摘要
以纳米 Si O2 作为增强材料 ,制备纳米复合材料 ,研究了不同的纳米 Si O2 含量对纳米复合材料冲击强度、拉伸模量、玻璃化温度的影响 ,采用正电子湮没技术研究纳米粒子对自由体积参数的影响。结果表明 ,当纳米粒子 Si O2 含量为 3%时 ,纳米复合材料的拉伸模量为 3.5 7GPa,冲击强度为 1 5 .94k J/m2 ,玻璃化温度为 1 2 6.65℃ ,分别比纯基体提高了 1 2 .6%、5 6.3%、40 .4%。
It is well known that nanometer, which is well dispersed in polymer, can improve the strength, modulus and toughness of polymer. We prepared nano composite with nanometer SiO 2 and epoxy CYD-128. Section 1 describes the seven aspects of the experimental work we did. Section 2 gives and discusses our experimental results. In Table 1 in subsection 2.1, we summarize the effect of amount of SiO 2 content on impact strength, tensile strength, and tensile modulus of elasticity. From Table 1, we can see that when SiO 2 is 3%, impact strength reaches 15.94 kJ/m 2, 56.3% higher than when SiO 2 is 0%; when SiO 2 is 3%, tensile modulus reaches 3.57 GPa, 12.6% higher than when SiO 2 is 0%. Subsection 2.2 discusses how addition of nanometer SiO 2 increases tensile modulus. In Table 2, in subsection 2.3, we summarize the effect of nanometer SiO 2content on glass transition temperature ( T g ). From Table 2, we can see that when SiO 2 is 3%, T g reaches 126.65℃, 40.4% higher than when SiO 2is 0%. In Table 3, we summarize the effect of amount of SiO 2 content on the free volume parameters τ 3 /ns and I 3 /%; this effect was analyzed with positron annihilation technique. These experimental data and their analysis show preliminarily that nanometer SiO 2, which is well dispersed in resin, can improve the impact strength, tensile strength, tensile modulus and T g of epoxy resin.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2002年第3期492-496,共5页
Journal of Northwestern Polytechnical University
