A novel grafting-modified waste rubber powder as filler in natural rubber vulcanizates

作者：Yu, Ruobing^*; Gong, Zhaohong; Guo, Weihong; Zhang, Haibin; Liu, Chunling

来源：Journal of Applied Polymer Science, 2016, 133(6): 42993.

DOI：10.1002/app.42993

• composites
• grafting
• mechanical properties
• rubber

Polycardanol was synthesized from cardanol, paraformaldehyde, p-toluenesulfonic acid, phosphoric acid (H3PO4), and phosphorus pentoxide (P2O5) via a two-step process. Results indicated that polycardanol is an acid with high molecular weight and can be self-crosslinked at high temperature. A modified WRP (MWRP) grafted by long chain can be obtained from the reaction between WRP and polycardanol. The sulfur content of MWRP is 0.27%, which is lower than that of WRP by 0.47%. The oxygen content of MWRP is higher by 13% than that of WRP. The phosphorus content of MWRP reaches 5.25%. The water contact angle of MWRP is 91.5 degrees, whereas that of WRP is 123.7 degrees. The properties of the WRP/NR and MWRP/NR composites were also investigated. MWRP/NR possesses higher tensile strength than WRP/NR because of the enhanced interfacial interaction between MWRP and the NR matrix. Post-treatment is also conducive for MWRP/NR to improve its tensile strength at high MWRP content.

• 出版日期2016-2-10
• 单位华东理工大学