铁氧体辅助微波脱硫活化胶粉及其与丁苯橡胶并用胶性能的研究

Ferrite-assisted Microwave Desulfurization and Activation of Rubber Powder and Properties of Modified Rubber Powder/SBR Blends

以微波吸收能力强的纳米铁氧体与胶粉共混,对胶粉进行微波脱硫活化,研究胶粉/铁氧体共混物和改性胶粉/丁苯橡胶(SBR)并用胶的性能。结果表明:铁氧体可增强微波对胶粉的脱硫活化效果,随着微波辐照时间的延长,胶粉呈现脱硫活化效应增强直至碳化的过程;当微波功率为400 W时,微波辐照时间为3min左右胶粉脱硫效果较好,胶粉/铁氧体硫化胶的拉伸强度和拉断伸长率较大;微波辐照胶粉与SBR的相容性改善,随着SBR用量的增大,胶粉/SBR并用胶的拉断伸长率增大,拉伸强度呈先增大后略减小并很快保持稳定的趋势,铁氧体在胶粉/SBR并用胶中起到一定的补强作用。

Microwave desulfurization and activation of rubber powder was carried out with nanoferrite which had strong microwave absorption ability,and the properties of rubber powder/ferrite blends and modified rubber powder/styrene-butadiene rubber(SBR)blends were studied. The results showed that ferrite enhanced the microwave desulfurization and activation effect of rubber powder. With the increase of microwave irradiation time,the desulfurization and the activation effect of rubber powder increased until carbonization. When microwave power was 400 W and microwave irradiation time was about 3 min,the desulfurization effect of rubber powder was better,and the tensile strength and elongation at break of rubber powder/ferrite vulcanizate were higher. The compatibility of microwave irradiated rubber powder with SBR was improved. With the increase of SBR content,the elongation at break of rubber powder/SBR blend increased,and the tensile strength increased at first,then decreased slightly and quickly reached a stable value. Ferrite played a certain reinforcing role in rubber powder/SBR blend.