Mechanical properties of dental nanocomposites reinforced with polyhedral oligomeric silsesquioxane(POSS)
The objective of this study was to incorporate POSS-MA into the polymeric matrix to develop a new kind of nanocomposite. The effect of different weight percentage of POSS incorporated into the matrix on the mechanical properties was also evaluated. Infrared spectroscopic technique and X-ray diffraction were used to characterize their microstructures and double bond conversion. With only 2wt％ POSS added, the nanocomposite’s flexural strength increased 15％, compressive strength increased 12％, hardness increased 15％ and uncommonly, even the toughness of resins obviously increased. With 5wt％ POSS polymerized, compressive strength increased from 192MPa to 251MPa and compressive modulus increased from 3.93GPa to 6.62GPa, but flexure strength began to decline from 87MPa to 75MPa. The nanocomposites incorporated with POSS showed greatly improved mechanical properties, and increased wear resistance and service life. The mechanism of reinforcement was also discussed.
Mechanical properties Dental nanocomposites Polyhedral oligomeric silsesquioxane (POSS) Characterization
Xiaorong Wu Weili Xie Yi Sun Shouhua Sun
Department of Astronautic Science and Mechanics, Harbin Institute of Technology, China Department of Stomatology, Harbin Medical University, China
国际会议
青岛
英文
345-348
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）