废旧天然胶胶粉应用研究

以80目的废天然胶胶粉为研究对象,处理后将其分别以20%,30%的比例添加到天然混炼胶(NR)中,制备废胶粉/NR共混硫化胶;同时,通过邻苯二甲酸酐(PA)和高芳烃油对胶粉进行处理改性,制备了全胶粉弹性体。拉伸强度测试表明,对于共混胶弹性体,NR混炼胶空白样的拉伸强度为19.21 MPa,添加20%,30%比例的胶粉/NR共混硫化胶的拉伸强度可以分别达到18.03 MPa,17.23 MPa;改性后制备的全胶粉混炼胶硫化样品拉伸强度达到8.12 MPa,超过了再生胶的国标标准。同时应用扫描电子显微镜SEM分析、比较了各试样断裂面的微观结构,应用比表面仪BET和SEM表征了胶粉的表面形貌与结构,发现胶粉表面呈现"绒球"状,具有较好的表面性能。

Research on the application of waste natural rubber powder

This paper researched on waste NR powder whose particle size is 80 mesh. The waste NR powder wasadded to NR refined mixed rubber R7626 with 20% and 30% respectively for preparing rubber powder/NR blend. Meantime, the waste NR powder was modified by phthalic anhydride （PA） and high aromatic oil for preparing all rubber powder elastomer. The results showed that the tensile strength of mixed vulcanizates could respectively reach to 18.03 MPa and 17.23 MPa, while the tensile strength of the blank specimen was 19.21 Mpa. The tensile strength of the vulcanization rubber which was completely made by waste NR powder was 8.12 MPa, which was over the GB standard （reclaimed 6 MPa tensile strength）. The surface conformation and topography of waste rubber powder were detected through BET and SEM, and the microstructure of transverse cross-section was analyzed and compared by SEM detection.