玻璃纤维增强硼改性酚醛树脂复合材料的性能

Studies on Properties of Glass Fiber Reinforced Boron Modified Phenolic Resin Composites

研究了玻璃纤维(GF)含量对玻璃纤维增强硼改性酚醛树脂(GF/BPR)复合材料力学性能、耐热性能的影响.结果表明:随着玻璃纤维含量的增加,GF/BPR复合材料的弯曲强度和压缩强度均提高,当玻璃纤维含量达到50%(质量分数,下同)时,其弯曲强度和压缩强度达到最大值;GF/BPR复合材料的冲击强度随着玻璃纤维的增加而增大,当玻璃纤维含量达到70%时,GF/BPR复合材料的冲击强度达到最大值;GF/BPR复合材料的软化变形随着玻璃纤维含量的增大而逐渐降低;当玻璃纤维含量为50%时,GF/BPR复合材料的热变形温度达到196.6℃,比纯BPR提高了51.3℃,而热膨胀系数则降低近1个数量级,为1.6×10-5℃-1.

The relationship between glass fiber（GF） content and thermal properties and mechanical properties of glass fiber reinforced boron modified phenolic resin（GF/BPR） composites were studied. The results show that flexural strength, compressive strength and impact strength of GF/BPR composites increase with the increase of GF content. Flexural strength and compressive strength of GF/BPR composites reach the maximum when GF content is 50%. Impact strength reaches the maximum when GF content is 70%. Deformation of GF/BPR composite decreases with the increase of GF content. Thermal deformation temperature of GF/BPR composite with 50% GF is 196.6℃, which is 51.3℃ higher than that of BPR itself. Thermal expansion coefficient of GF/BPR composite with 50% GF is 1.6×10^-5℃^-1 , which is nearly ten times lower than that of BPR itself.