摘要
研究了Al2 O3 与NR的相互作用。发现Al2 O3 与NR相互作用的物理交联密度与其吸油值和比表面积呈正相关性 ,与其粒径和 pH值呈负相关性 ,与其吸油值的相关性最大。Al2 O3 对硫化体系与NR的化学相互作用有屏蔽效应 ,使化学交联密度下降。其屏蔽效应与其比表面积和吸油值呈负相关性 ,与其粒径和 pH值呈正相关性。Al2 O3 的粒径为 4 μm时对NR无补强作用 ,粒径为 1μm时稍有补强作用 ,粒径小于 2 5nm时补强作用很大 ,全部是物理健的贡献 ,添加偶联剂 ,强度只增加 8.9% ,但是 ,化学相互作用的贡献达 89.8% ,化学交联占总交联密度的 77.5 %。
In this paper, we have studied the interactions between Al 2O 3 and NR,and have found that the physical crosslink density of interactions between Al 2O 3 and NR is a positive interrelations with oil absorption and specific surface area, and a negative interrelations with particle diameter and pH. But the interrelation between physical closslink density and oil absorption is higher than other parameters. The Al 2O 3 provides a protective screen for the vulcanizator, so the chemical crosslink density of interactions between vulcanizator and NR is decreased. But the decrease is a negative interrelations with specific surface area. The results indicate that it has chemical interactions between Al 2O 3 and NR.Al 2O 3-1(particle diameter 4 μm).It has no reinforcement for rubber, Al 2O 3-1 (1μm) has a little reinforcement, nano Al 2O 3 has greater reinforcement for rubber. All reinforcements for rubber are the contributions of physical crosslink. The interactions between n Al 2O 3/NDZ-101 and NR show that the chemical crosslink predominates over the physical crosslink. The chemical crosslink holds determination for contribution of tensile strength.
出处
《弹性体》
CAS
2002年第2期1-4,共4页
China Elastomerics
基金
国家自然科学基金项目 (2 96 74 0 13)
