
抽油杆用CF/VE拉挤复合材料在盐溶液中的老化机理
王莉莉1;于运花1*;杨小平1;刘鸿亮2;
北京化工大学学报(自然科学版) ›› 2004, Vol. 31 ›› Issue (2) : 31-35.
抽油杆用CF/VE拉挤复合材料在盐溶液中的老化机理
Aging mechanisim of pultruded carbon fiber/vinylester resin composite used for sucker rods in brine solution
The absorption characteristics, the changes in the static mechanical properties and dynamic mechanical thermal properties of the pultruded carbon fiber /vinyl ester (CF/VE) composite, which was used for sucker rod in oil field, were studied as it was immersed in 3% NaCl aqueous solution at 95℃. The results show that the composite obeys the Fick's second law in terms of absorption behavior, having an equilibrium moisture content about 0.778% and a diffusion coefficient of the order of 4.988×10-6mm2/s, and a decrease in the properties of the composite is very relative to the increase in its moisture content. After the composite had been immersed for 1 176 hours, its interlaminar shear strength and flexural strength had a reservation about 63% and 66%, respec-
tively. The results of dynamic mechanical thermal analysis (DMTA) and SEM show that changes in properties are caused by swell and plasticization of matrix, interfacial debonding and the microstructure changes of matrix and interface. No chemical changes are found.
[1] 杨小平,李鹏,王成忠,等.乙烯基酯树脂基碳纤维连续抽油杆的研制[J].石油机械,2003,31(4):35-38
[2] 于运花,王成忠,杨小平,等.碳纤维/乙烯基酯树脂拉挤复合材料基体固化体系的研究[J].北京化工大学学报,2002,29(3):28-31
[3] 王成忠,于运花,杨小平,等.碳纤维/乙烯基酯树脂拉挤复合材料界面性能研究[J].复合材料学报,2003,20(5):68-71
[4] Shen C H, George S Springer. Moisture absorption and desorption of composite materials[J]. Journal of Composite Materials, 1976,10(1): 2-20
[5] Jovan Mijovic, Lin K F. The Effect of hygrothermal fatigue on physical/ mechanical properties and morphologyof neat epoxy resin and graphite/epoxy composite[J]. Journal of Applied Polymer Science, 1985,30(6):2527-2549
[6] Moy P, Karasz F E. Epoxy-water interactions[J]. Polymer Engineering and Science, 1980, 20: 315-319
[7] Zhou J M, James P Lucas. Hygrothermal effects of epoxyresin. PartⅠ: the nature of water in epoxy[J]. Polymer, 1999,40(20): 5505-5512 [8] Antoon M K, Koenig J L. Fourier-Transform infrared study of the reversible interaction of water and acrosslinked epoxy matrix[J]. Journal of Polymer Sci-
ence: Polymer Physics, 1981,19(10): 1567-1575
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