N-环己基-2-苯并噻唑次磺酰胺对废旧胶粉脱硫程度的影响

Effect of N-cyclohexyl-2-benzothiazolesulfenamide on desulfurization degree of waste rubber powder

以促进剂N-环己基-2-苯并噻唑次磺酰胺(CZ)为再生剂,通过热机械剪切脱硫法制备了脱硫再生胶(DRR),考察了CZ用量对DRR性能的影响,并通过傅里叶变换红外光谱研究了废旧胶粉的脱硫反应机理。结果表明,废旧胶粉通过热机械剪切可实现有效的脱硫,促进剂CZ的加入可促进脱硫反应,提高脱硫程度;随着促进剂CZ用量的增加,DRR的数均分子量与重均分子量都先大幅度减小后又增大,分子量分布逐渐变宽,再加工性能提高,拉伸性能先提高后降低,当CZ质量分数为2%时,DRR的综合性能达到最佳。

The desorption reclaimed rubber （DRR） was prepared by thermo-mechanical shear desulfurization with accelerator N-cyclohexyl-2- benzothiazole sulfenamide （CZ） as regenerant. The effects of CZ amount on performance of DRR were investigated. The desulfurization reaction mechanism of waste rubber powder was studied by Fourier transform infrared spectroscopy. The results showed that the waste rubber powder could be effectively desulpburized through thermo-mechanical shearing. The addition of accelerator CZ could promote the desulfurization reaction and improve the desulfurization degree. With the increase of the amount of accelerator CZ wei the number average molecular weight and t average molecular weight of DRR significantly decreased firstly and then increased, the molecular weight distribution gradually increased, the reprocessability increased, and the tensile properties increased firstly and then decreased. When mass fraction of CZ was 2% , overall performance of DRR was best.