass composite became significantly increased, which was (14.10 +/- 2.88) GPa, and 0.9 time much more than the specimens without glass fibers (P = 0), but the improvement of flexural strength was not significant.
  
  
  CONCLUSIONS
  Glass fibers can improve the mechanical properties of composite resins, but the reinforcement effect is different between different resins.
authors.affiliation: Dept. of Prosthodontics, School of Stomatology, Peking University, Beijing 100081, China.
authors.forename: Qiu-fei
authors.initials: QF
authors.lastname: Xie
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Gang
authors.initials: G
authors.lastname: Zheng
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D008422:Materials Testing
chemical_list: D003188:Composite Resins; C009753:fiberglass