摘要
用附着型促进剂PBS在机械混炼插层法的基础上制备了天然橡胶／蒙脱土纳米复合材料。由于硫化后大部分促进剂基团都连在橡胶分子链上，因此用分子一端能和蒙脱土片层有相互作用的附着型硫化促进剂，可以大大增强蒙脱土和橡胶基体的相互作用，得到性能优良纳米复合材料。用PBS制备纳米复合材料其硫化体系活性能低，硫化胶交联密度增大，有机蒙脱土片层在橡胶基体中达到纳米级的分散，具有优良的力学性能，加入8％有机蒙脱土100％模量从1．2MPa增至2．2MPa，500％模量从8．12MPa增至18．23MPa，邵氏GA硬度从45增至55，而加入2％有机蒙脱土500％模量从8．12MPa增至17．06MPa，撕裂强度从36．31kN／m增至43．65kN／m，加入2～10份有机蒙脱土时其效果相当于加入40份半补强炭黑。
The natural rubber - montmorillonite nanocomposites were prepared with adhesive accelerator PBS by mixing intercalation method. Because most of the accelerator radical group was linked on the rubber chains after curing, using the accelerator whose radical group＇s end could interact with the montmorillonite layers, the interaction between montmorillonite fleets and rubber chains could be enhanced, and natural rubber - montmorillonite nanocomposites with good comprehensive properties could be prepared. On the effect of the adhesive accelerator PBS, itcould decrease activation energy of curing and the new system with the organic montmorillonite （HMT） had larger crosslinking density. And the natural rubber/montmorillonite nanocomposites had good mechanical properties. When adding 8% HMT, 100% modulus increased from 1.20 MPa to 2.20 MPa, 500% modulus increased from 8.12 MPa to 18.23 MPa Shore A hardness enhanced from 45 to 55. When just add 2 phr HMT it came out a big value, 500% modulus ranges from 8.12 MPa to 17.06 MPa and tear strenth ranges from 36.31 kN/m to 43.65 kN/m, in other words, 8 phr HMT was comparable to 40 phr semi rein forced carbon. The mechanical properties of NR with 2～10 phr HMT was comparable to the compound with 40 phr semi reinforced carbon black.
出处
《热固性树脂》
CAS
CSCD
2006年第6期1-5,17,共6页
Thermosetting Resin
基金
国家自然科学基金资助项目(50573021)
