氯氧镁凝胶/聚丙烯酸酯复合材料弯曲性能的研究

Study on the Flexural Properties of the Magnesium Oxychloride Gelatin/Polyacrylate Composites

研究了氯氧镁凝胶/聚丙烯酸酯复合材料配方各组分对弯曲性能的影响。实验结果表明,复合材料的弯曲性能在砂料质量分数为40%时达到最大,砂料质量分数过高则反而下降。粒径小的砂料具有更好的增强效果。砂料质量分数为40%时,20目级的MOC/PAR复合材料的弯曲强度的增加量达到44.3%,弯曲模量的增加量达到79.8%;40目级的MOC/PAR复合材料的弯曲强度的增加量达到75.4%,其弯曲模量的增加量达到109.7%。

The influences of the variations of the ingredients of the Magnesium oxychloride gelatin/ polyacrylate composites on their flexural properties was studied. Optimum compounds were obtained with 40% of the sand fraction of the composites. Moreover, low flexural properties were given when sand was overfed. Small size of the grains of sand brought about the materials good reinforcement with the raise of the flexural properties. Composite with 40% of mass fraction of sand of which the grain diameter ranged from 0. 35～0. 84 mm resulted in 44. 3% and 79. 8% of the increment of the flexural strength and the flexural modulus, respectively, compared with the blank test. Additionally, composite with the same amount of mass fraction of sand of which the grain diameter ranged from 0. 12 ～ 0. 35 mm exhibited 75.4% and 10. 97% of the increment of the flexural strength and the flexural modulus.