【摘 要】
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In this study, the 24 h tensile strength of new type acetone-urea-formaldehyde furan resin(nitrogen content 3%)was investigated by uniform design optimization.
【机 构】
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School of Materials Science and Engineering,Guangxi Yuchai Machinery Company Limited
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In this study, the 24 h tensile strength of new type acetone-urea-formaldehyde furan resin(nitrogen content 3%)was investigated by uniform design optimization. Four independent variables such as acetone:formaldehyde molar ratio(mol/mol), solution pH value, reaction temperature(0C)and reaction time(min)were considered in the experiments. U*13(134)uniform design was employed and the equation of 24 h tensile strength model was obtained after 13 experimentations. The 24 h tensile strength was optimized by applying single factor experiments and stepwise non-linear regression analysis. Minitab(Minitab 15 trial version)and MATLAB(R2010a trial version)were used for data analysis. The t-value and p-value indicate that the major impact factors include the interaction effect of solution pH value and reaction temperature(X2X3),the linear terms of acetone:formaldehyde molar ratio(X1),reaction time(X4)followed by the square effects of acetone/formaldehyde molar ratio(X1X1).The optimized results were achieved with the acetone:formaldehyde molar ratio(mol/mol)at 3:1, solution pH value at 6.0,reaction temperature at 70℃,and reaction time at 140 min, respectively. This method can not only significantly reduce the number and cost of the tests, but also provide a good experimental design strategy for the development of furan resin. The investigation shows that the predicted results of 24 h tensile strength are consistent well with the experimental ones.
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